Interesting BoB photo

[brando]

Yes, the vehicle shown is indeed a steam-roller, as opposed to a steam traction-engine which is a different beast altogether. Traction is the key word, as the smooth-wheeled 'roller' couldn't pull the skin off a rice pudding It was very effective at compacting infilled bomb-craters though.

Steam-powered vehicles were still common in this era. Steam traction engines were used to power threshing machines at harvest times - and usually towed these threshers from farm to farm. When I was young it was still possible to find signs where road-bridges crossed railways, warning of the maximum speed for 'locomotives' crossing the bridge. I think they were limited to 4 miles per hour.