A significant traffic disruption unfolded on Interstate 25 in Douglas County when a three-vehicle collision shut down southbound lanes Saturday evening. According to Denver7, the incident was reported around 7:22 p.m. near the 182-mile marker, just south of Castle Rock. The southbound side of the interstate did not fully re-open until hours later, with lanes starting to gradually become accessible by 9 p.m. and complete reopening reported by the Colorado Department of Transportation at 10:30 p.m., as stated by 9News.