The state driving ban will be lifted at 4 p.m. today.

Gov. Deval Patrick tweeted from his official account just before 1 p.m.: “Driving ban lifted immediately for Nantucket County & for all communities west of I-91; driving ban lifted statewide as of 4 PM,” Gov. Deval Patrick tweeted from his official @MassGovernor account.

Patrick signed an executive order to ban vehicle traffic beginning at 4 p.m. Friday. It was the first time the order had been signed since 1978. Penalties for driving during the ban include a $500 fine and up to one year in prison.