American Institute of Certified Planners (AICP) Practice Exam

What describes a Level of Service C condition in traffic flow?

1. High volume with significant congestion

2. Reasonable steady flow with some limitations

3. Free flow with minimal restrictions

4. Heavy congestion with frequent stops

The correct answer is: Reasonable steady flow with some limitations

A Level of Service C condition in traffic flow is characterized by a reasonable steady flow of traffic where vehicles can move without excessive delays, but there are some limitations evident. This means that the traffic flow is stable, allowing for the movement of vehicles, but drivers may experience some restrictions such as a few delays at intersections or during peak travel times. In terms of practical application, Level of Service C indicates that while congestion is not extreme, it is approaching a level where traffic could begin to experience more significant delays. It represents a balance where traffic is still manageable, but drivers are aware that peak conditions can lead to longer travel times. Other conditions, such as high volume with significant congestion or heavy congestion with frequent stops, represent levels of service that fall below C, indicating a lower quality of traffic flow. Free flow with minimal restrictions would describe a better condition than C, while a Level of Service C recognizes the presence of some traffic limitations that are still manageable for drivers.