An intersection has four phase signal with movements allowed in each phase and corresponding analysis and

situation flow rate are provided in following table. Calculate the sum of flow ratios for the critical lane group.

Determine the optimal cycle length considering total lost time is as $4sec.$ for each phase. What will be the

effective green time for all phase considering the amber time as $5sec.$ for each phase. Assume width of all

approach roads to the intersection is $10\mathrm{.}5m.$ At each approach, one exclusive lane is used for right turning

vehicles and remaining both lanes are used for through and left turning vehicles.

EB: cast bound, WB: west bound, NB: North Bound, SB: South bound