Just thought I would pass this info on...
TTA (Triangle Transit Authority) has quite a few vanpool routes from various locations all across the Triangle and outside the city limits (like Clayton, lol). Looks like the prices range from $60-100 a month.
Might help save on same gas and a great idea for single car families!
TTA Ride Sharing :: Current Vanpool Routes & Schedules ::
Routes from the Triangle to RTP, colleges, SAS, etc.
Craigslist also has something similar in effect too.
raleigh / durham / CH rideshare classifieds - craigslist