[trollface]

A laser detector is useless, if you pick up the laser, you have already been tagged. It will just tell you, you are about to get a ticket because the gun was pointed at you.

Lasers don't spread like radar.

A jammer on the other hand, gives you a few secs to slow down before it allows them to get a reading. Vancouver uses Dragon Eye laser guns. The states still use some radar, but it's not legal in some states so research before you run around with one.