Intelligent transportation system

Abstract

An intelligent transportation system, which provides a method for calculating the enabling (disabling) time of each intersection phase at each intersection. Enabling or disabling cycles of intersections in an area are set, wherein the enabling or disabling cycles of the intersections in the area are the same (step 1); the cycle value is divided by 4 to obtain an enabling time value of each intersection phase, the cycle time value is divided by 8 to obtain a "magnification factor" required for traveling the distance between two intersections, and an appropriate value is selected on the basis of the distance between the two intersections, and is multiplied by the "magnification factor" to obtain a travel time value between the two intersections (step 2); the travel time value between the two intersections is added to the enabling time of a first intersection phase at the current intersection to obtain a value which is the enabling time of a first intersection phase at the next intersection (step 3); the travel time value between the two intersections is subtracted from the enabling time of an intersection (phase) opposite to the first intersection phase at the current intersection to obtain the enabling time of the corresponding phase at the next intersection, wherein when a negative number appears, the enabling time in the next cycle is used in the subtraction (step 4); appropriate addition / subtraction are performed on the enabling and disabling times on the basis of the traffic flow of each intersection phase, wherein when addition is performed for one phase, subtraction is performed for another phase adjacent to said phase, and the cycle remains unchanged (step 5). Vehicles can travel safely and quickly.

Description

[Revised according to Detailed Rules 26, 2004.09.2025] An intelligent transportation system Technical Field

[0001] This invention relates to intelligent transportation, and more particularly to an intelligent transportation system. Background Technology

[0002] Given the continuous improvement of people's living standards in my country, the number of cars owned per 100 households is increasing significantly, while road construction is relatively lagging behind, leading to road congestion, especially at intersections. This case introduces an intelligent transportation system that proposes: a temporary convoy fast and priority driving mode; a road-based traffic management mode at each intersection; and a mode that allows for the simultaneous opening (closing) of various intersections. The superposition of these three innovative modes provides a strong guarantee for the safe and rapid travel of vehicles. Summary of the Invention

[0003] This invention introduces an intelligent transportation system, which proposes: (i) a fast and priority driving mode for temporary convoys; (ii) a road-based management mode for each intersection; (iii) a waiting area for non-motorized vehicles to turn left on the motor vehicle lanes at intersections; (iv) a calculation method for the opening (closing) of each phase of the intersection; (v) "Breakthrough" traffic lights installed on roads outside the intersections; (vi) a waiting area for vehicles to exit the temporary convoy at intersections; (vii) two traffic modes implemented on the road; and (viii) signs (lights) installed along the road to inform drivers of the recommended driving speed in the current road segment and the time when the straight lane at the next intersection will open (close).

[0004] The temporary convoy refers to vehicles that exit from the straight lane at one intersection and continue driving in the straight lane at the next intersection; (i) the temporary convoy's fast and priority driving mode means that when the temporary convoy reaches each intersection, pedestrians, motor vehicles, and non-motor vehicles are not allowed to cross with it, nor are right-turning motor vehicles allowed to merge into it; (ii) the intersection's road-based management mode means that the traditional two-cycle opening (closing) of the intersection is changed to a four-cycle system. If one phase of the intersection is open, the other three phases are closed. {Sometimes the straight lanes of east-west intersections are one group (phase), the left-turn lanes of east-west intersections are one group (phase), and the straight lanes of south-north intersections are one group (phase).} The left-turn lanes at the south and north intersections are grouped together (phases). This four-cycle opening (closing) method of the intersection means that when the temporary convoy arrives at the intersection, it will not cross with other vehicles or non-motorized vehicles, thus allowing the vehicle to pass through the intersection at the permitted driving speed; (iii) The non-motorized vehicle left-turn waiting area set up on the motor vehicle lane at the intersection means that: the non-motorized vehicle turning left does not turn left directly on the non-motorized vehicle lane. It enters the non-motorized vehicle left-turn waiting area when the intersection is red, and then exits from the non-motorized vehicle left-turn waiting area when the intersection is open, so as not to cross with the straight-going motor vehicles; (iv) The calculation method for the opening of each phase of the intersection [the east, south, west, and north phases of the intersection] Towards the intersection, there are (remember) phase 1, phase 2, phase 3, and phase 4 intersections, but they do not correspond to each other. Step (1): Set the opening (closing) cycle of each phase intersection in each intersection. The opening (closing) cycle of each intersection in the area is the same. Step (2): Divide the cycle value by 4 (÷4) to get the opening time value of each phase intersection. Divide the time value by 2 to get the "multiplier base". According to the distance between the two intersections, select an appropriate value and multiply it by the "multiplier base" to get the travel time value of the two intersections. Step (3): Add the opening time of the first phase intersection of the previous intersection to the travel time value of the two intersections. This value is the opening time of the first phase intersection of the next intersection. (When the number of non-temporary convoy vehicles that arrive in advance is too large, or affected by other factors, The opening time of this road is adjusted appropriately on the basis of the following opening times of each phase (the opening times of each phase are not repeated); Step (4) The opening time of the first phase of the previous road is subtracted from the travel time of the two road intersections (when a negative number appears, the next cycle is used, and the opening time is subtracted) to obtain the opening time of the first phase of the next road intersection. [When the opening time of the first phase of the next road intersection coincides with the opening time of its opposite phase, their left-turn lanes form another phase sequence, and the other straight lane and its opposite phase form another phase sequence, and their left-turn lanes also form another phase sequence]. The opening order of the remaining two phases is selected according to the coordination degree of the two phases connected to it.Step (5): Adjust the opening and closing times according to the traffic flow at each intersection. When one intersection is added, the adjacent intersection is subtracted, and the cycle remains unchanged. When the opening (closing) times of intersections along the entire horizontal and vertical roads in the whole area are calculated continuously, the "next intersection" becomes the "previous intersection" and the current intersection becomes the "next intersection", and so on. The calculation can be performed according to the above method. (V) The "breakthrough" signal lights set up on the road outside the intersection mean that when a temporary convoy of vehicles arrives at a congested intersection, and the intersection is in red light period, in order to ensure the traffic efficiency of the intersection, a set of "breakthrough" signal lights is set up on the road outside the intersection, that is, the vehicles are turned off. The vehicle start time is set here, saving 3-5 seconds at the intersection within one cycle; (vi) The waiting area for vehicles to exit the temporary convoy is set up at the intersection, which means that when a vehicle exits the temporary convoy at the intersection, if it is obstructed by pedestrians, motor vehicles, or non-motor vehicles, it can enter the waiting area first, so as not to affect the rapid driving of the following vehicles; (vii) The above-mentioned roads implement two traffic modes, which means that in order to ensure the rapid and safe driving of the temporary convoy, each alley intersection, community intersection, factory intersection, etc. is equipped with a no-pass signal light. When the temporary convoy drives to each intersection, crossing with it is prohibited. After the temporary convoy passes through the time period, each alley intersection, community intersection, factory intersection, etc., returns to the original cross-traffic state.

Claims

1. An intelligent transportation system, characterized in that: The calculation method for the opening (closing) time of each intersection is as follows: Step (1): Set the opening (closing) cycle of intersections in the area [the opening (closing) cycle of each intersection in the area is the same]; Step (2): Divide the cycle value by 4 (÷4) to get the opening time value of each intersection, and divide the cycle time value by 8 (÷8) to get the distance between the two intersections and the "multiplier base" required for travel; Select an appropriate value according to the distance between the two intersections, and multiply it by the "multiplier base" to get the travel time between the two intersections. Driving time value; Step (3): The opening time of the first phase of the previous intersection plus the driving time value of the two intersections. This value is the opening time of the first phase of the next intersection (when the number of non-temporary convoy vehicles arriving in advance is too large, or affected by other factors, this opening time is adjusted appropriately based on it. The opening times of each phase below will also be adjusted accordingly and will not be repeated); Step (4): The opening time of the opposite (phase) intersection of the first phase of the previous intersection minus the driving time value of the two intersections. When a negative number appears, subtract the opening time of the next cycle (phase sequence unchanged) to obtain the opening time of the next intersection and the opening time of the opposite (phase) intersection of the first phase intersection. When the opening time of the first phase intersection of the next intersection coincides with the opening time of its opposite (phase) intersection, their left-turn lanes form another phase sequence, and the other straight lane intersection and its opposite (phase) intersection form another phase sequence, and their left-turn lanes also form another phase sequence. The opening sequence of the remaining two phase intersections is selected according to the coordination degree of the two phase intersections connected to it. Step (5): According to the traffic flow of each phase intersection, the opening and closing times are appropriately added or subtracted. When one phase is added, the other adjacent phase is subtracted, and the cycle remains unchanged. When the opening (closing) time of the intersections of the entire horizontal and vertical roads in the whole area is calculated continuously, the "next intersection" in the above becomes the "previous intersection" in the corresponding other intersection connected to it, and this intersection becomes the "next intersection". And so on, the calculation can be performed according to the above method.

2. When the opening times of multiple longitudinal and transverse roads at a "closed" intersection in the area conflict, a "breakthrough" signal light should be installed on the road outside the intersection; the vehicle's starting time should be set here to ensure the passage efficiency of the intersection.