Step 1: Understanding the question.
Traffic capacity refers to the maximum number of vehicles that can pass through a given point on a road within a specific time frame, typically one hour. This is a key concept in traffic engineering and urban planning.
Step 2: Analyzing the options.
(A) Traffic Flow: Traffic flow refers to the rate at which vehicles pass a specific point, but it does not specifically refer to the maximum capacity.
(B) Traffic Capacity: Correct — Traffic capacity represents the maximum number of vehicles that a road can handle per unit time.
(C) Traffic Volume: Traffic volume refers to the total number of vehicles passing a point, but it does not define the maximum number that can pass.
(D) Traffic Density: Traffic density refers to the number of vehicles per unit length of the road, not the maximum vehicles passing through.
Step 3: Conclusion.
The correct answer is (B) Traffic Capacity, as it refers to the maximum number of vehicles that can pass through a point on the road in one hour.