Highway Engineering MCQ Questions & Answers | Civil Engineering

In Highway Engineering, annual average daily traffic (AADT) is a key parameter used for designing highway facilities.

AADT refers to the total volume of vehicle traffic passing through a specific point or segment of a highway over the course of a year, averaged over each day.

Option A: annual average hourly volume is incorrect because it focuses on the average traffic volume per hour, not per day, which is less relevant for overall highway design.

Option C: thirtieth highest hourly volume is incorrect because it refers to a specific hourly volume ranking, not the overall average traffic flow used for design purposes.

Option D: peak hourly volume of the year is incorrect because it refers to the highest hourly traffic volume observed during the year, which is not used for designing highway facilities that need to accommodate typical traffic patterns over time.

Therefore, the correct answer is annual average daily traffic.

The provision of traffic signals at intersections is primarily intended to control and regulate traffic flow.

Traffic signals help in reducing right angled collisions (also called angle or T-bone collisions) because they control the movement of vehicles crossing paths.

However, the sudden stopping of vehicles at red lights can sometimes lead to an increase in rear end collisions, as following vehicles may not always stop in time.

Therefore, traffic signals reduce right angled collisions but may increase rear end collisions.

Hence, the correct answer is Option C: reduces right angled collisions but may increase rear end collisions.