Portable

Bunch of morons commenting there.

But i did like, talking of the US:

Your roads are huge and still you manage to crash into everything you come across so I don’t think a laser gadget would make any difference. However I like the idea

I love the artist’s impression of what it would look like. Of course in reality you’d get a flickering wobbling mass off fuzzy red light wobbling in tune with the rider. It’s also fatally flawed because it says to the driver, providing I stay clear of the patch of light, the cyclist will be happy with the overtaking space i’ve given.

Unless of course it’s a really powerful laser that melts cars that cross the beam. That would be ace.