The «Active Steering» wheel detects lane markings on the road and will keep the car in the requisite lane if the car is drifting out of them. (motorbeam.com)
This system uses infrared sensors to monitor lane markings on the road surface, and a vibration mechanism in the seat alerts the driver of deviations. (en.wikipedia.org)
It will provide lane departure alerts when lane markings are crossed. (chevrolet.com)