Aiming for (semi-) autonomous vehicles?
Sounds like this is the kind of back-up data source that would aid many quasi-autonomous driver assistance systems.
If it is accurate enough to differentiate lanes, or even possibly lane-drift, it could act as a component of the position awareness/warning system. Think of drivers allowing the vehicle to drift due to being distracted, dozing, arguing with kids in the back, etc.
If we're heading for a world of 'connected' vehicles (in the sense of each transmitting its position and velocity to the immediate surroundings) it also offers options to prevent driving too close to other vehicles even in conditions where LIDAR, cameras, and other sensors become unreliable.