The Maryland Senate unanimously passed a bill Thursday that would require motorists to move into an open lane away from tow trucks that are attending to roadside emergencies.

Tow truck operators offered dramatic testimony of close calls, injuries and fatalities on the roadside in asking lawmakers for a “move over” law similar to the one that now applies to police and other emergency vehicles. Violators would face a fine of as much as $500.

A House of Delegates version of the bill was passed March 6.