Technology Review: Motorists turn to carpool sites as gas prices rise

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The number of daily visitors to eRideShare has jumped about threefold since February, when gas started to climb from the $3-a-gallon range. A rival site, Carpoolworld.com, had about 4,400 new U.S. registrations in both June and July, compared with some 800 in February.
Although some people turned to these sites long ago to help reduce pollution or take advantage of faster, high-occupancy vehicle lanes that require at least two occupants, the pocketbook has been the largest influencer of all.

Technology Review: Motorists turn to carpool sites as gas prices rise