# Consider the intersection of Vine and Maple Streets as shown in the attachment. Suppose Vine…

Consider the intersection of Vine and Maple Streets as shown in the attachment. Suppose Vine Streets northbound and southbound approaches are both on an 4% upgrade. Assume 5 seconds of lost time for each phase and a saturation flow rate of 1800 veh/hr-green/lane (note the bold font, i.e., multiply by the number of lanes when applicable to obtain S)for protected phases and 500 veh/hr-green/lanefor permitted phases.Calculate the yellow and all-red clearance intervals for through movementsCalculate the optimal cycle and corresponding timing for the given three phasing diagram shown in the
Consider the intersection of Vine and Maple Streets as shown in the attachment. Suppose Vine Streets northbound and southbound approaches are both on an 4% upgrade. Assume 5 seconds of lost time for each phase and a saturation flow rate of 1800 veh/hr-green/lane (note the bold font, i.e., multiply by the number of lanes when applicable to obtain S)for protected phases and 500 veh/hr-green/lanefor permitted phases.Calculate the yellow and all-red clearance intervals for through movementsCalculate the optimal cycle and corresponding timing for the given three phasing diagram shown in the figureAn engineer decides to change the north-south left turn movements to protected-left turn operation, calculate the corresponding optimal timingThe engineer decides to make all left turns permitted only, calculate the corresponding timing planWhich of the three timing cases above is superior and why (compare based on delay) ?

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