I drove for 7 hours from Manchester to Kent...
and cannot remember even leaving Manchester. Only recollection was about 10 miles from home. I know I was stuck in traffic on a motorway but which one still eludes me.

That's 275 miles of not paying attention. Scares just to think of it. Got very cautious for months after when driving anywhere.
( NooShmoo It's a fantazmagorical pile of ultra bollocks, Thu 21 Jul 2011, 19:19, 2 replies)

That happens to me quite regularly too.
It's probably not wise to drive while sleep deprived, but I do suffer from insomnia quite badly and it's usually after a few bad nights. I'm still aware of what's going on, but if nothing interesting happens I just don't register it.
(anonymousreality tickled your fancy on, Fri 22 Jul 2011, 2:15, closed)

Motorway driving does that to me
because I find it intensely boring.

If I'm remotely tired or find I've gone 20 miles without realising it, my best strategy is to get off the motorway at the next exit and use A and B roads instead.

They take longer, but they're far more interesting and there's more to do as a driver than just trying not to move your foot too much, so it's a lot easier to stay focused and awake.
( shinyshinyscalp less a man, more a way of life, Fri 22 Jul 2011, 13:33, closed)