SEA-TAC AIRPORT - Security procedures have been tightened at Seattle-Tacoma International Airport following an incident in which a man was able to drive his van onto a runway without having his vehicle searched or his identity checked.

The incident happened several days ago in an area reserved for corporate jets. At that time, there were no local or federal requirements to check IDs or screen vehicles at the entrance to the corporate terminal.

Chris Clodfelter said he was waved onto a runway on the terminal's south side without question, and said he could've gotten away with anything.

"There was no security," he said. "And we're in a running vehicle on an apron at Seattle International Airport and could be out on the active runway in less than 60 seconds."

After the incident, security officials took a look at their procedures, said Sea-Tac spokeswoman Terri Anne Betancourt.

On Monday officials changed policies, and they no longer allow any vehicles on the tarmac, Betancourt said. Passengers now have their ID checked at the corporate gate and have to park their vehicle outside, then walk in.

Even before the procedures were tightened, airport officials said Clodfelter was watched the entire time he was on the runway.

There also said there has never been a security lapse in this part of the terminal, officials said.