Diane Berger has a Chevy Volt plug-in hybrid with green carpool stickers that allow her to legally drive solo in California diamond lanes. But as the software engineer commutes from the East San Jose ...

All good things must come to an end, and so it is with the green stickers that give plug-in hybrid drivers access to California's freeway carpool lanes with just one person in the car. A total of ...

Access to carpool lanes on California's legendarily crowded freeways is a big perk. So is getting a check in the mail that cuts the purchase cost. These incentives were successful in spurring sales of ...

You've seen those cars with the HOV access stickers cruising down the carpool lane with only a driver inside -- their time is almost up. John O'Dell has been covering green and alternative fuel cars ...