I overtook a old guy yesterday, first cuz he was really slow setting off from a intersection and then going 70 tops on 80 km/h highways.
So i did and i soon opened up a gap between me and him, only to 10 minutes later have him barreling up real fast behind me when i was doing 87, so i estimate his speed must have been near 100.
I cant blame him though, its the same stretch of road where i also get to go fast often, i think its downhill a little but you just dont notice it, but i too can go fast there as evident of my 87, and like the old guy i have even gone faster before i noticed there was some sort of speed issue on that stretch of road..
The old guy was also weaving some, but at least not as bad as phone junkies can do.