A building is located 19 ft from the centerline of the inside lane of a curved section of highway with a 400 ft radius. The road is level; e = 0.10. Determine the appropriate speed limit (to the nearest 5 mi/h) considering the following conditions: stopping sight distance and curve radius.
What will be an ideal response?
To determine sight distance past the building located on the inside of the curve,
use Figure 15.26 and a rearrangement of Equation 15.43.
Use Equation 3.27 for stopping sight distance to determine the appropriate speed.
Assume a = 11.2 ft/sec2, perception-reaction time = 2.5 sec, and that the road is
level.
Speed limits are posted in increments of 5 mi/h; the appropriate speed is 35 mi/h.
To determine the appropriate speed based on curve radius, use Equation 15.24,
Speed limits are posted in increments of 5 mi/h; the appropriate speed is 35 mi/h.
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