This morning's commute was not as bad as last night but it was still slow and slick, especially if you were on Interstate 25.At least three separate wrecks crippled the commute around 6:30 a.m.A white sport utility vehicle going southbound on Interstate 25, underneath the C470 overpass, crashed into the median, sending large chunks of concrete over onto the northbound lanes.Several vehicles in the northbound lanes -- some trying to avoid the debris -- also slipped, slid and spun out on I-25. At least six vehicles were involved in a crash on northbound I-25, near the exit ramp for County Line Road. Vehicles were backed up into Castle Pines Parkway.Further up the interstate, a third crash occurred at the Hampden exit at northbound I-25.An SUV slid into the rubber and metal barrier separating the exit lane with the highway and spun into another vehicle. Two right lanes were blocked as firefighters tried to clear the crash and help the injured drivers. The extent of their injuries are not known.Because of the icy conditions and multiple wrecks, the city of Lone Tree requested that CDOT shut down southbound I-25 at C470 at around 7:45 a.m. CDOT crews closed the highway for about an hour to pour sand on the road."It's been crazy since rush hour started and people are finding out that it's really icy out there today," said Michelle Kivela, spokeswoman for the city of Lone Tree. She said there was another crash in the city of Lone Tree where the vehicle ran into the stoplight, knocking out the lights for that intersection.CDOT told drivers to expect major delays Friday morning because of multiple accidents on northbound and southbound I-25 between Arapahoe Road and County Line Road.The Douglas County Sheriff's Office was put on accident alert.