High-Crash Corridors
High-crash corridors: I-25, US-85, and State Highway 86
Interstate 25 (concurrent with US Route 87) is the spine of Castle Rock, entering and exiting town through four CDOT-maintained interchanges: Exit 181 at Plum Creek Parkway, Exit 182 at Wolfensberger Road and Wilcox Street, Exit 184 at Meadows Parkway, Founders Parkway, and State Highway 86, and Exit 185 at Castle Rock Parkway. About 80 percent of Castle Rock residents commute outside town for work, producing heavy peak-hour I-25 traffic and sustained rear-end crash risk morning and evening. US-85 runs along Meadows Parkway approaching the I-25 interchange, and State Highway 86, known locally as Founders Parkway, begins at the Exit 184 interchange and runs eastward toward Franktown. The Exit 184 area near the Outlets at Castle Rock concentrates turning-movement conflicts and pedestrian traffic. Castle Rock's elevation on the Palmer Divide also produces localized ice, fog, and Chinook wind conditions that catch drivers off guard. A driver who can manage inattention on a quiet road cannot at these speeds.