Meanwhile, the airport had been expanding rapidly as traffic increased from 6 million passengers in 1990 to 14 million passengers in 2000. Anticipating this growth, the Port of Portland embarked on a 20-year, $300 million phased expansion of the airport in November 1991 that expanded the main passenger terminal, rebuilt an existing concourse, and added a fifth concourse. Expecting future light rail service, the terminal expansion plans also reserved space for a station near the southern end of the arrivals hall and baggage claim area. In 1994, parking lots operating at 90 percent capacity and heavy vehicular traffic near the terminal entrances revealed that the Port's growth projections had failed to accommodate the surge in passenger traffic. As a result, the Port approached TriMet in the hope of accelerating plans to introduce light rail service to the airport.