WO2005109370A1

WO2005109370A1 - A method for designing traffic sign of city road

Info

Publication number: WO2005109370A1
Application number: PCT/CN2005/000628
Authority: WO
Inventors: Baowen Huang; Zhengjun Huang
Original assignee: Baowen Huang; Zhengjun Huang
Priority date: 2004-05-11
Filing date: 2005-05-08
Publication date: 2005-11-17

Abstract

A method for designing traffic sign of city road, involves defining a time as a green light starting time at an opposite direction of a crossing, and setting the green light starting time of the next crossing based on the time to arrive the next crossing by a measured proper traveling speed. Calculating and measuring the green light starting time of every crossing in turn, and adding a time of green light period repeatedly. A traffic sign placed in proper position of the road is designed to show a proper traveling speed to arrive to the next crossing, to prompt that the next crossing is green light to drive at that speed. The traffic sign according to the invention can improve traffic condition of a city.

Description

Design method of urban road traffic signal device

The invention relates to a design method of an urban road traffic signal device.

Background technique

In 1858, traffic lights were born in the main streets of London, England. Since then, urban road signal lights have become an important facility for cities around the world to divert traffic and maintain traffic order. Red light on, green light Light is a traffic rule that every motor vehicle, non-motor vehicle and every pedestrian must strictly abide by. At present, the setting of lighting time for urban road traffic lights is unreasonable. The performance is as follows: 1 The setting of many red and green lights does not start from the overall situation of the whole city. The lighting time of two adjacent lights is inextricably linked. In the state of "individual politics" and lighting "no appointment". In this way, the red and green lights are constantly changing, but the traffic frequently encounters red lights. It has been observed that a car is parked at a junction due to a red light, and the green light is turned in a straight direction. It takes only 30 seconds to reach the next intersection, and the red light is often encountered. This phenomenon is also often seen on the main roads of traffic in urban areas. 2 The difference in signal period of each intersection signal light makes the green light start time of adjacent intersections uncoordinated. In particular, the difference in signal periods between adjacent intersections (some of which are also very different) makes it more necessary to encounter red lights on the train. For example, in a road junction signal cycle, the setting time of the straight traffic light is 40 seconds, passing through more than 40 vehicles; the timing of the next intersection signal cycle, setting the light time of the straight traffic is 30 seconds, through More than 30 vehicles. In this way, it is too late to pass the train to the station even if it just happens to be green. A vehicle that fails will only wait for the green light of the next cycle.

In short, the current urban road traffic signal control, so that the relative direction of the intersection is a red light, there will be more vehicles due to red light and stay. ,

At present, the urban area generally only sets the speed limit sign for driving on special road sections for the purpose of safety. The distance between each section of the intersection is different, and the road conditions are different. The speed of the journey and the time taken to reach the next intersection should also be different. However, the current urban road lacks a traffic sign indicating that the information is displayed. · In addition, at the same time, enter a line of roads.. Cars, when going to the next road-port, some may go straight, some may turn left or right, the time to the green light at the intersection is different, but due to lack of relevant The traffic sign indicating the information, the driver does not know the information from the intersection to the next intersection, only to refuel, but often rushed to the next intersection, the red light "light you did not discuss." If urban roads, traffic, traffic safety facilities and signs are regarded as a large machine, urban roads lack traffic signs with informational reminders, just as this machine lacks an important limit. In the 1960s, foreign countries began to raise the issue of intelligent transportation. Since the 1980s, intelligent transportation has begun to be implemented in the United States, Japan, and European countries. Traffic signal control is an important part of intelligent transportation. At present, the urban road traffic signal control adopted in the world, the lighting time is controlled by computer intelligence, that is, the computer changes the traffic flow information provided by the vehicle detector, and automatically adjusts the control period of the traffic signal and the length of the green light in real time, so that After the traffic encounters a green light at an intersection, the subsequent intersections are also green ("green wave"). China's intelligent transportation is in the initial stage. At present, some cities in China spend huge sums of money to introduce intelligent transportation systems or technologies from abroad. The signal control system is not suitable for the actual situation of urban road network traffic, road conditions and traffic forms in China. For example, the intersections are unevenly distributed, and most of them are not one-way streets. Many roads are mixed vehicles and non-motor vehicles. Therefore, the roads that can be implemented are limited, and: 1 The roads that are implemented cannot be "green waves" for each traffic flow; 2 When the traffic "green waves" in one direction passes, the vehicles in the cross direction will still meet red. Lights and other cars. 3 Since many roads cannot implement such a signal control system, it will result in the implementation of the junctions that have been implemented and not implemented. The signal cycle will have a large difference, so that the vehicles at the intersections will not be able to clear the space during the green time, or the vehicles will be generated in a certain section. Increase, causing poor traffic or blockage.

Because the traffic signal control is unscientific, the guidance is not good, and the urban roads frequently encounter red lights, causing various hazards and hidden dangers: 1 causing poor traffic, increasing road traffic load, easily causing traffic accidents or congestion; 2 frequent braking, Start-up, sudden fueling, vehicle wear and tear, fuel consumption, power consumption; 3 noise and vehicle exhaust emissions increase, increase traffic pollution; 4 waste people's precious time, many have also been wrong; 5 is also easy for drivers to produce Irritable emotions, resulting in unsafe factors such as green light, red light, driving fast, overtaking, and creating a vicious circle, making the traffic order more chaotic; 6 seriously damaging the image of the city, causing losses in the investment environment, automobile consumption and the development of the automobile industry.

Summary of the invention

The object of the present invention is to provide a method for designing an urban road traffic signal device, and the urban road traffic signal device set by the method is advantageous for ensuring smooth traffic in the urban area.

In order to achieve the above object, the design method adopted by the present invention comprises a traffic sign and its setting, characterized in that it comprises the following steps:

(1) Setting traffic light fixtures at all relevant traffic intersections;

' (2) Determine the distance between each two adjacent intersections, set the speed at which the road is driven, and the travel time required to reach the next intersection from one intersection at that speed;

(3) Determine the "green light cycle" of the intersection signal light; (4) Select a junction such as a junction as the starting point, determine the green light start time of a time direction, intersection direction and ΒΑ direction within 24 hours a day, and set each time to change the "green light cycle" to make it one day. Repeatedly change the green light start time in 24 hours;

(5) Start the green light in the four directions with the intersection ^, and add the relevant roads to the intersection (1), the intersection (- 1), the intersection 0+1, and the intersection-l. The driving time, respectively set the green light start time of the next intersection (1), intersection (-1), intersection 0+1, intersection Ol, and set each time a "green light cycle" change, so that It is time to change the green light start time in 24 hours a day;

(6) From any intersection to the next intersection, the time of the green light of the intersection plus the driving time set by the intersection to the next intersection is the green light starting time of the next intersection.

Compared with the prior art, the application of the design method of the invention makes the time control of the urban road traffic signal device more regular and more accurate, thereby facilitating the vehicle to pass in time during the green time, avoiding or reducing the redness at the intersection. The lights are stranded to ensure the smooth flow of urban traffic, improve road utilization, and reduce traffic pollution, traffic accidents and transportation costs.

DRAWINGS

Figure 1 is a partial road map of the urban area. In the figure, AB, CD, EF, GH, etc. are roads, ◊, (1), (2), (3), (-1), (-2), (-3), +l, +2 ◊-1 , ◊— 2, (1+1), (1+2), (1–1), (1–2), (—1+1), (-1+2), (—1—1), · (—1—2), (2+1), (2+2), (2—1), (2-2), (-2-1), (-2-2), (-3+ 1), (-3-1), etc. are all intersections with signal lights.

Figure 2 is a traffic sign indicating the speed of driving to the left.

Figure 3 is a traffic sign indicating the speed of driving to the left and right.

' Figure 4 is a traffic sign that prompts the car to turn left, go straight, and turn right.

Detailed ways

The present invention will be described in detail below with reference to the embodiments. The specific method steps are as follows:

1. Set traffic signal devices at all relevant traffic intersections;

2. Measure the distance between the road segments between the two adjacent intersections (the stop line of the upper and lower intersections in each direction of the previous section is the distance, or the middle line of the above two intersections is the distance), according to the actual situation of the road section , the exact driving speed for accurately determining the distance of each road section and the driving time at which the green light starts to light from the green light of one intersection to the green light of the next intersection;

3. Determine the relative direction of each intersection "the time from the start of the green light to the start of the light after the light is turned off" (referred to as the "green light cycle". The "green light cycle" includes the direction of the straight line or the relative direction of the cross from the green light. Left and right turn lights, yellow lights, red lights, etc. until the green light starts to light again). The "green light cycle" can be determined as 1 minute 40 seconds, 1 minute 30 seconds, 1 minute 20 seconds, 1 minute, 30 seconds, and the like. The "green light cycle" of this embodiment is determined to be 1 minute;

4. Take a road on a road in the urban area (usually on the main road of traffic) as the starting point. For example, take the road ◊ as the starting point (see Figure 1), and determine a time for the intersection in the 24 hours a day. The green light of the direction starts to light up, and it is set to change once every "green light cycle", so that it changes the green light start time repeatedly in 24 hours a day. If it is set to 7 o'clock positive, and repeatedly add "green light cycle" (1 minute), then the green light start time of the intersection direction and the BA direction is changed every 1 minute, that is, 7:1 start light, 7:2 The highlight is 24 hours a day, and so on;

5, at the intersection of 7 points plus the measured arrival intersection (1) the appropriate driving speed to use the driving time, set the intersection (1) green light start time. For example, the intersection of the intersection and the intersection (1) is 1.26km, and the appropriate driving speed is 48 km/h. (The speed of deceleration before passing through the intersection and reaching the stop at the next intersection is uneven. The same applies) 1 minute and 30 seconds to arrive (including the deceleration time before passing the intersection and reaching the next road and stopping the line. The same below), then the green light of the AB direction and the BA direction of the intersection (1). is 7:1:30. Seconds, repeatedly add "green light cycle" (1 minute), then the intersection (1) green light start time is changed every 1 minute, that is, 7:2:30, light starts, 7:3:30 starts day 24 hours and so on;

6. Intersection 0 to (- 1), at the intersection 07, plus the measured travel time of the appropriate intersection (-1), set the intersection (-1) AB direction and BA direction green light start time. For example, when measuring the intersection 0 to (-1), the suitable driving speed is 39 km/hv. If it arrives in 1 minute, the intersection (-1) AB direction and the BA direction green light start time is 7:1, and the "green light" is added repeatedly. Cycle "(1 minute), then the intersection (-1) AB direction and the BA direction green light start time is changed every 1 minute, that is, 7:2 start light, 7:3 start light 24 hours a day, and so on ;

' 7. The "green light cycle" is divided equally for 1 minute (may not be evenly divided, such as setting 40 seconds in one direction and 20 seconds in one direction), then the direction of the intersection and the direction of the BA are straight and turn left and right. The green light transit time is from 7:00 to 7:30. The green light on the OCD and DC directions at the intersection is 7:30, and the "green light cycle" (1 minute) is added repeatedly. Then the intersection direction and DC direction The green light starts to change every 1 minute, that is, 7:1:30, and 7:30:30, 24 hours a day, and so on;

8. If the road speed is 0 to 0+1 and the suitable driving speed is 35 km/h, it takes 1 minute and 20 seconds to arrive. The traffic starts from 07:30 and 30 seconds, and the green light starts to light, and the intersection is 0+1. 1 point 50 Second, that is, the time is set to the green light start time of the intersection, and the "green light cycle" (1 minute) is added repeatedly, then the green light start time of the intersection O+l CD direction and the DC direction is changed every 1 minute. , that is, 7:1:50, it starts to light, 7:2:50, it starts to light up, , , , , 24 hours a day, and so on. However, the driving of the intersection +1 to ^ can only take 1 minute and 10 seconds to just meet the green light of the intersection. If the driving speed is 1 minute and 10 seconds, the driving time should be plus or minus. Drop a "green light cycle" (1 minute). The setting of the green light start time is applicable to the road sections between the two intersections that should travel at different speeds due to road conditions.

9. If the intersection is 0 to 0-1 to measure the appropriate driving speed, it takes 1 minute to arrive, then the traffic starts from 07:30 and 30 seconds, and the green light starts to light, and the intersection ◊-1 is 7:1:30. , that is, the 1CD direction and the DC direction of the intersection are set to the green light start time, and the "green light cycle" (1 minute) is repeatedly added, and the green light start time of the intersection Ol CD direction and the DC direction is changed every 1 minute. Once, it starts at 7:2:30, starts at 7:3:30, 24 hours a day, and so on. '

The above is the setting method of the green light start time in the four directions of the intersection ^ and the green light start time of the first intersection in the four directions.

Every two adjacent intersections with traffic lights from intersections (1) to (2) and to the road terminals in the direction, from intersections (-1) to (-2) and to the road terminals in the direction Intersections, every two adjacent intersections with traffic lights from junctions O+l to 0+2 and to the road terminal in the direction, from intersections to 0-2 and to the road terminals in the direction, and The signal lights of other roads and every two adjacent intersections intersecting with them are the time required to drive from the green light of one intersection to the time of the appropriate driving speed to reach the next intersection, and the green light for the next intersection. Starts the time, and sets each time a "green light cycle" changes, 24 hours a day, and so on.

The green light on time of the two intersection lights has been set first, such as: intersection ◊ - 2 to (1-2) station, intersection ◊ - 2 station DC direction and CD direction, green light is set to 7 Point 3 minutes and 30 seconds; EF direction and FE direction of intersection (·1 - 2), green light start time is 4 minutes and 30 seconds, intersection ◊-2 and intersection (1 - 2) toward intersection (2-2) The green light starts to be subtracted (or added) for 30 seconds, which is 7:3 and 7:4, with a difference of 1 minute. If the intersection ◊ - 2 to (1-2), the speed of arrival in 1 minute is appropriate, the speed can be obtained by the distance of the road and the time of 1 minute; if the speed is too high or too low, one should be added or subtracted At the "green light cycle" time, measure the appropriate speed at the intersection (1-2).

The above-mentioned urban road traffic signal device design method is used for urban road signal light network control, For example, the design of the computer control system for traffic signals can also be used for the setting of signal single point machine networking. This design method makes the green light start time of the entire urban intersection correspond to the specific time of the day, which constitutes the "time chain" of the green light of the whole city intersection signal light (the "time chain" is composed of straight time. According to the signal timing in the "green light cycle", it is also possible to set the "time chain" which constitutes the green light when the vehicle turns to the left or right. A city can set up several "time chains" at different speeds to adapt to different periods of traffic or different seasons and climates. In the "time chain", the train only needs to travel normally according to the measured driving speed of the section, and the green light is usually encountered when passing from one intersection to the next.

: Establish a "time chain" where the green light of the urban road starts to light, and set a traffic sign between each two adjacent intersections. The traffic sign shows the distance from the current intersection to the next intersection. 2 Suitable Driving speed; 3 Use this speed to start from the current intersection green light to the next intersection green light to start the driving time and other information. This traffic sign can also display only two or one of the messages (only 2, 3 or only 2). If the traffic sign shows the message "30/57" (indicating that the average green light starts to light at 57 km/h to the next intersection); "40/1 ' 30 " " (indicating an average of 40 km/h) 1 minute and 30 seconds to the next intersection, the green light starts to light up; "47" (indicating that the green light starts to reach the next intersection with an average of 47 km/h); "35/hour" (indicating that the average travels at 35 km/h) A green light at the intersection starts to light up). Since the driving of one road section at the same time may go straight at the next intersection, it may turn to the left or right, and the driving time of the next intersection is straight, the left or right turn is different. The traffic sign is set on the urban road. Beside the signal light, or at a certain position of the road section, prompt the vehicle and inform the relevant information so that the train can arrive at the next intersection on time and pass smoothly during the green time.

A traffic sign showing the speed of travel will be described below with reference to the accompanying drawings.

As shown in Fig. 2, Fig. 3, and Fig. 4, "-,,," "f", and "one" in the figure are indicated by directions, and the two numbers in each direction are arranged up and down. The numbers above indicate that the vehicle is running. One road segment (or this road segment) The speed at which the roadway is going straight. The numbers below indicate the speed at which the next road segment (or this road segment) is to be turned to the left or right.

This traffic sign is made of materials that are clearly visible at night and night, or displayed in electronic subtitles, or displayed in light words, placed at appropriate locations on urban roads, alerting the driver to driving speed, and guiding the driver to accurately travel each section. When it arrived at the next intersection, it was just a green light and it passed smoothly.

The implementation of the design method of the traffic signal device, through the reasonable control of the traffic signal and the prompt of the road section information, can form a good order of the urban road traffic and a virtuous circle, so that the urban roads are handed over. Communication has become more secure, traffic congestion has been alleviated, and traffic energy consumption and pollution have been greatly reduced.

Claims

Claim

A method for designing an urban road traffic signal device, comprising the steps of:

(1) Setting traffic light fixtures at all relevant traffic intersections;

(2) determining the distance between each two adjacent intersections, setting the speed at which the road is driven, and the travel time required to reach the next intersection from one intersection at that speed;

(3) Determine the "green light cycle" of the intersection signal light;

(4) Select a junction such as intersection ^ as the starting point, determine a time in the 24 hours a day as the green light starting time of the intersection direction and the BA direction, and set each time to change the "green light cycle" to make it Repeatedly changing the green light start time in 24 hours a day;

(5) Start the green light in the four directions with the intersection ^, and add the relevant relevant road sections to the intersection (1), the intersection (-1), the intersection +1, and the driving time to reach the intersection. Set the green light start time of the next intersection (1), intersection (-1), intersection 0+1, and the relative direction of the intersection, and set each time to change the "green light cycle" once, so that it is 24 Repeatedly changing the green light start time in the hour;

2. The method for designing an urban road traffic signal device according to claim 1, wherein: a traffic sign is provided between each two adjacent intersections, and the traffic sign indicates that one of the vehicles passes from one intersection to the next. 2; the appropriate driving speed; 3 use this speed to reach the next intersection green light to start the driving time and other information, or only display two or one of the information.

3. A method of designing an urban road traffic signal device according to claim 2, wherein: said traffic sign is located beside an urban road signal light or at a certain location of the road segment.