Planning Commission to discuss transportation impact analysis and demand-management rules

The Planning and Zoning Commission is set to discuss PM26-001, a proposed set of Transportation Impact Analysis and Transportation Demand Management requirements, at its Oct. 7 meeting agenda. Prior county staff work on the same concept has centered on a 30 net external peak-hour trip trigger for requiring a full traffic study, with smaller projects allowed to submit a trip-generation memo instead county staff report. That draft framework also ties approvals to mitigation, including combining on-site changes, off-site improvements, and travel-demand measures to hit at least “multimodal LOS D” at affected intersections, and it sets a target of reducing trips above the 30-trip threshold by 60% through measures like transit passes, carpool incentives, or other program requirements county staff report.

The record shows this topic has been queued up for Planning Commission discussion since at least Sept. 16 Sept. 16 agenda, and Town and County leaders were asked in July 2025 to start the Land Development Regulation update process to adopt formal traffic impact study and travel-demand rules joint meeting packet. For workforce housing and other infill, the key test is whether the county can monitor and enforce travel-demand promises after permits are issued.