Traffic control method and apparatus
First Claim
1. A method of controlling traffic at an intersection, comprising the steps of:
- controlling traffic at the intersection initially by an adjustable ratio move technique;
determining the direction of a first vehicle at a predetermined distance from the intersection by providing a first vehicle permit in a first direction to the first vehicle to allow the vehicle to pass through the intersection;
determining the a motion parameter of the first vehicle from the intersection;
transmitting the motion parameters including the distance to a controller;
extending the first vehicle permit based on motion parameters of the first vehicle.
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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
19 Claims
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1. A method of controlling traffic at an intersection, comprising the steps of:
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controlling traffic at the intersection initially by an adjustable ratio move technique; determining the direction of a first vehicle at a predetermined distance from the intersection by providing a first vehicle permit in a first direction to the first vehicle to allow the vehicle to pass through the intersection; determining the a motion parameter of the first vehicle from the intersection; transmitting the motion parameters including the distance to a controller; extending the first vehicle permit based on motion parameters of the first vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of controlling traffic including vehicle traffic and walker traffic at an intersection, comprising the steps of:
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controlling traffic at the intersection initially by an adjustable ratio move technique; obtaining a motion parameter of a first vehicle traveling in a first direction approaching the intersection; determining the direction of a first vehicle at a predetermined distance from the intersection by providing a first vehicle permit in a first direction to the first vehicle to allow the vehicle to pass through the intersection; obtaining a walker request in a second direction for the walker traffic to cross the intersection; transmitting the motion parameter of the first vehicle to a controller; transmitting the walker request of the walker traffic to the controller; determining if the first vehicle permit is to be extended based upon the motion parameter of the first vehicle; obtaining a walker permit based upon whether or not the first vehicle permit is extended. - View Dependent Claims (10, 11)
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12. A system of controlling traffic at an intersection, comprising:
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a controller for controlling traffic at the intersection initially by an adjustable ratio move technique; a detection device for determining the direction of a first vehicle at a predetermined distance from the intersection by providing a first vehicle permit in a first direction to the first vehicle to allow the vehicle to pass through the intersection; the detection device determining the a motion parameter of the first vehicle from the intersection; the detection device transmitting the motion parameters including the distance to a controller; the controller extending the first vehicle permit based on motion parameters of the first vehicle. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification