> Testing for the safety of lane-keeping systems is more challenging than other crash-avoidance systems, because it must be actively engaged by the driver as op

> Testing for the safety of lane-keeping systems is more challenging than other crash-avoidance systems, because it must be actively engaged by the driver as opposed to constantly monitoring for danger, like an imminent forward crash. Not everyone with lane-keeping systems engages them, and even those who do don't engage them on every journey. Exactly. I have lane centering in my car, and ONLY turn it on for highway driving. I don't feel my car's system is very effective on city streets, and in any case you mainly need that kind of help on long, mind-numbing journeys (where it's fantastic and makes driving much less stressful).