Question

A 3 phase traffic signal is designed with 2 seconds of all red per phase and phase lengths of 25 seconds, 30 seconds, and 15 seconds. The cycle length is ____ seconds.

Answer 1

`CL=76secs`

Explanation:

From the question we are told that:

Traffic Phases p=3

Phase time Lengths

25 seconds, 30 seconds, and 15 seconds

Red Per Phase
`T=2sec`

Generally the equation for Cycle Length is mathematically given by

`CL=Phase\ Length+Red\ Per\ Phase`

`CL=(25+2)+(30+2)+(15+2)`

`CL=76secs`