The lane departure warning symbol plays an important role in safely driving around the Missoula and greater Missoula County area. The purpose of the lane departure warning light informs a driver that the vehicle is veering or leaving a lane with detectable lane markers. In many vehicles the lane departure warning symbol is accompanied by a chime sound. When continually light, Transolution Auto Care Center recommends scheduling an appointment to find out if there is a faulty system in need of servicing.