Question: 1 . 8 The sketch below shows design data for a three phase, pre - timed signal of an at - grade intersection. Assume total

1.8 The sketch below shows design data for a three phase, pre-timed signal of an at-grade intersection. Assume total lost time per phase equals to 3 sec, yellow time =3 sec per phase, clearance time =2 sec per phase. Ignore pedestrians. Use Websters equation to estimate the optimal cycle length. Round up to the nearest 10 and determine green time allocation for each phase. (11)

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