Test: Traffic Characteristics - Civil Engineering (CE) MCQ

Off tracking = l2/2R
= 6.5*6.5/70
= 0.6m.

Whenever a four wheeled vehicle such as bus or truck negotiates the horizontal curve then there is a centrifugal force induced and a difference is formed between front and rear axle which is called as off tracking.

In the braking test the wheels are assumed to be fully locked and the efficiency is assumed as 100%.

speed = 45/3.6
= 12.5m/sec
Braking distance = u2/2gf
10 = 12.5*12.5/ (2*9.81*f)
F = 0.78m.

The factors affecting traffic characteristics are physical, mental, environmental and psychological.

The weight of the vehicle and wheel loads usually recommended by IRC is used for the design of pavements and cross drainage structures.

A person who is extremely intelligent if he consumes alcohol, then there is a chance of losing his control over mind temporarily and will have an increase in reaction time.

The visibility, hearing and reaction time are related to the physical conditions of the road, they are covered under physical type.

The most likely cause in this case is impatience in driving as it may lead to anxiety and fear; this mostly affects the user psychologically.

The pollutant mostly released by automobiles is CO, when it is mixed with haemoglobin it forms carboxyhaemoglobin which is very dangerous for health.