According to Indian Road Congress (IRC), the guidelines for the design of traffic control signals is as follows:
    • The pedestrian green time required for the major roads is calculated based on a walking speed of 1.2 m/sec and an initial walk time of 7.0 sec.
    • The green time required for the vehicular traffic on the major road is increased in proportion to the traffic on the two approach roads.
    • The cycle time is calculated after allowing amber time for 2.0 sec each.
    • The minimum green time required for clearing vehicles arriving during a cycle is determined for each lane of the approach road assuming that the first vehicle will take 6.0 sec and the subsequent vehicles will be cleared at a rate of 2.0 sec. 
    • The optimum signal cycle time is calculated using Webster's formula.