3 ms·
It is not, per general EU regulations no 'single bore' tunnel can be longer than 1km (0.62miles0. Tunnels that are longer than that, either have to be double
by ardit33 8y ago
It is not, per general EU regulations no 'single bore' tunnel can be longer than 1km (0.62miles0. Tunnels that are longer than that, either have to be double tunnels, with escape doors between them, or one large tunnel and an emergency smaller one.
This looks the size of a emergency tunnel. Still, the cost of building it seems pretty low. Boring Co could build two side by side, (one for each direction) and have emergency hatches between them.
- npunt 8y agoYeah practically I think there’s almost always going to need to be two tunnels side by side, given density of stations and the need for long distances to slow vehicles down as they exit from the main tunnel (up to 150mph) to the stations. It may be that stations wind up quite a bit denser than one every mile- certain parts of LA could use them every 1/4 mile really.
- agumonkey 8y agoBut would it still be that cheap with escapes and links ...