A pre-timed four phase signal has critical lane flow rate for the first three phases as 200, 187 and 210 veh/hr with saturation flow rate of 1800 veh/hr/lane for all phases. The lost time is given as 4 seconds for each phases. If the cycle length is 60 seconds, the effective green time (in seconds) of the fourth phase is __________

A pre-timed four phase signal has critical lane flow rate for the firs

1.	A pre-timed four phase signal has critical lane flow rate for the first three phases as 200, 187 and 210 veh/hr with saturation flow rate of 1800 veh/hr/lane for all phases. The lost time is given as 4 seconds for each phases. If the cycle length is 60 seconds, the effective green time (in seconds) of the fourth phase is __________
A.	14 to 18
B.	12
C.	18
D.	14
Answer» B. 12

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