First responders are asking drivers to slow down after a crew in Allegheny County was almost hit by a truck sliding on snow covered roads. Collier Township EMS posted the video to Facebook Wednesday as a reminder for drivers to use caution if they need to be out and about. Officials say crews were on scene of a minor crash and were checking on the occupant for injuries when a truck came sliding into one of their emergency vehicles nearly hitting one of them. First responders across Pennsylvania were kept busy Wednesday as a snowstorm made its way across the state.