Since 1970, the left lane of the three westbound lanes is converted during the morning rush hour to a reversible bus lane, known as the "XBL", or Exclusive Bus Lane. The PANYNJ is responsible for daily operation of the XBL, including its opening and closing, removal of disabled vehicles, and response to emergencies. It is used by buses headed east from the New Jersey Turnpike and Route 3, mainly to the Port Authority Bus Terminal just past the Lincoln Tunnel in Manhattan, serving over 1,800 buses and 65,000 bus commuters on regular weekday mornings, (6-10 a.m.). This bus lane is the busiest in the United States. Route 495 is a busy route that carries approximately 74,571 vehicles at its western terminus and approximately 119,432 vehicles by the time it reaches the Lincoln Tunnel.