Highway_APPSC CE Quiz-1

On what factors does stopping sight distance depends?

1. Speed of vehicle
2. longitudinal friction coefficient
3. braking efficiency
4. Reaction time

Calculate the safe stopping sight distance (in m) for the descending gradient of 3% for a design speed of 80 km/h. Take coefficient of friction as 0.35 and total reaction time as 2 seconds.

Calculate the lag distance for a design speed of 65 km/hr assuming the coefficient of friction as 0.36 and total reaction time of driver as 2.5 seconds?

Assuming a longitudinal coefficient of friction to be 0.5, the resulting retardation of a vehicle being brought to stop is, nearly (only magnitude)

A valley curve is formed by a descending gradient of 1 in 30 meeting an ascending gradient of 1 in 20. Calculate the length of valley curve for comfort condition if design speed on the curve is 70 kmph. Assume coefficient of centrifugal acceleration to be 0.54 m/s³.

Too steep cross slopes on pavement surface is avoided because

(i) It may create discomfort to people riding on the surface.

(ii) Slow moving vehicle might have a tendency to overturn.

(iii) Rutting of pavement is possible.

(iv) It may decrease skid resistance of pavement.

Match List 1 with List 2 and select the answer using the codes given below:

List 1
(i) Kerbs

(ii) Shoulders

(iii) Median

(iv) Camber

List 2

(a) Cross slope provided to raise the middle of road surface.

(b) Traffic separator provided between two adjacent lanes.

(c) Dividing line between carriageway and footpath.

(d) Provided along the road edge to serve as emergency lane.

i - ii - iii - iv

Which of the following is correct statement for the cross slope of the shoulder?

Right of way is the summation of the width of________.