Slow moving traffic

 A traction engine or steamroller are not an uncommon sight locally, many of the of steam engines operated by members of the South Hampshire Historic Steam & Engineering Society, based at  Bursledon Brickworks Museum are taken out for a "run" either as part of their maintenance or for the simple pleasure of piloting one of these beautiful machines along the highways and byways.

With working speeds of three or four miles an hour the pace is leisurely and rightly so if you imagine the braking force required to stop one. A run around the block of 10 or 12 miles is going to take a while including a couple of hours to fire and steam up, but maybe that's the whole point.