Dangerous Corridors
28th Street and Arapahoe Avenue
28th Street carries U.S. 36 through Boulder, and its intersection with Arapahoe Avenue is among the city's highest-crash locations, with roughly 30 accidents reported at or near it in 2022. The 28th Street and Canyon Boulevard intersection ranks among the city's most dangerous as well. Boulder County recorded 22 traffic deaths in 2023, 19 in 2024, and 17 in 2025 through its Vision Zero program. State highways like Colorado 7, the Arapahoe Avenue extension, and Colorado 119, the Diagonal Highway to Longmont, add high-speed risk where people on foot have little protection.