The most dangerous roads for riders
C-470, US-85, and I-25
State Highway 470 (C-470) runs along the northern edge of Highlands Ranch as a freeway maintained by CDOT. US-85 (Santa Fe Drive) runs along the western edge and is a designated dangerous corridor. The South Broadway and C-470 interchange has been ranked the number one most dangerous intersection in Douglas County by the Douglas County Sheriff, where two road workers were killed in 2012. Interstate 25 runs just east of Highlands Ranch through Lone Tree, and the Lincoln Avenue and RidgeGate Parkway interchange is a documented high-accident location. SH-177 (Broadway) runs 6.1 miles north from its southern terminus at SH-470 in Highlands Ranch. Elevation in the community ranges from approximately 5,800 to 6,200 feet, which means freeze-thaw ice conditions are common on overpasses and ramps after dark from fall through spring.