Joi Ito points us to one gadget that Bandit (as in “Smokey and the”) could have really used: the CellStar SKY-230DL, a radar detector with built-in GPS.
It knows where speed traps are and lets you know 2 km before you get there. (In Japan, we have automated speed traps that take your picture and send you the ticket in the mail.) It also lets you program new information. For the tunnel exit based traps, it lets you know before you enter the tunnel, etc. It also detects police radio and figures out whether they are heading towards you in the same direction or on the other side of the road. It has a variety of special warnings for stealth pulse radar detection, etc. These things have come a long way since the last radar detector I bought.