In the 150-acre terminal where Toyotas are unloaded, there is a sea of Corollas, Camrys and RAV4s. The mere presence of so many cars is not unusual, given that Toyota brings in 250,000 cars a year in biweekly shipments. But in a sign that something is amiss, dozens of tractor-trailers that transport new cars to dealers sat empty last week amid the rows of Toyotas.

Kurt Golledge, 48, was one of just two truckers loading his green, 75-foot-long hauler with cars last week. Mr. Golledge said eight of his colleagues were laid off this month because Toyota dealers did not want more deliveries.

“I was dropping cars in Henderson, Nev., about a month ago and the dealer told me: ‘Take ’em somewhere else and dump ’em,’ ” said Mr. Golledge, who works for a company called Allied Systems. “All the dealers are telling us the same thing.”

Auto dealers typically place orders with manufacturers months in advance, but they can modify their orders to receive fewer vehicles.

“The ships keep coming, but there’s nowhere for the cars to go,” Mr. Golledge said. He said he believed the vehicles he was loading would be his last before he was laid off, and he was already considering where he might find a new job.

While shipments for some items have slowed, the cars have kept coming in at their regular pace partly because the auto factories can take months to adjust to changes in demand. Toyota is wrapping up a deal to use six acres to park cars at the port, and is seeking more space.