The Velite concept car is on display at a Buick news conference, Tuesday, March 18, 2008 in New York. (AP Photo/Mary Altaffer)
The Riviera concept car is on display at a Buick news conference, Tuesday, March 18, 2008 in New York. (AP Photo/Mary Altaffer)
The interior of the Velite concept car is seen on display at a Buick news conference, Tuesday, March 18, 2008 in New York. (AP Photo/Mary Altaffer)
The Chevy Volt is on display during the Chevrolet news conference at the New York International Auto Show Wednesday, March 19, 2008. (AP Photo/Mary Altaffer)
The Jeep Renegade concept vehicle is shown at the New York International Auto Show on Thursday, March 20, 2008. The hybrid diesel and lithium-ion motor will give 110 miles-per-gallon. (AP Photo/Mark Lennihan)
In a photo provided by the Ford Motor Co., a Transit Connect Taxi concept is shown. The automaker is expected to unveal the vehicle at the New York Auto Show on Wednesday morning. (AP Photo/Ford Motor Co., ho)
The 2009 Honda Fit is introduced during the Honda news conference at the New York International Auto Show Wednesday, March 19, 2008. (AP Photo/Mary Altaffer)
The Hummer HX prototype on display at the New York International Auto Show, Wednesday, March 19, 2008. (AP Photo/Evan Agostini)
The 2009 Hyundai Genesis Coupe is presented during the Hyundai news conference at the New York International Auto Show Wednesday, March 19, 2008. (AP Photo/Mary Altaffer)
The 2009 Lamborghini Gallardo LP 560-4 is on display at the New York International Auto Show Wednesday, March 19, 2008. (AP Photo/Mary Altaffer)
The Speed Racer Mach 5 on display at the New York International Auto Show, Wednesday, March 19, 2008. The Mach 5 is featured in the upcoming Warner Bros. live action feature "Speed Racer".(AP Photo/Evan Agostini)
The Milner Motors AirCar on display at the New York International Auto Show, Wednesday, March 19, 2008. (AP Photo/Evan Agostini)
The iMiEV concept car is seen during a test drive through the streets of Manhattan, Tuesday, March 18, 2008 in New York. (AP Photo/Mary Altaffer)
The Mitsubishi Miev electric car is displayed at the New York International Auto Show on Thursday, March 20, 2008. (AP Photo/Mark Lennihan)
The interior of a Nissan Denki Cube electric concept car is seen at the New York International Auto Show on Wednesday, March 19, 2008. (AP Photo/Mark Lennihan)
The Nissan Denki Cube electric concept car on display at the New York International Auto Show on Wednesday, March 19, 2008. (AP Photo/Evan Agostini)
In a photo provided by General Motors, a 2009 Pontiac Solstice Coupe is seen. Pontiac is unveiling a hardtop coupe version of its eye-catching Solstice roadster at this week's New York International Auto Show. The 2009 Pontiac Solstice coupe, based on a concept Pontiac revealed in 2002, is set to hit dealerships in early 2009. (AP Photo/General Motors, ho)
The Hako Concept car is presented at the Scion news conference during the New York International Auto Show Wednesday, March 19, 2008. (AP Photo/Mary Altaffer)
A Spyker C8 Spyder is shown at at the New York International Auto Show on Thursday, March 20, 2008. The sports car, capable of speeds up to 187 mph, has a 4.2 liter V-8 and sells for $236,000. (AP Photo/Mark Lennihan)
An entry into the Progressive Automotive X PRIZE contest is on display at the New York International Auto Show Wednesday, March 19, 2008. (AP Photo/Mary Altaffer)
An entry into the Progressive Automotive X PRIZE contest is on display at the New York International Auto Show Wednesday, March 19, 2008. (AP Photo/Mary Altaffer)
