High-Risk Roads
US 36 (Denver-Boulder Turnpike) and Northwest Parkway
US 36, the Denver-Boulder Turnpike, is the dominant freight and commuter artery through Broomfield. Freezing drizzle that forms thin invisible ice before snow accumulates has caused documented fatal crashes near the Church Ranch Boulevard exit, reported by CBS Colorado. The Northwest Parkway, a 9.05-mile limited-access toll road with both termini in Broomfield (western: US 36 at Interlocken Loop; eastern: I-25/E-470 interchange), has produced road-rage and high-speed ramp crashes, including a fatal and serious-injury event at the southbound I-25 to southbound E-470 ramp documented in April 2024. I-25 and US 87 form Broomfield's eastern boundary and carry heavy north-south freight volume.