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A sign is required to be put up asking drivers to slow down to 30 km/h before entering Zone Y (see figure). On this road, vehicles require 174 m to slow down to 30 km/h( the distance of 174 m includes the distance travelled during the perception – reaction time of drivers). The sign can be read by 6/6 vision drivers from a distance of 48 m. The sign is placed at a distance of x m from the start of Zone Y so that even a 6/9 vision driver can slow down to 30 km/h before entering the zone. The minimum value of x is ________ m. Direction of vehicle movement.
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- 132
- 19
- 142
- 96
Correct Option: C
For a 6/6 person, driver can see from 48 m.
For a 6/9 person, driver can see from 48 × | = 32m | |
9 |
Vehicle requires 174m to slow to 30 kmph.
Minimum distance, x = 174 – 32 = 142m