A pre-timed four-phase signal has a critical lane flow rate for the first three phases as 200, 187 and 210 veh/hr with a saturation flow rate of 1800 veh/hr/lane for all phases. The lost time is given as 4 seconds for each phase. 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 a critical lane flow rate for the fi

1.	A pre-timed four-phase signal has a critical lane flow rate for the first three phases as 200, 187 and 210 veh/hr with a saturation flow rate of 1800 veh/hr/lane for all phases. The lost time is given as 4 seconds for each phase. If the cycle length is 60 seconds, the effective green time (in seconds) of the fourth phase is ______________
A.	15.74
B.	15.84
C.	15.64
D.	15.94
Answer» B. 15.84