Road Geometric Design

The minimum stopping sight distance (SSD) on a level road depends mainly on:

• Speed and braking distance

• Speed and gradient only

• Speed, reaction time, and braking distance

• Speed, pavement type, and shoulder width

If the speed of a vehicle is doubled, the stopping sight distance will:

• Double

• Increase four times

• Remain the same

• Increase eight times

Which of the following is most critical for the design of overtaking sight distance (OSD)?

• Driver's reaction time

• Speed differential between overtaking and overtaken vehicles

• Road camber

• Vehicle acceleration only

The headlight sight distance on a road is usually considered equivalent to:

• Overtaking sight distance

• Intermediate sight distance

• Stopping sight distance

• Safe braking distance

Superelevation is provided on horizontal curves to:

• Reduce centrifugal force

• Counteract the effect of centrifugal force

• Reduce friction between tyres and pavement

• Increase vehicle speed

The minimum radius of a horizontal curve depends on:

• Vehicle length and road gradient

• Design speed, superelevation, and side friction

• Road camber and lane width

• Traffic volume and vehicle acceleration

Transition curves are provided in horizontal alignment to:

• Connect two straight roads directly

• Provide gradual introduction of centrifugal force

• Reduce the pavement cost

• Avoid overtaking on curves

The camber provided on the road surface is mainly for:

• Increasing sight distance

• Reducing pavement thickness

• Facilitating drainage of rainwater

• Providing comfort to the driver

The shoulder on a highway cross-section is meant for:

• Parking of vehicles

• Emergency use and lateral support to pavement

• Increasing carriageway width for traffic

• Aesthetic purpose only

The right of way (ROW) in a highway cross-section refers to:

• Width of the carriageway only

• Total land acquired for the road, including shoulders and drains

• Distance between the two carriageway edges

• Lane width plus median width