Faced with field office closures most Fridays, the Department of Motor Vehicles is pushing people to do business online ... Many have. DMV reports 23 percent of transactions now happen online – at dmv.ca.gov – rather than in field offices. Most popular: vehicle registration renewals, 6 million this year ... Many haven't, however. Wednesday afternoon, nearly every seat was taken in the waiting areas of the south Sacramento office ... "Actually, this is not that busy," office head Gwendolyn