11.   Indeed, the Hummer can seem downright overpowering compared with other passenger vehicles, raising the issue of safety.

12.   It has a specially modified engine that provides peak power at a different end of the spectrum than in a passenger car vehicle.

13.   Last week, a student asked me what I thought was the single most important pollution control device on any passenger vehicle.

14.   New state rules will allow all but the heaviest personal-use pickups to be registered as passenger vehicles.

15.   Not all passenger vehicles are created equal, especially when it comes to the amount of pollution that flows from their tailpipes.

16.   Passenger vehicles that used to speed through the border in a matter of minutes were forced to wait up to four hours.

17.   Pathfinder has rear-seat headrests, something long lacking in these truck-based passenger vehicles.

18.   Private passenger vehicles will enter the airport as they did before the closure -- via Century and Sepulveda boulevards.

19.   Sales of new passenger vehicles, particularly sport utility vehicles, minivans, and pickup trucks, are breaking records.

20.   Still, despite continued heavy incentive costs, demand for passenger vehicles is expected to weaken this year.