Public Works Announces Niwot Road Median Closure Near Diagonal Highway — August 2026

Public Works Announces Niwot Road Median Closure Near Diagonal Highway — August 2026

Boulder County Public Works announces a temporary median closure on Niwot Road near the CO-119 Diagonal Highway intersection for utility infrastructure improvements. The closure will affect left turns from Niwot Road onto the Diagonal Highway for approximately six weeks. A signed detour route will be in place.

Transportation access remains a key concern. Boulder County’s Via mobility program provides door-to-door transit service for residents in Niwot and surrounding communities who cannot access fixed-route bus service. RTD routes B, J, and BOLT serve major corridors.

The program is modeled after similar successful initiatives in Larimer County and Jefferson County. Boulder County’s version includes additional provisions for wildfire mitigation, affordable housing, and environmental sustainability.

Frequently Asked Questions

Climate considerations are central to this effort. Boulder County’s 2025 Climate Action Plan sets targets of reducing greenhouse gas emissions 21% below 2005 levels by 2030. This project contributes to those goals through energy efficiency improvements, renewable energy integration, and reduced vehicle miles traveled.

Environmental review of the project area near 75th Street found 4 sensitive species and 4 wetland areas requiring mitigation. The Community Justice Services worked with Colorado Parks and Wildlife to develop a habitat conservation plan.