Though billions of dollars have been spent to improve LAX’s terminals, operator Los Angeles World Airports still has significant work to do to address impending traffic jams, according to a statement released Monday by Los Angeles City Controller Ron Galperin.

An industrial, economic and administrative survey conducted by auditors from KH Consulting Group in Century City documented that the $5 billion overhaul of Terminal 2, construction of a consolidated rental car facility, and a 2.2-mile people mover linking the airport to a nearby Metro station would greatly increase traffic and reduce parking in LAX’s Central Terminal Area.

“Traffic will get worse before it gets better,” said Galperin, whose office administered the survey along with the mayor’s office and City Council. “Any goodwill we’ve engendered with passengers will quickly go away if as Los Angeles World Airports doesn’t adequately address the traffic and parking problems that its large-scale construction projects are going to create.”

The survey also revealed that LAX has insufficient staff to handle these issues and lacks resources dedicated to traffic engineering. It warned of the potential for breakdowns in some key guest service areas, including the handling of disabled passengers.