Traffic Light Signaling Vehicle-detection sensors are placed along lanes C and D (main road) and lanes A and B (access road). These sensor outputs are low (0) when no vehicle is present and High (1) when a vehicle is present. The intersection traffic light is to be controlled according to the following logic: a) The east-west (E-W) traffic light will be green whenever both lanes C and D are occupied. b) The E-W light will be green whenever either C or D is occupied but lanes A and B are not both occupied. c) The north-south (N-S) light will be green whenever both lanes A and B are occupied but C and D are not both occupied. d) The N-S light will also be green when either A or B is occupied while C and D are both vacant. e) The E-W light will be green when no vehicle is present For the above problem the truth table is constructed having four inputs (A, B,C, D) and two outputs E-W and N-S.