Traffic control method and apparatus
First Claim
1. A method for intersection traffic control includes the steps of:
- (1) Starting;
setting Ratio-Move as initial state; and
setting up all the other needed parameters;
(2) Time Processing;
measuring time, if a time unit is not obtained, run step (6) or (2);
(3) Vehicle Request Processing;
deciding if an Extra-Move permit is granted with reference to the state and its direction;
(4) Extra-Move Processing;
measuring Extra-Move time from the Extra-Move permitted and changing the permit when needed;
(5) Ratio-Move Processing;
measuring Ratio-Move time from the Ratio-Move permitted and changing the permit when needed;
(6) Recycling;
running step (2) directly or adding some sub-processes before it;
Said Ratio-Move is a state that follows RATIO;
Said Extra-Move is the other state that occupies some time of Ratio-Move and inserts an Extra-Direction beyond the turn order of Ratio-Directions;
Said Ratio-Direction holds a Ratio-Move permit;
Said Extra-Direction holds an Extra-Move permit;
Said permit comprises Move, Watch, and Clean;
Said permit time=move time+watch time+clean time;
Said RATIO is the most common method of intersection traffic control. It sets up a permit time for every direction according to some ratio, e.g., a ratio of north-south traffic volume over east-west;
initially after traffic-cleaning for some time, it gives the only pass-permit to a direction;
then it turns the only one permit to the next direction with its corresponding permit time in certain order from an initial direction on when the permit time of a current permitted direction runs out.
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Accused Products
Abstract
A method called as a time-differential-ratio method and its apparatus used for intersection traffic control that differentially operates on the traffic so as to change pass-permit direction with traffic status in time is disclosed. The method includes the steps of starting, timing, vehicle-requesting, extra-moving, ratio-moving, and recycling. Unlike a common control method called as macro-estimate control method that forces changeable traffic to follow a given period and direction turn order to pass, which causes lots of stops and wait, a differential operations on the traffic are integrated with a common ratio control method and walker signals. It shows the operating features and the effective characteristic of both micro-time control and macro ratio control, which lets a vehicle arriving first pass first conditionally, is good for real-time arbitrary traffic pattern control, and leads to great reduction of stops and wait. The apparatus needed for the method includes sensing/detecting apparatuses and processing apparatus.
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Citations
9 Claims
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1. A method for intersection traffic control includes the steps of:
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(1) Starting;
setting Ratio-Move as initial state; and
setting up all the other needed parameters;
(2) Time Processing;
measuring time, if a time unit is not obtained, run step (6) or (2);
(3) Vehicle Request Processing;
deciding if an Extra-Move permit is granted with reference to the state and its direction;
(4) Extra-Move Processing;
measuring Extra-Move time from the Extra-Move permitted and changing the permit when needed;
(5) Ratio-Move Processing;
measuring Ratio-Move time from the Ratio-Move permitted and changing the permit when needed;
(6) Recycling;
running step (2) directly or adding some sub-processes before it;
Said Ratio-Move is a state that follows RATIO;
Said Extra-Move is the other state that occupies some time of Ratio-Move and inserts an Extra-Direction beyond the turn order of Ratio-Directions;
Said Ratio-Direction holds a Ratio-Move permit;
Said Extra-Direction holds an Extra-Move permit;
Said permit comprises Move, Watch, and Clean;
Said permit time=move time+watch time+clean time;
Said RATIO is the most common method of intersection traffic control. It sets up a permit time for every direction according to some ratio, e.g., a ratio of north-south traffic volume over east-west;
initially after traffic-cleaning for some time, it gives the only pass-permit to a direction;
then it turns the only one permit to the next direction with its corresponding permit time in certain order from an initial direction on when the permit time of a current permitted direction runs out. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification