High-Crash Corridors
High-crash corridors: US-36 and the CO-119 Diagonal
Boulder's road network is shaped by two highways, and distraction turns each of them dangerous. US-36, the Denver-Boulder Turnpike, enters the city as 28th Street, Boulder's main commercial corridor, carrying heavy commuter and retail traffic. CO-119 runs as Canyon Boulevard through Boulder Canyon and as the Diagonal Highway toward Longmont, a corridor CDOT documents as producing more severe crashes per mile than any other road in unincorporated Boulder County. Broadway and Foothills Highway (SH 93), Foothills Parkway (SH 157), and the Arapahoe Avenue corridor (CO-7) carry the rest of the city's traffic, alongside heavy bicycle, pedestrian, and student traffic near the CU campus. A driver who can manage inattention on a quiet road cannot at these speeds.