The stopping sight distance (SSD) for a level highway is 140 m for the design speedof 90 km/h. The acceleration due to gravity and deceleration rate are 9.81 m/s² and3.5 m/s² respectively. The perception/reaction time (in sec, round off to two decimalplaces) used in the SSD calculation is

Given data, Calculate the reaction time used in SSD ?Where, Distance of SSD level highway = 140 m…

Answered: The perception/reaction time

Engineering

Civil Engineering

The perception/reaction time

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter7: Intersection Design

Section: Chapter Questions

Problem 27P

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Question

The stopping sight distance (SSD) for a level highway is 140 m for the design speed
of 90 km/h. The acceleration due to gravity and deceleration rate are 9.81 m/s² and
3.5 m/s² respectively. The perception/reaction time (in sec, round off to two decimal
places) used in the SSD calculation is

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