I have one of these!
I used to work at a services off a motorway. From my village to the services was six miles, along a short section of minor road to the junction on. Once I got on the road, the next junction was where my work was (and the same in reverse) The longest it ever took me one was was 40 mins, and that was in horrific weather.
I left work at 2pm. I remember the time because I'd got out a bit early and had rang my partner to ask if he wanted to take the dog to the beach. It was 7pm by the time I got home and my partner had been totally freaking out. He'd tried to call me but the calls were going to voicemail, had rang work who knew him and confirmed when I left. From his point of view I'd just vanished for five hours. He was on the phone with the police when I arrived home.
The really spooky bit is that it felt like a perfectly normal drive to me. Left the car park at work, drove back at a normal speed, got home. I had a new CD and can remember skipping a song back to listen to again.
It's not even like I could have stopped somewhere and fallen asleep because I'd have been in a live lane and it would have caused an accident. Hadn't missed the junction home or anything, just a trip that should have taken 30 mins or so took five hours.
That still creeps me out!
(And weirdly, something similar happened again driving home from a trip to Edinburgh with my sister.
We left midday and it took us hours to get back to Hartlepool despite there being no delays or anything unusual happening. We did stop off for a wee break but literally nipped into a McDonald's, grabbed a coffee and got back in the car. It was 12:30 or so when we left the city and nearly 8pm by the time we got home. Should have taken around three hours for a clear run which is what it felt like we had!)