Engineering staff brief commissioners on traffic impact studies, warrants and infrastructure coordination

Engineering services staff gave a study-session briefing to the Arapahoe County Planning Commission on Feb. 4 covering how the county evaluates traffic impacts from development, what traffic warrants are, and how infrastructure improvements are identified and funded.

The presentation by Celia Rathhammer, Engineering Services Division manager, covered the county's infrastructure design and construction standards, the county’s use of traffic impact studies (TIS) and traffic conformance letters, pedestrian and bicycle considerations, level-of-service expectations for roadways, and coordination on major projects such as the Gun Club Road widening.

Why it matters: Commissioners said traffic impacts are a central concern for applicants and nearby residents, and the commission cited the Copperleaf amendment as an example where traffic questions have driven public testimony. Staff outlined when a TIS is required, how developers can be required to mitigate impacts whether or not a TIS is prepared, and options from signalization to underpasses to address pedestrian safety.

Key points from…