I think it has 4, 2 going each each way. One for the actaul train, and another that runs beside it for maintenance, excavation, emergency services etc.
They travel at 118.3 miles per hour.
The Chunnel is an out-of-date name for the Channel Tunnel.
The chunnel comes out in Coquelles, a village near Calais.
The chunnel (actually the Channel Tunnel) connects England to France.
The Chunnel is a name that was sometimes used for the Channel Tunnel before it was built.
nothing
The Chunnel was excavated into chalk by the tunnel boring machines then was reinforced with concrete.
The Chunnel runs underneath the English Channel, connecting England and France.
Europe
It is in Europe.
It is 678 miles or 1,091 km not counting the ferry or chunnel.
The Chunnel!