Red light avoidance system
A technology of red lights and signal lights, applied in traffic control systems of road vehicles, traffic control systems, instruments, etc.
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[0019] Figure 1A-Figure 1C A method for calculating an optimal vehicle speed profile is described. After the car 10 runs according to the optimal speed curve, it can avoid red lights when reaching the next signal light 20 . in, Figure 1A Indicates the relative positions of the vehicle 10 and the signal lamp 20 . The position of the signal light 20 is T, the position of the car 10 is V, the speed of the vehicle is S, and the driving route is R. at the initial time t 0 , the distance D between the car 10 and the signal light 20 is D 0 .
[0020] Figure 1B Indicates the phase order of the signal lights 20 . It contains multiple signal periods C 1 、C 2 .... Each signal cycle (eg C 1 ) contains red phase (that is, the signal light is red, such as R 1 ), green phase (that is, the signal light is green, such as G 1 ) and yellow phase (that is, the signal light is yellow, such as Y 1 ). at time t 1s , the signal light 20 from the red phase R 1 Change to green phase...
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