Train Tunnels

December 22, 2011, 7am PST
LA to SF in 2 hrs, 40 mins? That promise in the proposition that voters approved in 2008 could be the train's undoing, as to keep that schedule it will require more expensive design, including viaducts and tunnels, than would otherwise necessitate.
Los Angeles Times
January 7, 2010, 10am PST
This video from <em>The Boston Globe</em> takes a look into the world below the city's subway system.
The Boston Globe