Complete radar the size of a fingernail!:

http://phys.org/news/2012-11-low-cost-finger-nail-sized-radar.html

I will cost 1 Euro!

Originally posted by sonhouse
http://phys.org/news/2012-11-low-cost-finger-nail-sized-radar.html

I will cost 1 Euro!

Fit them down the side of lorries to prevent them side swiping people.

Originally posted by googlefudge
Fit them down the side of lorries to prevent them side swiping people.

Or cars.