Which housing type has the second-highest average vehicle trips per unit?

• A. Duplexes and Townhomes
• B. Planned Unit Developments
• C. Apartments
• D. Condominiums

Answer: (B)

Vehicle trips per dwelling unit vary with how a housing type is designed and how people typically get around in that development. In trip-generation studies, dense, walkable forms like apartments and condominiums usually generate fewer vehicle trips per unit because residents can satisfy many needs on foot or with shared facilities, and there’s less reliance on private cars per household. Among the options, duplexes and townhomes tend to produce the most trips per unit, while planned unit developments fall in the middle. PUDs often mix housing with some density but are not always as pedestrian-friendly or as compact as the densest multifamily forms, so their per-unit trips are higher than apartments or condominiums but lower than the highest category. That placement makes planned unit developments the second-highest in average vehicle trips per unit.