GATE CE 2015 Set 1 — Question 63
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Transportation Engineering → Cross-Section & Sight Distance → Sight Distance
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Question
A sign is required to be put up asking drivers to slow down to before entering Zone (see figure). On this road, vehicles require to slow down to (the distance of includes the distance travelled during the perception-reaction time of drivers). The sign can be read by vision drivers from a distance of . The sign is placed at a distance of from the start of Zone so that even a vision driver can slow down to before entering the zone. The minimum value of is _______________ m.
Correct answer
141.84 to 142.32
Solution
1.Distance required to slow down = .
2.Visibility distance for vision = .
3.Visibility distance for vision = .
4.A vision driver reads the sign before reaching it.
5.If the sign is at distance from Zone , the total distance available to slow down from the point of reading is .
6.For safety: .
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