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 31 in the N-S direction and 34 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.) Gmin, N-S = s Gmin, E-W = s
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 31 in the N-S direction and 34 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.) Gmin, N-S = s Gmin, E-W = s
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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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 31 in the N-S direction and 34 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.)
Gmin, N-S = s
Gmin, E-W = s
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