Determine the minimum length of a sag vertical curve if the grades are -4% and +2%. The design speed is 70 mph. Assume the driver's reaction time is 2.5 seconds and the deceleration rate is 11.2 ft/s². Use the standard headlight criteria and riding comfort criteria from the FE SSD equations and select the largest curve length that meets the assumptions.

Determine the minimum length of a sag vertical curve if the grades are -4% and +2%. The design speed is 70 mph. Assume the driver's reaction time is 2.5 seconds and the deceleration rate is 11.2 ft/s². Use the standard headlight criteria and riding comfort criteria from the FE SSD equations and select the largest curve length that meets the assumptions.

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter15: Geometric Design Of Highway Facilities

Section: Chapter Questions

Problem 25P

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