Preliminary Worries with the Pennsylvania Railroad Tunnels

The Pennsylvania Railroad announced they would be tunneling into Manhattan. More

When the Pennsylvania Railroad announced they would be tunneling into Manhattan, rather than building a bridge, people were stunned. Tunneling underwater was known to be dangerous, and once they were built, the tunnels would need to withstand hundreds of trains traveling through them every day. With a typical Pennsylvania Railroad passenger train weighing 700 tons, this was no small challenge.

AIR DATE 2/18/14