TRENTON -- A combination of this week's computer problems and the calendar have led New Jersey Motor Vehicle Commission officials to beef up staffing on Friday and Saturday.

Extra employees will be stationed at all MVC offices to help keep lines moving, spokeswoman Mairin Bellack said.

On Thursday lines in Lodi stretched out the door, causing some customers to wait more than four hours to finish their transaction, NBCNewYork.com reported.

Clients wait at the MVC office in Randolph in this 2010 photo.

The agency said around noon that a computer glitch prevented its facilities from processing license transactions. The problem was fixed about an hour later.

It's the second time this week that computer issues have hampered the agency. A similar problem occurred Tuesday morning and normal operations weren't restored until the afternoon.

Volume is always higher at the beginning and the end of the month as that's when licenses and registrations usually expire, Bellack said.

The MVC reminds customers that many transactions can be completed online 24 hours a day.

The Associated Press contributed to this report.