It’s a rule of the road: slow down and move over when passing emergency vehicles parked on the shoulder.
State troopers will be looking for drivers who don’t follow that rule this weekend. Not 
respecting fire trucks, ambulances, tow trucks, police cars, etc. performing their duties can result in a fine — unless the emergency worker is endangered by that disrespect, in which case drivers can face jail time and a suspended license.
Protect yourself and our emergency workers! Slow down and scoot over.