CN102194314B - Method and road facilities for maximizing traffic flow - Google Patents

Method and road facilities for maximizing traffic flow Download PDF

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Publication number
CN102194314B
CN102194314B CN 201010122375 CN201010122375A CN102194314B CN 102194314 B CN102194314 B CN 102194314B CN 201010122375 CN201010122375 CN 201010122375 CN 201010122375 A CN201010122375 A CN 201010122375A CN 102194314 B CN102194314 B CN 102194314B
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road
vehicle flowrate
maximum
speed
maximum vehicle
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CN102194314A (en
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方福德
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Abstract

The invention discloses a method and road facilities for maximizing a traffic flow. The method comprises the following steps of: unifying speed of the vehicles traveling on the section of a road carrying out the method for maximizing the traffic flow as maximal restricted speed set for the section of the road; unifying a minimal spacing under the condition of ensuring safety, i.e. corresponding the minimal safe braking distance between a front vehicle and a rear vehicle with unified speed; and setting the relationship between the minimal safe braking distance of the front vehicle and the rear vehicle and the maximal restricted speed, and the road facilities for maximizing the traffic flow according to the following formulae: the minimal safe braking distance Lm= vm*[(t1+(tb-ta)+(t''b-t''a))] (formula 1), the unified minimal spacing Sm=Lm= vm*[(t1+(tb-ta)+(t''b-t''a))] (formula 2); and the facilities are as follow: on the road carrying out maximization of the traffic flow, all lanes are provided with movable lane separating columns for inhibiting lane-changing of the vehicles; range markers are arranged along the road, so that drivers can perceive a spacing; traffic lights and photoelectric sensing delay switches are arranged every 20-30 meters on all sections of the road; and timeshare shunt traffic lights are arranged at a junction of the lanes on the road carrying out synchronous traveling. Thus, the traffic flow can be ensured to be maximized, thereby ensuring road smoothness during the rush hour.

Description

Maximum vehicle flowrate method and road equipment
Technical field
The present invention relates to method and road equipment that road traffic realizes that the big flow of vehicle is current, especially a kind of maximum vehicle flowrate method and road equipment.
Background technology
The vehicle that travels on the road all is that the single vehicle freedom is independently travelled at present, except top speed limits, and the unified speed of a motor vehicle and unified spacing, just the vehicle of entire road does not have implementation to travel synchronously.Vehicle is wanted to walk and many how slow is just walked slowly, just how far wants every to cause car more many just more random every more many, and that just leans between more random car and the car is more near, and that leans between the car is more near, and " step " just " steps " and do not open, and the road is just more stifled, and the road is more stifled, and vehicle flowrate is just more little.Need the more big time of vehicle flowrate in that car more more like this, because vehicle is advanced and is in disordered state and do not carry out synchronously, flow is also more little on the contrary.China's economic is just being located the flourish stage at present, and automobile quantity 1 year increases tired with several ten million speed.Urban road is the construction in Urban Bridge, tunnel particularly, lags far behind gathering way of vehicle, causes long large tracts of land traffic congestion, has had a strong impact on life, work, the trip of urban human, has influenced economic normal development.
Summary of the invention
The invention provides a kind of maximum vehicle flowrate method and road equipment, purpose is that this method of enforcement and all vehicles of advancing of facility highway section are carried out same maximum speed limit and the forward and backward unified minimum spacing of maximum safety that keeps of vehicle travels synchronously, purpose is to realize speed of a motor vehicle maximum, spacing minimum, vehicle flowrate maximum under the premise that security is guaranteed, to improve road section capacity, to guarantee operate as normal, the studying and living of urban human.
Maximum vehicle flowrate method of the present invention is:
The speed of a motor vehicle of unified these all traveling vehicles of highway section i.e. the maximum speed limit of original this highway section setting; Guarantee unified minimum spacing, the i.e. minor increment of the front and back car safety shut-down of the corresponding unified speed of a motor vehicle under the safety condition; The minor increment of front and back car safety shut-down and arranging according to following mode of the relation of maximum speed limit and maximum vehicle flowrate road equipment are carried out:
The minimum spacing Lm=vm of safety shut-down * [(t1+ (tb-ta)+(t " b-t " a)] (1 formula) is set
Unified minimum spacing Sm=Lm=v is set m* [(t 1+ (t b-t a)+(t " b-t " a)] (2 formula)
In the formula: v mBe maximum speed limit
t 1Be driver's reaction time, 0.3-1.0 second
t bBe the back car braking gap make-up time
t aBe the front truck braking gap make-up time
T " bFor the back car is braked rise time
T " aFor front truck is braked rise time
Lm is the minimum spacing of safety shut-down
Sm is unified minimum spacing
Generally speaking, (t b-t a), (t " b-t " aThe t of)<< 1, can ignore, 2 formulas become
S m=L m=v M* t 1(3 formula)
T in 3 formulas 1Relevant with driver's quality, can between 0.8 second-1.2 seconds, determine with different control roads that according to different regions the road that general lorry passes through will be set bigger by fibrous root, the road that only allows car to pass through can be set smaller.
The maximum vehicle flowrate Q=V of bicycle road type car M/ (S m+ M), ignoring t b, t a, t " b, t " aUnder the situation,
Q=1/ (t 1+ M/v m) (4 formula)
M is length of wagon in 4 formulas
The maximum vehicle flowrate Q of bicycle road type car is by driver's reaction time t 1, length of wagon M and Maximum speed limit v MDetermine, in road vehicle travels road equipment and method for synchronous synchronously, because driver's reaction time t 1With length of wagon M be objective factor, Maximum speed limit v MMore big, cart vehicle flowrate Q is just more big.Maximum speed limit v MShould determine according to the slip attachment coefficient on road surface.
Maximum vehicle flowrate road equipment of the present invention is to increase following technique measures on the basis of ordinary road:
1, implementing on the road of maximum vehicle flowrate method, all tracks arrange mobilizable track box stall, forbid vehicle lane change (after implementing synchronously, vehicle need not lane change be overtaken other vehicles);
2, implementing along the road range marker to be set on the road of maximum vehicle flowrate method, allowing driver's perception spacing;
3, on the road of implementing maximum vehicle flowrate method, speed of a motor vehicle monitor and control facility is set, monitoring vehicle speed along the road; The system-wide section arranges traffic lights and optoelectronic induction delay switch between 15 to 30 meters, delay duration is: long vehicle height degree/synchronous speed, and the induction delay switch has only two states, and a kind of is that red light closes green light and opens, and a kind of is the red light pass of giving the green light;
4, on the road of implementing maximum vehicle flowrate method, the track meet arranges the timesharing shunting traffic lights;
5, implementing on the road of maximum vehicle flowrate method, do not having current control in 1 to 2 kilometer in the front and back of implementing maximum vehicle flowrate highway section, not so two flow little in the middle of flow very much not get up.
Technical solutions according to the invention are travelled and have been guaranteed the driving order, implement the maximum vehicle flowrate speed of a motor vehicle for the Maximum speed limit in this highway section, unified spacing are the safety shut-down distance of corresponding Maximum speed limit, guarantee the vehicle flowrate maximum, The coast is clear during with assurance wagon flow peak.
Description of drawings
Fig. 1 is Electronic Control synoptic diagram on the synchronous travel of enforcement,
Fig. 2 is means of transportation position figure on the synchronous travel of enforcement,
Road meet green light lamp arranges planimetric map to Fig. 3 on the synchronous travel in order to implement.
Among the figure, 2-jube post, 3-range marker, 4-shunting traffic lights, 5-photoelectric sensor switch, the synchronous travel of 6-, 7-traffic lights, KT1-delay switch, D-diode, J1-Jn, J are blocked in the separation of 1-track.Contactor.
Embodiment
The maximum vehicle flowrate road equipment of a kind of enforcement increases following technique measures on the basis of ordinary road:
A, implementing on the maximum vehicle flowrate road 6, all tracks arrange mobilizable track box stall 1, forbid the vehicle lane change;
B, implementing on the maximum vehicle flowrate road range marker 3 to be set along the road, range marker 3 can also can be pointed out Sign Board for the roadside for apply colour band on ground, allows driver's perception spacing;
C, implementing speed of a motor vehicle monitor and control facility to be set, monitoring vehicle speed along the road on the maximum vehicle flowrate road; The system-wide section arranges traffic lights 7 and optoelectronic induction delay switch 5 between 20 to 30 meters, delay duration is: long vehicle height degree/synchronous speed, the induction delay switch has only two states, a kind of is that red light pass green light is opened, a kind of is the red light pass of giving the green light, each responds to the delay switch control red light that all is connected in parallel, any one switch connection red light will be bright, the electromagnetic induction switch coil of control green light is in parallel with red light, green light extinguished when red light was connected, during vehicle process optoelectronic induction delay switch, blocked light, the action of optoelectronic induction delay switch trigger, if time-delay is still kept off to light, switch motion, all red lights of accident vehicle back are bright on this track along the line, and follow-up vehicle maintains safe distance and stops synchronously on the spot.Physical circuit shows existing expression in the Electronic Control synoptic diagram on the synchronous travel at Fig. 1, as accompanying drawing 1, by photoelectric sensor switch 5 control delay switch KT, delay switch KT control contactor J, all contactor normally closed interlock control green lights are connected on the circuit, normally open contact control red light also is connected in parallel on the circuit, the one end is in parallel with a normally closed interlock, the other end is connected in parallel on the unidirectional power lead of direct current on, each group traffic lights 7 corresponding a pair of photoelectric sensor switch 5, a delay switch KT1, contactor J, a diode D.The contrary garage of direct supply direction inserts.In case certain car surpasses time-delay length through the photoelectric sensor switch time on the track, this position delay switch KT action, contactor coil J energising in this position is the contactor action, at this moment all green light circuit of traffic congestion back, position disconnect the connection of red light circuit on this track, be that all green lights of back extinguish red light and light, stop synchronously on the spot to indicate follow-up vehicle.
D, implementing on the maximum vehicle flowrate road, the track meet arranges timesharing shunting traffic lights 4;
5, implementing on the maximum vehicle flowrate road, do not having current control in 1 to 2 kilometer in the front and back in highway section synchronously.
To be example in Wuhan Yangtze River Bridge enforcement the present invention, illustrate that application of the present invention can reach maximum vehicle flowrate.
One, determine to implement the length that the present invention needs control section, the longer the better for control section, and too weak point can get lodged in two, and middle vehicle flowrate very much not gets up.The two ends control starting point of Wuhan Yangtze River Bridge should be located near the Qin Tai of Hanyang respectively and the big east gate in Wuchang or farther place;
Two, because Wuhan Yangtze River Bridge is unidirectional two-way traffic, and the track is less, support vehicles to advance in order synchronously, the two ends cross street must be carried out regularly shunting in junction Yangtze Bridge porch;
Three, the present Maximum speed limit V limit of Wuhan Yangtze River Bridge is 50km/ hour, and all must be controlled at 50km/ hour by the speed of a motor vehicle of bridge under the normal condition;
Four, under normal circumstances, all must protect special S by the minimum spacing of big bridge vehicle m=v M* t 1, t 1Got minimum spacing S 1 second m=16.67m/s * 1s=16.67m is set to 18 meters.18 meters is minimum spacings, and under the prerequisite that keeps the unified speed of a motor vehicle, actual vehicle flowrate is during less than maximum vehicle flowrate, and spacing is naturally just greater than minimum spacing.
Five, the system-wide section arranges traffic lights and photoelectric sensor switch between 20 to 30 meters, in case the car of front stops because of the traffic fault, photoelectric sensor switch moves, and the accident vehicle back is bright along the road red light, and follow-up vehicle maintains safe distance and stops on the spot.Every about 50 meters, speed measuring device is set, to monitoring along road vehicles.A range mark is set every about 18 meters, allows driver's perception spacing.
Wuhan Yangtze River Bridge is implemented vehicle travel synchronously road equipment and method for synchronous, one-lane maximum vehicle flowrate
Qm=1/(1+M/16.7),
Be example with the car, M is 4.5 meters, and Qm is 2835/hour.Unidirectional two-way traffic flow is 5670/hour.

Claims (5)

1. maximum vehicle flowrate method is characterized in that:
Be unified in the speed of a motor vehicle of all traveling vehicles on the maximum vehicle flowrate method of the enforcement highway section and be the maximum speed limit of this highway section setting; Guaranteeing unified minimum spacing, the i.e. minor increment of the front and back car safety shut-down of the corresponding unified speed of a motor vehicle under the safety condition; The minor increment of front and back car safety shut-down and arranging according to following mode of the relation of maximum speed limit and maximum vehicle flowrate road equipment are carried out:
The minimum spacing Lm=vm of safety shut-down * [(t1+ (tb-ta)+(t " b-t " a)] (1 formula) is set
Unified minimum spacing Sm=Lm=v is set m* [(t 1+ (t b-t a)+(t " b-t " a)] (2 formula)
In the formula: v mBe maximum speed limit
t 1Be driver's reaction time, 0.3-1.0 second
t bBe the back car braking gap make-up time
t aBe the front truck braking gap make-up time
T " bFor the back car is braked rise time
T " aFor front truck is braked rise time
Lm is the minimum spacing of safety shut-down
Sm is unified minimum spacing
2. maximum vehicle flowrate method according to claim 1 is characterized in that:
Generally speaking, (t b-t a), (t " b-t " aThe t of)<< 1, can ignore, 2 formulas become
S m=L m=v M* t 1(3 formula)
T in 3 formulas 1Relevant with driver's quality, can between 0.8 second-1.2 seconds, determine with different control roads that according to different regions the road that general lorry passes through will be set bigger by fibrous root, the road that only allows car to pass through can be set smaller.
3. maximum vehicle flowrate method according to claim 1 is characterized in that: the maximum vehicle flowrate Q=V of bicycle road type car M/ (S m+ M), ignoring t b, t a, t " b, t " aUnder the situation,
Q=1/ (t 1+ M/v m) (4 formula)
M is length of wagon in 4 formulas.
4. maximum vehicle flowrate method according to claim 1 is characterized in that: implementing on the maximum vehicle flowrate method road, do not having current control in 1 to 2 kilometer in the front and back in this highway section.
5. implement maximum vehicle flowrate road equipment for one kind, it is characterized in that: in the increase of the basis of ordinary road following facility is set:
A, implementing on the maximum vehicle flowrate road, all tracks arrange mobilizable track box stall, forbid the vehicle lane change;
B, implementing along the road range marker to be set on the maximum vehicle flowrate road, allowing driver's perception spacing;
C, implementing speed of a motor vehicle monitor and control facility to be set, monitoring vehicle speed along the road on the maximum vehicle flowrate road; The system-wide section arranges traffic lights and optoelectronic induction delay switch between 20 to 30 meters, delay duration is: long vehicle height degree/synchronous speed, the induction delay switch has only two states, a kind of is that red light pass green light is opened, a kind of is the red light pass of giving the green light, each responds to the delay switch control red light that all is connected in parallel, any one switch connection red light will be bright, the electromagnetic induction switch coil of control green light is in parallel with red light, green light extinguished when red light was connected, during vehicle process optoelectronic induction delay switch, blocked light, the action of optoelectronic induction delay switch trigger, if time-delay is still kept off to light, switch motion, all red lights are bright on this track along the line, and follow-up vehicle maintains safe distance and stops synchronously on the spot;
D, implementing on the maximum vehicle flowrate road, the track meet arranges the timesharing shunting traffic lights.
CN 201010122375 2010-03-08 2010-03-08 Method and road facilities for maximizing traffic flow Expired - Fee Related CN102194314B (en)

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CN108351219B (en) 2016-02-26 2020-09-11 华为技术有限公司 Traffic control method and device
CN109544946B (en) * 2019-01-03 2021-09-28 南京城建隧桥经营管理有限责任公司 Tunnel real-time monitoring management system based on traffic flow big data and implementation method thereof

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