ELI5: Explain Like I'm 5

Electronic Route Guidance System

An electronic route guidance system is like a GPS for cars. It helps you get from one place to another by computing the best route from where you are to where you need to be.
It figures out the best way to get there, giving you instructions and turn-by-turn directions to help make sure you don't get lost. By following the directions, you should reach your destination quickly and safely.