The San Francisco-based Electronic Frontier Foundation, a nonprofit group that focused on defending civil liberties, objects to police holding onto such records indefinitely.
"It's a real threat to privacy that we allow our government to collect this kind of information on us - on where we travel and where we are going at any given time," said Jennifer Lynch, a senior staff attorney at the foundation.
"Many of these law enforcement agencies will drive around parking lots and collect license-plate data," Lynch continued. "That parking lot might be for your doctor or it might be for your church. I don't think that law enforcement and the government should have a right to have that information on us."