TRENTON - Commuters are urged to slow down as dense fog blankets parts of central and southern New Jersey.

A dense fog advisory is in effect until 9 a.m. for Morris, Somerset, Middlesex, Mercer, Monmouth, Ocean, Salem, Gloucester, Camden, Burlington, Cumberland, Atlantic and Cape May counties.

News 12 New Jersey Meteorologist James Gregorio says the fog could reduce visibility to a quarter mile or less.

Drivers are asked to leave plenty of distance to stop.