We were all too eager to hit the road when we turned 16, and now that we're a little a lot older, we find ourselves decidedly less stoked at the idea of sharing the road with teens barely out of driving school. We suppose that's where GreenRoad's in-vehicle data recorder (IVDR) system comes in.

GreenRoad specializes in trucker safety, but has turned its attention to teens with a system that essentially grades the driver. It does this by monitoring unsafe driving decisions, like overly sharp turns, heavy acceleration, and abrupt braking, which, if you're a passenger, has an unsettling effect on your lunch.

The IVDR analyzes the above information an then lets the driver know how he or she is doing at any given time by displaying a red (bad), yellow (OK), or green (good) light. And because the IVDR uses an accelerometer, it's feasible something like this could be ported or developed in a smartphone.

Image Credit: insuringteendrivers.com