Land transportation reached a new record when the Flying Scotsman became the first steam locomotive to be authenticated as reaching 100 mph. While slow by today’s standards (with the TGV being clocked at 357 mph in 2007), this was phenomenal back in 1934 when many goods were still shipped horse and buggy (with the average walking speed of a horse pulling a cart being 4 mph) and the average speed of a railroad freight shipment (at least before the introduction of the streamliner) was estimated to be about 5 mph (Source).
I’ve got the freight train blues
Oh, lawdy mama got ’em
On the bottom of my ramblin’ shoes
And when the whistle blows, I gotta go
Baby, don’t you know
It looks like I’m never gonna lose
The freight train blues