GATE CE 2021 Set 2 — Question 64
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Transportation Engineering → Cross-Section & Sight Distance → Stopping Sight Distance
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Question
The stopping sight distance (SSD) for a level highway is for the design speed of . The acceleration due to gravity and deceleration rate are and , respectively. The perception/reaction time (in , round off to two decimal places) used in the SSD calculation is ____________
Correct answer
1.9 to 2.1
Solution
The formula for Stopping Sight Distance (SSD) is:Where:
= design speed in
= perception/reaction time in
= deceleration rate
Substituting the values:Rounding off to two decimal places, we get .
= design speed in
= perception/reaction time in
= deceleration rate
Substituting the values:Rounding off to two decimal places, we get .
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