Lane departure warning system and a method for a lane departure warning system

A lane departure warning system (2'), comprising a lane monitoring unit (4') for delivering a location signal (6') which indicates the vehicle's position relative to the lane markings (22), a lane deviation unit (8') for calculating the vehicle's current deviation and the direction of deviation, and generating deviation signals (10'), and an alarm unit (12') for generating alarm signals (14',16'), comprising a first alarm signal (14') arranged to be generated if the vehicle's current deviation exceeds a first threshold value (T1,T1'), wherein said alarm unit is adapted to generating on the basis of said location signal a second alarm signal (16') which indicates the vehicle's position relative to the lane markings. The second alarm signal (16') is an acoustic signal and the vehicle's position relative to the lane markings is indicated by altering the balance of the vehicle's sound system.