Self Driving Cars

How does a driverless car see the road?

This video was about how cars could potentially be driver less.  The car can detect anything in its way and can see thing far away from it.  Normally you couldn't see 100 feet to the side of you but the driver less car can.  It is advanced in many ways.  The program is possibly flaw less.

I wonder how long it would take to make a model of the car?

What is the best way to keep the people in the car safe?