Though some localities, including Baltimore city and Harford County, have closed the roads under their control to non-emergency vehicles, Maryland has not done the same with state roads.

Maryland Transportation Secretary Beverly Swaim-Staley explained that the state has hesitated to close roads entirely because of the state's location on major interstate commerce routes and the difficulty of enforcing such a ban.

"We would have horrendous issues on our borders if we were trying to close down our roads. Obviously, we don't want people on them," she said.

Swaim-Staley said the state and local govenments don't have the law enforcement resources to pull over vehicles to enforce such an order.

Even without the order, traffic remains light on Interstate 95 and other roads around the state.