CN113362621A - Oblique-insertion type crossing method and system for left-turning non-motor vehicles at parallel flow intersection - Google Patents
Oblique-insertion type crossing method and system for left-turning non-motor vehicles at parallel flow intersection Download PDFInfo
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Abstract
A method and a system for obliquely inserting a non-motor vehicle at a left turn intersection of a parallel flow intersection belong to the field of traffic engineering. The invention solves the problem that the running tracks of the left-turning non-motor vehicle and the straight-going motor vehicle conflict with each other in the existing parallel flow intersection. According to the invention, through optimizing and improving the geometric layout of the parallel flow intersection, an intersection left-turn non-motor vehicle chute is arranged between the running track of the straight-going motor vehicle at the main signal intersection and the running track of the left-turn motor vehicle released in the same phase, and the conflict between the left-turn non-motor vehicle at the main signal intersection and the straight-going motor vehicle is eliminated under the condition that the running of the motor vehicle at the parallel flow intersection is not influenced. And meanwhile, a left-turn non-motor vehicle running rule is stipulated, a corresponding phase-phase sequence scheme and a corresponding signal control method are provided, so that the safe passing of the left-turn non-motor vehicle at the parallel flow intersection is ensured, and the running efficiency of the parallel flow intersection is improved by finely controlling the traffic organization of the parallel flow intersection. The invention can be applied to the field of traffic engineering.
Description
Technical Field
The invention belongs to the field of traffic engineering, and particularly relates to a method and a system for obliquely inserting type crossing of a left-turning non-motor vehicle at a parallel flow intersection.
Background
With the continuous increase of the quantity of motor vehicles, the urban traffic jam is increasingly serious, and the traffic demand of the conventional plane intersection design can not be met. Therefore, the design of unconventional intersections such as left-turn intersections, continuous flow intersections, serial intersections and the like is proposed by means of the method, the method is gradually implemented in the domestic cities, and the implementation effect is good.
The patent CN109615893A discloses a left-turn right-disposed parallel flow intersection, wherein an inlet left-turn lane is arranged on the right side of an inlet straight lane, a shift left-turn lane is arranged between the inlet left-turn lane and the inlet straight lane, the driving direction of the shift left-turn lane is opposite to that of the inlet left-turn lane, and a pre-signalized intersection is arranged on a road section of the inlet lane; the left-turn vehicles start from the main signal stop line, arrive at the pre-signal stop line along the displacement left-turn lane, and drive into the opposite exit lane through the indication of the pre-signal lamp, so that left-turn is realized, the left-turn and straight-going conflict at the main signal intersection is eliminated, the left-turn traffic flow on one road can be released at the main signal intersection, the left-turn traffic flow on the other road can be released at the same time, the capacity can be increased by about one time theoretically, and the traffic benefit is remarkable. The patent CN110060488A discloses a parallel flow intersection with a left turn and a middle turn, and provides a control method for avoiding secondary parking of vehicles, so that the problem of multiple parking of the vehicles at the parallel flow intersection is solved, and the running efficiency of the parallel flow intersection is further improved.
However, none of the above methods solves the problem of non-motor vehicle traffic at a parallel flow intersection, particularly left-turn non-motor vehicle traffic. In China, the proportion of non-motor vehicles in a trip mode is large, and for a conventional plane intersection, the non-motor vehicles adopt the same operation mode as the motor vehicles. However, for the parallel flow intersection, when the left-turning motor vehicle is released, the straight-going vehicle flow on the other road is released, and the straight-going vehicle flow conflicts with the running track of the left-turning non-motor vehicle, so that the left-turning non-motor vehicle cannot adopt a passing mode of turning left along with the left-turning motor vehicle, and the problem of the left-turning non-motor vehicle passing on the parallel flow intersection is indispensable for enabling the parallel flow intersection to better meet the current traffic situation of China.
Disclosure of Invention
The invention aims to solve the problem that the running tracks of a left-turn non-motor vehicle and a straight-going motor vehicle conflict with each other in the existing parallel flow intersection, and provides a left-turn non-motor vehicle oblique-insertion type crossing method and system for the parallel flow intersection.
The technical scheme adopted by the invention for solving the technical problems is as follows:
based on one aspect of the invention, the method for the oblique-insertion type crossing of the non-motor vehicle at the left turn of the parallel flow intersection comprises the following steps of traffic geometric design and signal control, wherein the traffic geometric design specifically comprises the following steps:
for each inlet of the parallel flow intersection, a left-turn non-motor vehicle secondary parking waiting area is arranged between the displacement left-turn lane and the inlet straight lane and on one side close to the main signal intersection;
a left-turn non-motor vehicle one-way lane of a south entrance is arranged between a straight-going motor vehicle running track of the west entrance and a left-turn motor vehicle running track of a south entrance released in the same phase in the center of a main signal intersection of a parallel flow intersection, and the left-turn non-motor vehicle one-way lane of the south entrance is connected to a left-turn non-motor vehicle secondary parking waiting area positioned at the west entrance;
in the center of a main signal intersection of the parallel flow intersection, a left-turn non-motor vehicle one-way lane of a north entrance is arranged between a straight-going motor vehicle running track of the east entrance and a left-turn motor vehicle running track of the north entrance released in the same phase, and the left-turn non-motor vehicle one-way lane of the north entrance is connected to a left-turn non-motor vehicle secondary parking waiting area positioned at the east entrance;
a left-turn non-motor vehicle one-way lane of an east entrance is arranged between a straight motor vehicle running track of the south entrance and a left-turn motor vehicle running track of the east entrance released in the same phase in the center of a main signal intersection of a parallel flow intersection, and the left-turn non-motor vehicle one-way lane of the east entrance is connected to a left-turn non-motor vehicle secondary parking waiting area positioned at the south entrance;
in the center of a main signal intersection of the parallel flow intersection, a left-turn non-motor vehicle one-way lane of a west entrance is arranged between a straight-going motor vehicle running track of the north entrance and a left-turn motor vehicle running track of the west entrance released in the same phase, and the left-turn non-motor vehicle one-way lane of the west entrance is connected to a left-turn non-motor vehicle secondary parking waiting area positioned at the north entrance;
the signal control specifically comprises:
the main signal motor vehicle is controlled by two phase signals, wherein the two phases are a combined phase formed by east-west direct driving and south-north left turning and a combined phase formed by south-north direct driving and east-west left turning respectively;
when the phase green light of the main signal motor vehicle displays east-west direct movement and south-north left turning, the non-motor vehicles turning left to south and north run to a left-turning non-motor vehicle secondary parking waiting area from the safety island through the left-turning non-motor vehicle one-way lane; when the green lamp of the main signal motor vehicle phase displays the south-north straight driving and the east-west left turning, the south-north left turning non-motor vehicle of the previous phase drives to the roadside safety island from the left turning non-motor vehicle secondary parking waiting driving area through the intersection non-motor vehicle crosswalk;
when the phase green light of the main signal motor vehicle displays the south-north straight driving and the east-west left turning, the east-west left turning non-motor vehicle runs to the left turning non-motor vehicle secondary parking waiting area from the safety island through the left turning non-motor vehicle one-way lane; when the green lamp of the main signal motor vehicle phase displays that the east and the west are straight and the south and the north are turning left, the east and the west turning left non-motor vehicles of the previous phase drive to the roadside safety island from the left turning non-motor vehicle secondary parking waiting area through the intersection non-motor vehicle crossroads.
Based on another aspect of the invention, the method for the oblique-insertion type crossing of the non-motor vehicle at the left turn of the parallel flow intersection comprises traffic geometric design and signal control, wherein the traffic geometric design specifically comprises the following steps:
for each inlet of the parallel flow intersection, a shift left-turn non-motor vehicle lane is arranged between the shift left-turn motor vehicle lane and the inlet straight-through vehicle lane, one side of the shift left-turn non-motor vehicle lane, which is close to the main signal, is called the head end of the shift left-turn non-motor vehicle lane, and one side of the shift left-turn non-motor vehicle lane, which is close to the pre-signal, is called the tail end of the shift left-turn non-motor vehicle lane;
a left-turn non-motor vehicle one-way lane of a south inlet is arranged between a straight-going motor vehicle running track of the west inlet and a left-turn motor vehicle running track of the south inlet in the center of a main signal intersection of the parallel flow intersection, one end of the left-turn non-motor vehicle one-way lane of the south inlet is connected with the head end of a displacement left-turn non-motor vehicle lane positioned at the west inlet, and the other end of the left-turn non-motor vehicle one-way lane of the south inlet is connected with a safety island;
a left-turn non-motor vehicle one-way lane of a north entrance is arranged between a straight motor vehicle running track of the east entrance and a left-turn motor vehicle running track of the north entrance in the center of a main signal intersection of a parallel flow intersection, one end of the left-turn non-motor vehicle one-way lane of the north entrance is connected with the head end of a displacement left-turn non-motor vehicle lane positioned at the east entrance, and the other end of the left-turn non-motor vehicle one-way lane of the north entrance is connected with a safety island;
a left-turn non-motor vehicle one-way lane of an east inlet is arranged between a straight motor vehicle running track of a south inlet and a left-turn motor vehicle running track of the east inlet in the center of a main signal intersection of a parallel flow intersection, one end of the left-turn non-motor vehicle one-way lane of the east inlet is connected with the head end of a displacement left-turn non-motor vehicle lane positioned at the south inlet, and the other end of the left-turn non-motor vehicle one-way lane of the east inlet is connected with a safety island;
a left-turn non-motor vehicle one-way lane of a west inlet is arranged between a straight motor vehicle running track of the north inlet and a left-turn motor vehicle running track of the west inlet in the center of a main signal intersection of a parallel flow intersection, one end of the left-turn non-motor vehicle one-way lane of the west inlet is connected with the head end of a displacement left-turn non-motor vehicle lane positioned at the north inlet, and the other end of the left-turn non-motor vehicle one-way lane of the north inlet is connected with a safety island;
arranging a transverse left-turn non-motor vehicle lane from the tail end of the left-turn non-motor vehicle lane to the roadside in a direction perpendicular to the exit lane at the pre-signal position of the parallel flow intersection;
the signal control specifically comprises:
at the main signal position, the main signal motor vehicle is controlled by two phase signals, namely a combined phase formed by east-west direct driving and south-north left turning and a combined phase formed by south-north direct driving and east-west left turning;
when the green light of the phase of the main signal motor vehicle displays east-west direct movement and south-north left turning, the south-north left turning non-motor vehicle runs to a pre-signal position from the safety island through the left turning non-motor vehicle one-way lane and the shifting left turning non-motor vehicle lane, the process is a first stage, and then the vehicle stops waiting or passes through the transverse left turning non-motor vehicle lane according to the indication of the pre-signal left turning non-motor vehicle signal light, and the process of passing through the transverse left turning non-motor vehicle lane is a second stage;
when the main signal motor vehicle phase green light displays south-north straight driving and east-west left turning, the east-west left turning non-motor vehicle runs to the pre-signal position from the safety island through the left turning non-motor vehicle one-way lane and the left turning non-motor vehicle lane, and then stops for waiting or passes through the transverse left turning non-motor vehicle lane according to the indication of the pre-signal left turning non-motor vehicle signal light.
Based on another aspect of the invention, the invention provides a left-turn non-motor vehicle oblique-insertion type crossing system for a parallel flow intersection, which is used for executing a left-turn non-motor vehicle oblique-insertion type crossing method for the parallel flow intersection.
The invention has the beneficial effects that: the invention provides a method and a system for obliquely inserting type crossing of a left-turning non-motor vehicle at a parallel flow intersection. And simultaneously, a corresponding control method is provided to ensure the safe passing of the left-turning non-motor vehicles at the intersection of the parallel flow. The intersection left-turn non-motor vehicle lane is arranged between the left-turn driving track and the straight driving motor vehicle driving track, and the colored pavement is adopted, so that the traffic organization of the parallel flow intersection can be more finely controlled, and the running efficiency of the parallel flow intersection is improved.
Drawings
Fig. 1 is a schematic diagram of traffic design and a first-stage traffic organization of a left-turn non-motor vehicle oblique-plug type crossing method at a parallel flow intersection according to a first embodiment;
in the figure, E is an entrance left-turn lane, G is an entrance straight lane (equivalent to a straight lane in patent CN 109615893A), F is a shift left-turn lane (equivalent to a reverse right-turn lane in patent CN 109615893A), H is a pre-signalized intersection (equivalent to a temporary intersection in patent CN 109615893A), D is a left-turn non-motor vehicle one-way lane, B is a left-turn non-motor vehicle secondary parking waiting area, a is a safety island, and C is a road side;
FIG. 2 is a schematic diagram of traffic design and second-stage traffic organization of a left-turn non-motor vehicle oblique-insertion type crossing method at a parallel flow intersection according to a first embodiment;
FIG. 3 is a schematic diagram of a signal phase-sequence scheme for a left turn non-motor vehicle plug-in crossing at a parallel flow intersection according to a first embodiment;
FIG. 4 is a schematic diagram of traffic design and traffic organization of a left turn non-motor vehicle plug-in crossing method at a parallel flow intersection according to a sixth embodiment;
in the figure, J is an entrance left-turn lane, H is an entrance straight lane (equivalent to the straight lane in patent CN 109615893A), I is a left-turn-shift motor lane (equivalent to the reverse right-turn lane in patent CN 109615893A), K is a pre-signalized intersection (equivalent to the temporary intersection in patent CN 109615893A), D is a left-turn-shift non-motor lane, C is the head end of the left-turn-shift non-motor lane, E is the tail end of the left-turn-shift non-motor lane, B is a left-turn non-motor one-way lane, a is a safety island, F is a transverse left-turn non-motor lane, and G is the roadside;
fig. 5 is a schematic diagram of a main signal phase-sequence scheme for left-turn non-motor vehicle oblique-plug crossing at a parallel flow intersection according to a sixth embodiment.
Detailed Description
First embodiment this embodiment will be described with reference to fig. 1, 2, and 3. The oblique-insertion type crossing method for the left-turn non-motor vehicle at the parallel flow intersection comprises the steps of traffic geometric design and signal control; the traffic geometry design specifically comprises:
for each inlet of the parallel flow intersection, a left-turn non-motor vehicle secondary parking waiting area is arranged between the displacement left-turn lane and the inlet straight lane and on one side close to the main signal intersection;
taking the west entrance as an example, the entrance direction refers to the direction of driving from the west side to the main signalized intersection, and the straight lane of the motor vehicle at the west entrance is G in the graph 1; the same definition for other imports;
a left-turn non-motor vehicle one-way lane of a south entrance is arranged between a straight-going motor vehicle running track of the west entrance and a left-turn motor vehicle running track of a south entrance released in the same phase in the center of a main signal intersection of a parallel flow intersection, and the left-turn non-motor vehicle one-way lane of the south entrance is connected to a left-turn non-motor vehicle secondary parking waiting area positioned at the west entrance;
in the center of a main signal intersection of the parallel flow intersection, a left-turn non-motor vehicle one-way lane of a north entrance is arranged between a straight-going motor vehicle running track of the east entrance and a left-turn motor vehicle running track of the north entrance released in the same phase, and the left-turn non-motor vehicle one-way lane of the north entrance is connected to a left-turn non-motor vehicle secondary parking waiting area positioned at the east entrance;
a left-turn non-motor vehicle one-way lane of an east entrance is arranged between a straight motor vehicle running track of the south entrance and a left-turn motor vehicle running track of the east entrance released in the same phase in the center of a main signal intersection of a parallel flow intersection, and the left-turn non-motor vehicle one-way lane of the east entrance is connected to a left-turn non-motor vehicle secondary parking waiting area positioned at the south entrance;
in the center of a main signal intersection of the parallel flow intersection, a left-turn non-motor vehicle one-way lane of a west entrance is arranged between a straight-going motor vehicle running track of the north entrance and a left-turn motor vehicle running track of the west entrance released in the same phase, and the left-turn non-motor vehicle one-way lane of the west entrance is connected to a left-turn non-motor vehicle secondary parking waiting area positioned at the north entrance;
the left-turn non-motor vehicle one-way lane is called as an intersection left-turn non-motor vehicle chute, only the left-turn non-motor vehicle is driven to a left-turn non-motor vehicle secondary parking waiting area from a safety island, reverse passing is not allowed, and colored pavement can be adopted to increase the conspicuity. The non-motor vehicle turning left arrives from the safety island (A in figure 1) and then stops to wait for the indication of the second-stage signal light. When the number of the non-motor vehicles which can be accommodated in the left-turn non-motor vehicle secondary parking waiting area does not meet the requirement, the isolation belt between the left-turn lane and the inlet straight lane can be partially occupied according to the requirement so as to increase the area of the left-turn non-motor vehicle secondary parking waiting area;
the signal control specifically comprises:
the main signal motor vehicle is controlled by two phase signals, wherein the two phases are a combined phase formed by east-west direct driving and south-north left turning and a combined phase formed by south-north direct driving and east-west left turning respectively;
the first stage (from the safety island to the secondary parking waiting area) of the main signal south-north left-turning non-motor vehicle is released in phase with east-west straight going and south-north left turning, and the second stage (from the secondary parking waiting area to the safety island) of the main signal south-north left-turning non-motor vehicle is released in phase with south-north straight going and east-west left turning. The first stage of the main signal east-west left-turning non-motor vehicle is released with the same phase of south-north straight going and east-west left turning, and the second stage of the main signal east-west left-turning non-motor vehicle is released with the same phase of east-west straight going and south-north left turning;
when the phase green light of the main signal motor vehicle displays east-west straight movement and south-north left turning, the south-north left turning non-motor vehicles run to the left turning non-motor vehicle secondary parking waiting area of the west-east import from the safety island through the left turning non-motor vehicle one-way lanes of the south-north import; when the green lamp of the main signal motor vehicle phase displays the south-north straight line and the east-west left turn, the south-north left turn non-motor vehicle of the previous phase runs to the roadside safety island from the left turn non-motor vehicle secondary parking waiting area of the west and east entrances through the crossroad non-motor vehicle crosswalk; the intersection non-motor vehicle crosswalk is a non-motor vehicle crosswalk with the main signal intersection and the pedestrian crosswalk in parallel, and is closer to the center of the main signal intersection than the pedestrian crosswalk;
when the main signal motor vehicle phase green light displays that the vehicle travels straight from south to north and turns left from east to west, the east and west left-turning non-motor vehicles travel from the safety island to the left-turning non-motor vehicle secondary parking waiting areas at the south and north entrances through the left-turning non-motor vehicle one-way lanes at the east and west entrances, and when the main signal motor vehicle phase green light displays that the vehicle travels straight from east to west and turns left from south to north, the east and west left-turning non-motor vehicles at the previous phase travel from the left-turning non-motor vehicle secondary parking waiting areas at the south and north entrances to the roadside safety island through the intersection non-motor vehicle cross-way.
In the first stage of turning left-turn non-motor vehicles from south to north, the non-motor vehicles are driven to a left-turn non-motor vehicle secondary parking waiting area from a safety island through a road junction. When the south-north turning non-motor vehicles are released in the first phase, the main signal motor vehicle phase green lamp displays east-west direct movement and south-north turning left, and no conflict exists between the left turning non-motor vehicles and the motor vehicle phase allowing the released traffic flow. And in the second stage of the south-north left-turning non-motor vehicles, the non-motor vehicles are parked for the second time from the left-turning non-motor vehicles to the roadside safety island, so that the whole left-turning process is realized. When the south-north left-turning non-motor vehicles are released in the second phase, the green lamp of the phase of the main signal motor vehicle displays the south-north straight running and the east-west left turning, and the left-turning non-motor vehicles and the motor vehicle phase allow the released traffic flow to have no conflict.
In the first stage of the east-west left-turning non-motor vehicles, the vehicles run from the safety island to the left-turning non-motor vehicle waiting area through the road junction. When the east-west left-turning non-motor vehicle is released in the first phase, the green lamp of the phase of the main signal motor vehicle displays the south-north straight running and the east-west left turning, and the left-turning non-motor vehicle and the motor vehicle phase allow the released traffic flow to have no conflict. And in the second stage of the east-west left-turning non-motor vehicle, the non-motor vehicle is parked for the second time from the left-turning non-motor vehicle to a roadside safety island, so that the whole left-turning process is realized. When the east-west left-turning non-motor vehicles are released in the second phase, the green lamp of the phase of the main signal motor vehicle displays east-west direct movement and south-north left turning, and the left-turning non-motor vehicles and the motor vehicle phase allow the released traffic flow to have no conflict.
The second embodiment is as follows: the difference between the embodiment and the specific embodiment is that the capacity of the secondary parking waiting area of the left-turning non-motor vehicle meets the following condition:
in the formula: n is a radical ofmaxThe number of the non-motor vehicles which can be accommodated in the secondary parking waiting area for the left-turning non-motor vehicles is in units of vehicles; mu is the flow fluctuation coefficient of the non-motor vehicle; c is the signal period duration, and the unit is second;
for left turn non-motor traffic demand, the units are vehicles/second.
The third concrete implementation mode: the difference between the present embodiment and the second embodiment is that the process from the safety island to the left-turn non-motor vehicle secondary parking waiting area through the left-turn non-motor vehicle one-way lane is the first stage, and the time required for the left-turn non-motor vehicle to complete the first stage satisfies the following conditions: the time required for the non-motor vehicle to turn left to complete the first phase is not more than the phase time of the motor vehicle;
in the formula: l is1The length of a running track from a safety island to a left-turning non-motor vehicle to a secondary parking waiting area is the length of the running track in meters;
the running speed of the non-motor vehicle is left-turning, and the unit is meter/second;
in the first stage, the saturation flow rate of a traffic area between a safety island and a secondary parking waiting area of the left-turning non-motor vehicle is measured in units of vehicles per second;
the unit is the phase time of the motor vehicle in the first phase.
The fourth concrete implementation mode: the third difference between the present embodiment and the specific embodiment is that the process of the left-turn non-motor vehicle driving from the left-turn non-motor vehicle secondary parking waiting area to the roadside safety island through the intersection non-motor vehicle crosswalk is the second stage, and the emptying time of the left-turn non-motor vehicle secondary parking waiting area satisfies the following constraint:
in the formula: l is2The length of a running track from a left-turn non-motor vehicle secondary parking waiting area to a safety island in the second stage is the length of the running track in meters;
the saturation flow rate of a passing area between a left-turning non-motor vehicle secondary parking waiting area and a roadside safety island in the second stage is the unit of vehicle/second;
the phase time of the vehicle in the second stage is the unit of second.
The embodiment is used for avoiding the left-turning non-motor vehicle from staying in a secondary parking waiting area of the left-turning non-motor vehicle after the phase of the left-turning non-motor vehicle at the second stage is finished.
The fifth concrete implementation mode: the fourth difference between this embodiment and the specific embodiment is that the parallel flow intersection is a parallel flow intersection that is left-turning and left-placing, left-turning and middle-placing, or left-turning and right-placing.
The parallel flow intersection in the embodiment is a design scheme of a left-turn right-set parallel flow intersection in patent CN109615893A, or a design scheme of a left-turn left-set and left-set parallel flow intersection in patent CN 110060488A.
Sixth embodiment this embodiment will be described with reference to fig. 4 and 5. The oblique-insertion type crossing method for the left-turn non-motor vehicle at the parallel flow intersection comprises the steps of traffic geometric design and signal control; the traffic geometry design specifically comprises:
for each inlet of the parallel flow intersection, a shift left-turn non-motor vehicle lane is arranged between the shift left-turn motor vehicle lane and the inlet straight-through vehicle lane, one side of the shift left-turn non-motor vehicle lane, which is close to the main signal, is called the head end of the shift left-turn non-motor vehicle lane, and one side of the shift left-turn non-motor vehicle lane, which is close to the pre-signal, is called the tail end of the shift left-turn non-motor vehicle lane;
taking the west entrance as an example, the entrance direction refers to the direction of driving from the west side to the main signalized intersection, and the straight lane of the motor vehicle at the west entrance is H in the figure 4; the same definition for other imports;
the left-turning non-motor vehicle lane is shifted to only allow the left-turning non-motor vehicle to reach the pre-signal from the main signal, reverse traffic is not allowed, and colored pavement can be adopted to increase the conspicuity;
a left-turn non-motor vehicle one-way lane of a south inlet is arranged between a straight-going motor vehicle running track of the west inlet and a left-turn motor vehicle running track of the south inlet in the center of a main signal intersection of the parallel flow intersection, one end of the left-turn non-motor vehicle one-way lane of the south inlet is connected with the head end of a displacement left-turn non-motor vehicle lane positioned at the west inlet, and the other end of the left-turn non-motor vehicle one-way lane of the south inlet is connected with a safety island;
a left-turn non-motor vehicle one-way lane of a north entrance is arranged between a straight motor vehicle running track of the east entrance and a left-turn motor vehicle running track of the north entrance in the center of a main signal intersection of a parallel flow intersection, one end of the left-turn non-motor vehicle one-way lane of the north entrance is connected with the head end of a displacement left-turn non-motor vehicle lane positioned at the east entrance, and the other end of the left-turn non-motor vehicle one-way lane of the north entrance is connected with a safety island;
a left-turn non-motor vehicle one-way lane of an east inlet is arranged between a straight motor vehicle running track of a south inlet and a left-turn motor vehicle running track of the east inlet in the center of a main signal intersection of a parallel flow intersection, one end of the left-turn non-motor vehicle one-way lane of the east inlet is connected with the head end of a displacement left-turn non-motor vehicle lane positioned at the south inlet, and the other end of the left-turn non-motor vehicle one-way lane of the east inlet is connected with a safety island;
a left-turn non-motor vehicle one-way lane of a west inlet is arranged between a straight motor vehicle running track of the north inlet and a left-turn motor vehicle running track of the west inlet in the center of a main signal intersection of a parallel flow intersection, one end of the left-turn non-motor vehicle one-way lane of the west inlet is connected with the head end of a displacement left-turn non-motor vehicle lane positioned at the north inlet, and the other end of the left-turn non-motor vehicle one-way lane of the north inlet is connected with a safety island;
the left-turn non-motor vehicle one-way lane is called as an 'intersection left-turn non-motor vehicle chute', only allows the left-turn non-motor vehicle to run from the safety island to the left-turn non-motor vehicle lane, does not allow reverse traffic, and can adopt colored pavement to increase the conspicuity;
arranging a transverse left-turn non-motor vehicle lane from the tail end of the left-turn non-motor vehicle lane to the roadside in a direction perpendicular to the exit lane at the pre-signal position of the parallel flow intersection;
the transverse left-turn non-motor vehicle lane is only used for driving a left-turn non-motor vehicle to the road side from the tail end of the shift left-turn non-motor vehicle lane, reverse traffic is not allowed, and colored pavement can be adopted to increase the conspicuity;
the signal control specifically comprises:
at the main signal position, the main signal motor vehicle is controlled by two phase signals, namely a combined phase formed by east-west direct driving and south-north left turning and a combined phase formed by south-north direct driving and east-west left turning;
the main signal south-north left-turning non-motor vehicle is released in phase with the east-west straight motor vehicle and the south-north left-turning motor vehicle, and the main signal east-west left-turning non-motor vehicle is released in phase with the south-north straight motor vehicle and the east-west left-turning motor vehicle;
at the pre-signal, the time that the left-turn non-motor vehicle passes through the transverse left-turn non-motor vehicle lane at the pre-signal intersection is not allowed to coincide with the pre-signal entry straight-through clearance time period and the time that the motor vehicle on the exit straight-through lane passes through the transverse left-turn non-motor vehicle lane. If the length of the passable time interval does not meet the requirement that the left-turning non-motor vehicle passes through the transverse left-turning non-motor vehicle lane, the problem can be solved by increasing the width of the transverse left-turning non-motor vehicle lane;
in order to avoid the coincidence of the time when the left-turn non-motor vehicle passes through the transverse left-turn non-motor vehicle lane and the time when the motor vehicle on the exit straight lane passes through the transverse left-turn non-motor vehicle lane, a signal lamp for controlling the motor vehicle on the exit straight lane to be released is arranged at a pre-signal position, so that the signal lamp for controlling the exit straight lane to display a red light when the left-turn non-motor vehicle passes through the transverse left-turn non-motor vehicle lane, and the mutual conflict between the signal lamp and the red light is avoided.
The traffic organization system for the left-turn non-motor vehicles to pass through along with the left-turn motor vehicles at the parallel flow intersection comprises:
when the main signal motor vehicle phase green light displays the east-west straight goingWhen turning left, the non-motor vehicles turning left from south to north run from the safety island to the pre-signal position through the non-motor vehicle unidirectional lane turning left and the non-motor vehicle lane turning left shifting, the process is the first stage, then according to the pre-signal lamp indication of the non-motor vehicles turning left, the non-motor vehicles stop to wait or pass through the transverse left-turning non-motor vehicle lane, and the process of passing through the transverse left-turning non-motor vehicle lane is the second stage; when the east-west straight-driving motor vehicles display red light at the pre-signalized intersection control signal lamp on the east-west entrance road section, the south-north left-turning non-motor vehicles select one section of time length
And a green light is released as a second stage, and the stage controls the signal light of the exit straight lane to display a red light.
The left turn non-motor vehicle and the motor vehicle phase allow the flow of the vehicle to be released without conflict. And in the second stage of the south-north left-turning non-motor vehicles, the non-motor vehicles run to the roadside from the tail end of the displacement left-turning non-motor vehicle lane through the transverse left-turning non-motor vehicle lane, so that the left turning of the non-motor vehicles at the parallel flow intersection is realized. The time period that the south-north left-turning non-motor vehicles pass through the transverse left-turning non-motor vehicle lane in the second stage is not allowed to coincide with the east-west straight passing time period of the pre-signal and the time period that the east-west straight passing vehicles reach the transverse left-turning non-motor vehicle lane along the exit lane;
when the phase green light of the main signal motor vehicle displays the south-north straight driving and the east-west left turning, the east-west left turning non-motor vehicle runs to a pre-signal position from the safety island through the left turning non-motor vehicle one-way lane and the shifting left turning non-motor vehicle lane, and then stops for waiting or passes through the transverse left turning non-motor vehicle lane according to the indication of the pre-signal left turning non-motor vehicle signal light; when the south-north straight-going motor vehicles display red light at the pre-signalized intersection control signal lamp on the south-north entrance road section, the east-west left-turning non-motor vehicles select one section of time length
And a green light is released as a second stage, and the stage controls the signal light of the exit straight lane to display a red light.
When the east-west left-turning non-motor vehicle passes through the main signal in the first stage, the green lamp of the phase position of the motor vehicle of the main signal displays the south-north straight going and the east-west left turning, and the left-turning non-motor vehicle and the motor vehicle phase position allow the traffic flow to be released without conflict. And in the second stage of the east-west left-turn non-motor vehicles, the east-west left-turn non-motor vehicles run to the roadside from the tail end of the displacement left-turn non-motor vehicle lane through the transverse left-turn non-motor vehicle lane, so that the left turn of the non-motor vehicles at the parallel flow intersection is realized. The time interval that the east-west left-turning non-motor vehicles pass through the transverse left-turning non-motor vehicle lane in the second stage is not allowed to coincide with the south-north straight passing time interval of the pre-signal and the time interval that the south-north straight passing vehicles reach the transverse left-turning non-motor vehicle lane along the exit lane;
the seventh embodiment: the present embodiment differs from the sixth embodiment in that the capacity of the left-turn non-motor vehicle lane satisfies the following condition:
in the formula: n is a radical ofmaxThe number of non-motor vehicles which can be accommodated for shifting the left-turning non-motor vehicle lane is in units of vehicles; mu is the flow fluctuation coefficient of the non-motor vehicle; c is the signal period duration, and the unit is second;
for left turn non-motor traffic demand, the units are vehicles/second.
The specific implementation mode is eight: the seventh embodiment is different from the seventh embodiment in that the time required for the left-turn non-motor vehicle to pass through the main signalized intersection in the first stage is not more than the phase time of the motor vehicle, and the specific conditions are as follows;
in the formula: l is1The length of a running track of a left-turn non-motor vehicle from a safety island to the head end of a left-turn non-motor vehicle lane in a first stage is meter;
for left-hand turning of non-motor vehiclesDegree, in meters per second;
in the first stage, the saturation flow rate of a traffic area between the safety island and the head end of the left-turning non-motor vehicle lane is measured in units of vehicles per second;
the phase time of the motor vehicle in the first phase is in seconds;
the left-turn non-motor vehicle is calculated as follows in the second stage release phase duration:
in the formula:
releasing the phase time of the non-motor vehicle for the left turn at the second stage, wherein the unit is second; l is2The length of a transverse left-turning non-motor vehicle lane for the left-turning non-motor vehicle in the second stage is measured in meters;
the lateral left turn lane saturation flow rate for the left turn non-motorized vehicle in the second phase is in units of vehicles/second.
The specific implementation method nine: the eighth embodiment is different from the eighth embodiment in that the parallel flow intersection is a parallel flow intersection which is left-turning and left-placing, left-turning and middle-placing or left-turning and right-placing.
The parallel flow intersection in the embodiment is a design scheme of a left-turn right-set parallel flow intersection in patent CN109615893A, or a design scheme of a left-turn left-set and left-set parallel flow intersection in patent CN 110060488A.
The detailed implementation mode is ten: the left-turn non-motor vehicle oblique-insertion type crossing system of the parallel flow intersection is used for executing a left-turn non-motor vehicle oblique-insertion type crossing method of one of the first embodiment to the ninth embodiment.
The above-described calculation examples of the present invention are merely to explain the calculation model and the calculation flow of the present invention in detail, and are not intended to limit the embodiments of the present invention. It will be apparent to those skilled in the art that other variations and modifications of the present invention can be made based on the above description, and it is not intended to be exhaustive or to limit the invention to the precise form disclosed, and all such modifications and variations are possible and contemplated as falling within the scope of the invention.
Claims (10)
1. The method for the oblique-insertion type crossing of the non-motor vehicle at the left turn of the parallel flow intersection comprises traffic geometric design and signal control, and is characterized in that the traffic geometric design specifically comprises the following steps:
for each inlet of the parallel flow intersection, a left-turn non-motor vehicle secondary parking waiting area is arranged between the displacement left-turn lane and the inlet straight lane and on one side close to the main signal intersection;
a left-turn non-motor vehicle one-way lane of a south entrance is arranged between a straight-going motor vehicle running track of the west entrance and a left-turn motor vehicle running track of a south entrance released in the same phase in the center of a main signal intersection of a parallel flow intersection, and the left-turn non-motor vehicle one-way lane of the south entrance is connected to a left-turn non-motor vehicle secondary parking waiting area positioned at the west entrance;
in the center of a main signal intersection of the parallel flow intersection, a left-turn non-motor vehicle one-way lane of a north entrance is arranged between a straight-going motor vehicle running track of the east entrance and a left-turn motor vehicle running track of the north entrance released in the same phase, and the left-turn non-motor vehicle one-way lane of the north entrance is connected to a left-turn non-motor vehicle secondary parking waiting area positioned at the east entrance;
a left-turn non-motor vehicle one-way lane of an east entrance is arranged between a straight motor vehicle running track of the south entrance and a left-turn motor vehicle running track of the east entrance released in the same phase in the center of a main signal intersection of a parallel flow intersection, and the left-turn non-motor vehicle one-way lane of the east entrance is connected to a left-turn non-motor vehicle secondary parking waiting area positioned at the south entrance;
in the center of a main signal intersection of the parallel flow intersection, a left-turn non-motor vehicle one-way lane of a west entrance is arranged between a straight-going motor vehicle running track of the north entrance and a left-turn motor vehicle running track of the west entrance released in the same phase, and the left-turn non-motor vehicle one-way lane of the west entrance is connected to a left-turn non-motor vehicle secondary parking waiting area positioned at the north entrance;
the signal control specifically comprises:
the main signal motor vehicle is controlled by two phase signals, wherein the two phases are a combined phase formed by east-west direct driving and south-north left turning and a combined phase formed by south-north direct driving and east-west left turning respectively;
when the phase green light of the main signal motor vehicle displays east-west direct movement and south-north left turning, the non-motor vehicles turning left to south and north run to a left-turning non-motor vehicle secondary parking waiting area from the safety island through the left-turning non-motor vehicle one-way lane; when the green lamp of the main signal motor vehicle phase displays the south-north straight driving and the east-west left turning, the south-north left turning non-motor vehicle of the previous phase drives to the roadside safety island from the left turning non-motor vehicle secondary parking waiting driving area through the intersection non-motor vehicle crosswalk;
when the main signal motor vehicle phase green light displays that the vehicle goes straight in the south and north and turns left east and west, the non-motor vehicles turning left east and west travel from the safety island to the non-motor vehicle secondary parking waiting area through the non-motor vehicle one-way lane turning left, and when the main signal motor vehicle phase green light displays that the vehicle goes straight in the east and west and turns left in the south and north, the non-motor vehicles turning left in the last phase travel from the non-motor vehicle secondary parking waiting area turning left to the roadside safety island through the non-motor vehicle crossroad.
2. The method for the oblique-plug type crossing of the left-turn non-motor vehicle at the parallel flow intersection according to claim 1, wherein the capacity of the secondary parking waiting area of the left-turn non-motor vehicle meets the following conditions:
in the formula: n is a radical ofmaxFor left-turning non-motor vehicle secondary parking waiting areaThe number of the non-motor vehicles which can be accommodated is in units of vehicles; mu is the flow fluctuation coefficient of the non-motor vehicle; c is the signal period duration, and the unit is second;
for left turn non-motor traffic demand, the units are vehicles/second.
3. The method for the crossroad left-turn non-motor vehicle obliquely-inserted crossing according to claim 2, wherein the process that the left-turn non-motor vehicle runs from the safety island to the left-turn non-motor vehicle secondary parking waiting area through the left-turn non-motor vehicle one-way lane is the first stage, and the time required for the left-turn non-motor vehicle to complete the first stage meets the condition that: the time required for the non-motor vehicle to turn left to complete the first phase is not more than the phase time of the motor vehicle;
in the formula: l is1The length of a running track from a safety island to a left-turning non-motor vehicle to a secondary parking waiting area is the length of the running track in meters;
the running speed of the non-motor vehicle is left-turning, and the unit is meter/second;
in the first stage, the saturation flow rate of a traffic area between a safety island and a secondary parking waiting area of the left-turning non-motor vehicle is measured in units of vehicles per second;
the unit is the phase time of the motor vehicle in the first phase.
4. The method for the crossroad left-turn non-motor vehicle obliquely-inserted crossing according to claim 3, wherein the process that the left-turn non-motor vehicle drives to the roadside safety island from the left-turn non-motor vehicle secondary parking waiting area through the crossroad non-motor vehicle crossroads is the second stage, and the emptying time of the left-turn non-motor vehicle secondary parking waiting area meets the following constraint:
in the formula: l is2The length of a running track from a left-turn non-motor vehicle secondary parking waiting area to a safety island in the second stage is the length of the running track in meters;
the saturation flow rate of a passing area between a left-turning non-motor vehicle secondary parking waiting area and a roadside safety island in the second stage is the unit of vehicle/second;
the phase time of the vehicle in the second stage is the unit of second.
5. The method for a left-turn non-motor vehicle obliquely-inserted crossing at a parallel flow intersection according to claim 4, wherein the parallel flow intersection is a parallel flow intersection with a left turn and a left set, a left set or a right set.
6. The method for the oblique-insertion type crossing of the non-motor vehicle at the left turn of the parallel flow intersection comprises traffic geometric design and signal control, and is characterized in that the traffic geometric design specifically comprises the following steps:
for each inlet of the parallel flow intersection, a shift left-turn non-motor vehicle lane is arranged between the shift left-turn motor vehicle lane and the inlet straight-through vehicle lane, one side of the shift left-turn non-motor vehicle lane, which is close to the main signal, is called the head end of the shift left-turn non-motor vehicle lane, and one side of the shift left-turn non-motor vehicle lane, which is close to the pre-signal, is called the tail end of the shift left-turn non-motor vehicle lane;
a left-turn non-motor vehicle one-way lane of a south inlet is arranged between a straight-going motor vehicle running track of the west inlet and a left-turn motor vehicle running track of the south inlet in the center of a main signal intersection of the parallel flow intersection, one end of the left-turn non-motor vehicle one-way lane of the south inlet is connected with the head end of a displacement left-turn non-motor vehicle lane positioned at the west inlet, and the other end of the left-turn non-motor vehicle one-way lane of the south inlet is connected with a safety island;
a left-turn non-motor vehicle one-way lane of a north entrance is arranged between a straight motor vehicle running track of the east entrance and a left-turn motor vehicle running track of the north entrance in the center of a main signal intersection of a parallel flow intersection, one end of the left-turn non-motor vehicle one-way lane of the north entrance is connected with the head end of a displacement left-turn non-motor vehicle lane positioned at the east entrance, and the other end of the left-turn non-motor vehicle one-way lane of the north entrance is connected with a safety island;
a left-turn non-motor vehicle one-way lane of an east inlet is arranged between a straight motor vehicle running track of a south inlet and a left-turn motor vehicle running track of the east inlet in the center of a main signal intersection of a parallel flow intersection, one end of the left-turn non-motor vehicle one-way lane of the east inlet is connected with the head end of a displacement left-turn non-motor vehicle lane positioned at the south inlet, and the other end of the left-turn non-motor vehicle one-way lane of the east inlet is connected with a safety island;
a left-turn non-motor vehicle one-way lane of a west inlet is arranged between a straight motor vehicle running track of the north inlet and a left-turn motor vehicle running track of the west inlet in the center of a main signal intersection of a parallel flow intersection, one end of the left-turn non-motor vehicle one-way lane of the west inlet is connected with the head end of a displacement left-turn non-motor vehicle lane positioned at the north inlet, and the other end of the left-turn non-motor vehicle one-way lane of the north inlet is connected with a safety island;
arranging a transverse left-turn non-motor vehicle lane from the tail end of the left-turn non-motor vehicle lane to the roadside in a direction perpendicular to the exit lane at the pre-signal position of the parallel flow intersection;
the signal control specifically comprises:
at the main signal position, the main signal motor vehicle is controlled by two phase signals, namely a combined phase formed by east-west direct driving and south-north left turning and a combined phase formed by south-north direct driving and east-west left turning;
when the green light of the phase of the main signal motor vehicle displays east-west direct movement and south-north left turning, the south-north left turning non-motor vehicle runs to a pre-signal position from the safety island through the left turning non-motor vehicle one-way lane and the shifting left turning non-motor vehicle lane, the process is a first stage, and then the vehicle stops waiting or passes through the transverse left turning non-motor vehicle lane according to the indication of the pre-signal left turning non-motor vehicle signal light, and the process of passing through the transverse left turning non-motor vehicle lane is a second stage; when the east-west straight-driving motor vehicles display red light at the pre-signalized intersection control signal lamp on the east-west entrance road section, the south-north left-turning non-motor vehicles select one section of time length
Green light is released as a second stage, and the signal light of the exit straight lane is controlled to display red light at the stage;
when the phase green light of the main signal motor vehicle displays the south-north straight driving and the east-west left turning, the east-west left turning non-motor vehicle runs to a pre-signal position from the safety island through the left turning non-motor vehicle one-way lane and the shifting left turning non-motor vehicle lane, and then stops for waiting or passes through the transverse left turning non-motor vehicle lane according to the indication of the pre-signal left turning non-motor vehicle signal light; when the south-north straight-going motor vehicles display red light at the pre-signalized intersection control signal lamp on the south-north entrance road section, selecting one section of time length t from the east-west left-turning non-motor vehicles2 bAnd a green light is released as a second stage, and the stage controls the signal light of the exit straight lane to display a red light.
7. The method for the oblique-plug type crossing of the left-turn non-motor vehicle at the parallel flow intersection according to claim 6, wherein the capacity of the left-turn non-motor vehicle lane shifting meets the following conditions:
in the formula: n is a radical ofmaxThe number of non-motor vehicles which can be accommodated for shifting the left-turning non-motor vehicle lane is in units of vehicles; mu is non-motor vehicle flow fluctuationA coefficient; c is the signal period duration, and the unit is second;
for left turn non-motor traffic demand, the units are vehicles/second.
8. The method for the oblique-plug type crossing of the left-turn non-motor vehicle at the parallel flow intersection according to claim 7, wherein the time required for the left-turn non-motor vehicle to pass through the main signalized intersection in the first stage is not more than the phase duration of the motor vehicle, and the specific conditions are as follows;
in the formula: l is1The length of a running track of a left-turn non-motor vehicle from a safety island to the head end of a left-turn non-motor vehicle lane in a first stage is meter;
the running speed of the non-motor vehicle is left-turning, and the unit is meter/second;
in the first stage, the saturation flow rate of a traffic area between the safety island and the head end of the left-turning non-motor vehicle lane is measured in units of vehicles per second;
the phase time of the motor vehicle in the first phase is in seconds;
the left-turn non-motor vehicle is calculated as follows in the second stage release phase duration:
in the formula:
releasing the phase time of the non-motor vehicle for the left turn at the second stage, wherein the unit is second; l is2The length of a transverse left-turning non-motor vehicle lane for the left-turning non-motor vehicle in the second stage is measured in meters;
the lateral left turn lane saturation flow rate for the left turn non-motorized vehicle in the second phase is in units of vehicles/second.
9. The method of claim 8, wherein the crosswalk is a crosswalk with left turn left set, center set, or right turn left set.
10. The system for the oblique-plug type crossing of the non-motor vehicle at the left turn of the parallel flow intersection is characterized by being used for executing the oblique-plug type crossing method of the non-motor vehicle at the left turn of the parallel flow intersection, wherein the method comprises the following steps of 1 to 9.
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