A major traffic shift along the Diagonal Highway corridor began Monday night as crews closed the Niwot Road median at Colorado 119 through May 7 for construction tied to the CO 119 Safety, Mobility and Bikeway Project.
The closure affects motorists, cyclists, and RTD riders traveling between Boulder, Niwot, and Longmont along one of Boulder County’s busiest commuter corridors.
According to a Boulder County construction update, the closure began at 9 p.m. Monday and is expected to continue through 5 a.m. Wednesday, May 7. During the work, the intersection at Niwot Road and CO 119 will operate as a right-in, right-out intersection for all travel modes…