Lane Departure Prevention System

LDPS

LDPS is a system that detects the position of the lane marking with the onboard camera for controlling the vehicular movement to keep the vehicle in the lane and tries to get the vehicle back in the lane when the vehicle is about to cross the lane marking.
But this system does not work when a driver operates a left or right turn blinker and changes the lane intentionally, such as in the case of crossing the centerline to avoid a parked vehicle.

Lane Departure Warning System

LDWS is the system which detects the vehicle’s position of the vehicle or lane marking with the camera and alerts visually or auditorily when the vehicle is about to deviate or cross the lane marking.
But it does not alert when a driver operates a left or right turn blink and changes the lane intentionally.
In some cases, the system does not respond ; refer to the caution page. (Refer to the note.)

Test Procedures / Evaluation method (From FY2017)

LDPS *1
The test vehicle is assessed at the speed of 60 km/h and 70 km/h as to whether the lane departure prevention system controls the test vehicle to remain in the lane when the test vehicle continues to travel with the same lateral velocity toward the lane marking. Higher points are obtained for the case of a small lane deviation, and lower points are obtained for the case of a large lane deviation. Even if a lane departure exceeds a certain level, points are obtained as long as the system alerts at the appropriate point.

*1 Official names:
Lane Departure Prevention System (LDPS)
Lane Departure Prevention (LDP)
Lane Keep Assist (LKA)

Test Procedures / Evaluation method (From FY2014 to FY2016)

LDWS*2 （From FY2014 to FY2016,）
The test vehicle is assessed at the speed of 60 km/h or 70 km/ h as to whether system alerts at the appropriate point when the test vehicle continues to travel with the same lateral velocity towards the white dashed lane marking, or alerts by multiple systems or alerts the direction of deviation.
Higher points are obtained for the case of a system alert at the appropriate point when the test vehicle deviates, and a) alerts in multiple ways, or b) alerts the direction of deviation, and c) the system works from a lower speed.
In this test, the lane departure prevention system is not evaluated.
*2 Lane Departure Warning System (LDWS)

Note

It is required that lane marking has to be clear as this is the system which detects lane marking by camera.
It may not detect it in case pavement is covered with snow or soil. Also the system does not operate in case when lane marking has disappeared or in the case of low speed.
Please follow the user instruction and do not rely on the system. Drive safely.

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• Don't overtrust/misunderstand the "driver assistance systems"!