The majority of LDW systems currently available alert the driver via any combination of the following:
Warning tone resembling the sound of a vehicle driving on a physical rumble strip. This can also be oriented to only sound on the side of the vehicle that the lane departure is occurring.
Visual warning on the instrument panel. This can be integrated into the driver’s dashboard or located separately.
Heptic feedback via vibrating the steering wheel or driver's seat, which can vibrate on the side of the seat that the lane departure is occurring.
It is also important that the driver is informed when the system is not functioning correctly or temporarily unavailable.
One complication in the design of the systems is that an effective lane departure warning system will need to function irrespective of the lane boundary type, while the boundary geometry differs from country to country.