For each approach determine the yellow interval length and howto provide it.

Question

A traffic signal control is being designed for a four-leg intersection on a divided highway with the characteristics shown in the table below. N-S Approaches E-W Approaches Median width, (ft) 16 12 Number of 12 ft lanes on each approach 3 2 Design speed, mph 50 40 Grade 0% 3% Determine the minimum green times (in s) for each approach if the effective crosswalk width in each direction is 8 ft and the number of pedestrians crossing during an interval is 22 in the N-S direction and 31 in the E-W direction. (Assume the average speed of pedestrians is 3.5 ft/s, and that it is feasible to disregard the yellow change and red clearance intervals.)

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Chapter 8, Problem 11P

To determine

For each approach determine the yellow interval length and howto provide it.

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A traffic signal control is being designed for a four-leg intersection on a divided highway with the characteristics shown in the table below. N-S Approaches E-W Approaches Median width, (ft) 16 12 Number of 12 ft lanes on each approach 3 2 Design speed, mph 50 40 Grade 0% 3% Determine the minimum green times (in s) for each approach if the effective crosswalk width in each direction is 8 ft and the number of pedestrians crossing during an interval is 22 in the N-S direction and 31 in the E-W direction. (Assume the average speed of pedestrians is 3.5 ft/s, and that it is feasible to disregard the yellow change and red clearance intervals.)

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