I've seen plenty of stupid drivers. i've grown up in the UK, and driven all over the UK and used a very nice map, a nice comprehensive map. I rarely got lost, and when I did, it was because my passenger didn't know how to read it. If I was driving solo though, I'd plan my route beforehand, and write out turn by turn directions in BIG LETTERS on paper next to me, and include the map reference points as well, if I stop. It worked well, and i rarely got lost.
I live in the US now, and again, rarely get lost. It's mainly spacial awareness
I had a friend who just qualified as a truck driver 18 months ago, and I kitted out his cab with all his electrics for him, and off he went on a weeks run, with his map book. When he was on the road, he bought a USB GPS unit, and truck mapping software. He felt it was easier to do this, and it supposedly keeps track of where the areas are that truck's can't pass. however despite the software being able to accept driver amendments, and upload them, the drivers have to pay to get everyone else's updates. Yes, the company charges for everyone else's work updating the map.
Myself, I got given a usb gps unit a few months back, and have used it twice. Mostly I use it as a check on my speedo (so i'm sure when the speedo says 60mph, the car's actually doign 55), but sometimes if it's a place I've never beento, it's a check. last week I used it to drive in and through Atlanta, avoiding all the bad traffic spots I know of during evening rushhour (the interstates). My MS streets and trips is a little off (nothing more annoying that hearing 'off route' when you're between junctions on a road).
90% of the time, the GPS unit stays in the glove box, they're just not that usefull. If you're going to a specific address in an area you've never been, it's got its uses, but I don't slavishly trust it. Mostly, it's a check, and any decent program will allow for recalculation if you go off-route, but very few allow for blocking an area off. (a feature i found very handy in autoroute for my Amiga - often when on a M6 to london run, so i'd take me the M5 way to the M40, rather than the other way around Brum.
hell, they could even make weight-cameras, not hard to take the piezo-strip camera concept, and make it a weighbridge-based camera. That would require, though, a 'safety camera partnership' to actually focus on safety, though, which is a bit outside their area of knowledge.