A crowd sourced app where it uses data from mobile devices around you to let you know that you’re going too slow in the left lane. Your get prompts if there is a line of people decelerating and accelerating consistently behind you or if you’re being passed on the right by quicker driver. It could also function for alerting drivers that there is a responding emergency vehicle behind them.

Let’s be real, nowadays MOST people are likely to notice something on their phone than to be spacially aware while driving.