American Institute of Certified Planners (AICP) Practice Exam

What is the vehicle trip rate for duplexes and townhouses?

1. 5 Vehicle Trips per Unit

2. 6 Vehicle Trips per Unit

3. 7 Vehicle Trips per Unit

4. 8 Vehicle Trips per Unit

The correct answer is: 7 Vehicle Trips per Unit

The vehicle trip rate for duplexes and townhouses is generally recognized as 7 vehicle trips per unit. This figure is based on empirical studies and transportation planning guidelines that assess travel patterns associated with different residential densities and configurations. Duplexes and townhouses typically generate more trips than single-family homes due to factors such as shared walls and reduced lot sizes, which can lead to increased occupancy. Moreover, the trip generation factors account for the density of the housing type, the demographics of the residents, and typical household behaviors regarding travel. This rate serves as a benchmark for planners to estimate traffic impacts and plan appropriately for infrastructure needs in the surrounding area, ensuring that development is sustainable and aligns with local mobility frameworks.