Why don't car creators put industrial strong magnets onto the bumpers?
example put positive in the front, negative at the back... that way if a car comes too close and instead of hitting the car in the front, it will push it away.

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edit

New and Improved Design

Forever takkan langgar


There are a lot of different types of magnets wan lah...
some magnets are powered by electricity..... so if you turn off your car (or turn off magnet with a button) then u can park.

and magnets not nessarily heavy... u know static magnet?
last time in class u go rub rub rub the ruler with a cloth, then it will suck small bits of paper on to it?

I'm no magnet scientist, i just gave an idea... it's up to the scientist to figure out which one the best to use.

NEW IDEA !!!
2nd idea... we can all drive floating cars...
but requires the government to change the entire road.

VERY COSTLY.