Question

Traffic capacity is the

• A. Ability of roadway to accommodate volume in terms of vehicles per hour
• B. Number of vehicles occupying unit length of roadway at a given instant expressed as vehicles per km
• C. Capacity of lane to accommodate vehicles width wise (across the road)
• D. Maximum attainable speed of the vehicles

Hint:

Do not confuse: \[ \boxed{ \begin{aligned} \text{Capacity} &\rightarrow \text{veh/hr} \text{Density} &\rightarrow \text{veh/km} \text{Speed} &\rightarrow \text{km/hr} \end{aligned} } \]

Answer 1

The Correct Option is A

Concept: Traffic capacity is defined as the maximum number of vehicles that can pass a given point on a roadway or lane during a specified period under prevailing roadway and traffic conditions. It is generally expressed as \[ \boxed{\text{Vehicles per hour (veh/hr)}.} \]

Step 1: Understand the definition. Traffic capacity represents the carrying ability of a roadway. It is measured in terms of the traffic volume that the road can accommodate safely and efficiently.

Step 2: Distinguish from other traffic parameters.
• Traffic density is expressed in vehicles/km.
• Speed is expressed in km/h.
• Capacity is expressed in vehicles/hour. Hence, \[ \boxed{\text{Traffic capacity is the ability of a roadway to accommodate traffic volume in vehicles per hour}.} \] Therefore, the correct option is \[ \boxed{(A)\;\text{Ability of roadway to accommodate volume in terms of vehicles per hour}.} \]