They're called railroad ties
What name is given to a railway in which a cable attached to a pair of vehicles on rails moves them up and down a steep slope, the ascending and descending vehicles counterbalancing each other?
Elizabeth II and which other head of state opened the Channel Tunnel railway tunnel that connects Folkestone (UK) with Coquelles (France) beneath the Channel/La Manche?
What was the name of George Stephenson's first steam engine, which first ran on the Manchester and Liverpool Railway in 1830?