## Highway Engineering Questions and Answers - Design of Traffic Intersections

1. The clearance time is indicated by __________
a) Red
b) Amber
c) Green
d) White

Explanation: The clearance time is indicated by amber, in some places yellow and blue color also used.

2. An intersection that is provided for different levels of road is called __________
c) Channelized intersection
d) Rotary intersection

Explanation: An intersection that is provided for different levels of road is called grade separated intersection, thus eliminating the crossing manoeuvre.

3. If the velocity of a vehicle is 60kmph and the other vehicle velocity is 20kmph, then the relative velocity is?
a) 80kmph
b) 40kmph
c) 20kmph
d) 60kmph

Explanation: The relative velocity is the difference of the velocities moving in same direction and sum of the velocities of vehicle moving in opposite direction.

4. If an additional pavement is provided for lane change, then that intersection is called __________
a) Tee intersection
b) Rotary intersection
c) Flared intersection
d) Skewed intersection

Explanation: If an additional pavement is provided for lane change, then that intersection is called as flared intersection, it is provided in very crowded areas.

5. Which of the following is not a requirement for the intersection at grade?
a) Area of conflict should be large
c) Avoiding sudden change of path
d) Sufficient radius should be provided

Explanation: The intersection at grade requirements do not include large conflict area, it says the area of conflict should be as less as possible

6. The most complex type of intersections for traffic operation is __________
a) Un-channelized
b) Channelized
c) Rotary

Explanation: The channelized intersections are the most complex type of intersections for traffic operation, but they are very easy to construct.

7. The procedure of adopting medians and traffic island in an un-channelized intersection is called __________
a) Dividing
b) Crossing
c) Channelizing
d) Designing

Explanation: The procedure of adopting medians and traffic island in an un-channelized intersection is called as channelizing of the intersection.

8. In India the design velocity at rotary is considered as __________
a) 30kmph
b) 40kmph
c) 50kmph
d) 60kmph

Explanation: In India, usually there is no limit to approach the rotary but for safety it is considered as 40kmph for design purposes.

9. If the average width of the entry section is 3m and the exit is 6m then the average width is?
a) 4m
b) 4.5m
c) 5.0m
d) 5.5m