If the average center to center spacing of vehicles is 20 meters, then the basic capacity of a traffic lane at a speed of 50 kmph is
- A2500 vehicles per day
- B2000 vehicles per hour
- C2500 vehicles per hourCorrect
- D1000 vehicles per hour
Solution
Concept
Basic capacity
Formula
C = 1000 V / S (vehicles per hour, V in km/h, S in m)
Step-by-step solution
1. V = 50 km/h, S = 20 m. 2. C = 1000 × 50 / 20 = 2500 vehicles per hour.
Explanation
The theoretical (basic) capacity of one lane equals the number of vehicles that pass a point in an hour at a given speed and a given centre-to-centre spacing.
Shortcut
C = 1000 V / S.
Common mistake
Using the spacing in kilometres.
Correct answer: C) 2500 vehicles per hour