After the September 11 attacks in 2001 , security was increased and passenger flow through the Penn Station complex was curtailed . In 2002 , work began on a $ 100 million improvement to add security features inside Penn Station , such as lighting , security cameras , and barricades . The taxiway under Madison Square Garden , which ran from 31st Street north to 33rd Street halfway between 7th and 8th Avenues , was closed off with concrete Jersey barriers . A covered walkway from the taxiway was constructed to guide arriving passengers to a new taxi-stand on 31st Street . In addition , the direct connection escalators from Penn Station to the lobby of Madison Square Garden were closed and later removed
September 11 attacks
September 11 attacks
Pennsylvania Station (New York City)