High-Risk Corridors
US 36, US 287, and the Diagonal Highway
Rideshare trips funnel onto the same roads where Boulder's worst crashes happen. The U.S. 36 corridor, the Denver-Boulder Turnpike that runs through Boulder on 28th Street, has seen multiple fatalities from head-on and single-vehicle collisions per Boulder County Vision Zero, and Colorado State Highway 119, the Diagonal Highway expressway between Boulder and Longmont, sees curve-related crashes and motorcyclist fatalities. Boulder County recorded 22 traffic deaths in 2023, 19 in 2024, and 17 in 2025. The 28th Street and Arapahoe Avenue intersection alone logged roughly 30 accidents at or near it in 2022 through early December per city reporting.