Two temporary median closures on Colorado Highway 119/Diagonal Highway have been rescheduled as part of ongoing safety and mobility improvements in Boulder County. The closures, which affect the medians at Jay Road and Niwot Road, are necessary for construction activities related to the CO 119 Safety, Mobility and Bikeway Improvements Project.
The Jay Road median closure will begin at 9 p.m. on Monday, October 13, and continue through midnight on Friday, October 17. During this period, the median will be closed to all modes of transportation. Construction crews will remove old concrete pavement, complete utility work, pour a new concrete sidewalk, perform striping operations, and install a permanent traffic signal pole. Separate detour routes will be provided for motorists and cyclists.
The Niwot Road median closure, originally scheduled for October 9, has been postponed to Thursday, October 16. This closure will start at 7 p.m. and last overnight until 5:30 a.m. It is required for electrical traffic system work. During this time, westbound travelers on Niwot Road will be directed north on CO 119, then west on Airport Road, and south on CO 119 to return to Niwot Road. Eastbound travelers will be directed south on CO 119, east on CO 52, and north on 79th Street back to Niwot Road.
According to project officials, full closures are intended to reduce the overall duration of traffic impacts and improve safety for both the public and construction crews. Local property owners will retain access during the closures, and emergency responders will be coordinated with to ensure access is maintained in work areas. The schedule may change depending on conditions.
The improvements are being made in anticipation of increased traffic volumes on the Diagonal Highway corridor between Boulder and Longmont, which are expected to rise by 25% by the year 2040. Higher traffic volumes could lead to more congestion, delays, emissions, and potentially more accidents.
The CO 119 Safety, Mobility and Bikeway Project aims to enhance safety throughout the corridor, increase the number of people able to move through the area, improve intersection efficiency, shorten transit travel times, and expand opportunities for bicycle commuting and connectivity within the local network. The project is designed to integrate with other multimodal initiatives along the corridor so that community members can travel safely and reliably using their preferred modes of transportation.
“Improve safety in the whole corridor
Maximize the number of people able to move through the corridor
Maximize intersection operational efficiency
Improve transit travel times and increase ridership
Maximize corridor-wide operational efficiency
Increase opportunities for bicycle commuting and connectivity to the bicycle and pedestrian network”
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