EL CAJON, Calif. -- Federal officials are sending two investigators to California to determine what caused a Toyota Prius to race out of control on a San Diego-area freeway.
A spokeswoman for the U.S. Department of Transportation said Tuesday that the National Highway Traffic Safety Administration will try to determine what caused the incident.
Driver James Sikes sped along Interstate 8 for 20 minutes Monday before a Highway Patrol officer helped slow down the car.
"I am still very nervous. I have an upset stomach," said Sikes.
He was driving his 2008 Prius when the accelerator became stuck. The out-of-control car reached speeds of more than 90 mph along Interstate 8, whizzing past other cars.
"I was trying the brakes," Sikes said. "I was on the brakes pretty healthy. It wasn't doing anything -- just kept speeding up, just kept going."
California Highway Patrol Officer Todd Niebert pulled alongside the Prius, and then used his loudspeaker to tell Sikes to push the brake pedal to the floor and apply the emergency brake. Luckily, it worked.
"It was a good day because it ended the way it did. No one was injured and the vehicle came to a stop," Neibert said.
In a statement, Toyota said it had dispatched a field technical specialist to San Diego to investigate the report and offer assistance.
Toyota has recalled more than six million vehicles in the U.S. since last fall because of acceleration problems in multiple models, and braking issues in the Prius.
Sikes says he's not taking any more chances.
"I won't drive that car again. Period," he said. "If I can have a problem, anyone can have a problem."
(The Associated Press contributed.)