UTICA, NY (WKTV) -  Emergency crews re-opened the 12-south on-ramp from route 790 in North Utica around 12:15am after four cars crashed on the bridge. Representatives from the Utica Police Department say they don't know what exactly caused the crash, but say the roads were iced over. The ramp remained closed for 45 minutes while crews sanded and salted the roads. Two people were rushed to the hospital due to injuries from the accident. Officials are reminding travelers to take extra time in their morning commute, as roads could continue to freeze overnight. Tune into NEWSChannel2 Daybreak and Sunrise for updated coverage.