34 | Driver’s Manual not get completely through the intersection.  Wait until traffic ahead clears, so you do not  block the intersection. This law requires every driver to exercise care  to avoid colliding with an authorized emergen- cy or hazard vehicle that is parked, stopped or  standing on the shoulder or any portion of the  highway with its emergency lights or one or  more amber hazard lights activated. Drivers must  reduce speed on all roads when encountering  such vehicles, but on parkways, interstates and  other controlled access roads with multiple lanes,  drivers are further required to move from the lane  adjacent to the emergency or hazard vehicle  unless traffic or other hazards prevent doing so  safely. Drivers are also required to move over  for vehicles with blue and green lights which are  described in the next section. Violations of this  law are punishable as a moving violation. You must yield the right-of-way to fire, ambu- lance, police and other authorized emergency ve- hicles when they respond to emergencies. They  will display lights that are flashing red, red and  blue or red and white and/or may sound a siren  or air-horn. When you hear or see an emergency  vehicle heading toward your vehicle from any  direction, safely pull over immediately to the right  edge of the road and stop. Wait until the emer- gency vehicle passes before you drive on. If you  are in an intersection, drive out of the intersection  before you pull over. You must pull over and stop for an emergency  vehicle even if it is headed toward you in the  opposite lane of a two-lane roadway. If you hear a siren or air-horn close by but do  not know exactly where the emergency vehicle  is, you must safely pull over to the right-side edge  of the road and stop until you are sure it is not  headed toward you. An emergency vehicle that uses lights and a  siren or air-horn can be unpredictable. The driver  can legally exceed the speed limit, pass red lights  and STOP or YIELD signs, go the wrong way on  one-way streets and turn in directions not normal- ly allowed. Although emergency vehicle drivers  are required to be careful, you must be cautious  when an emergency vehicle heads toward you. Always signal before you turn or change lanes.  It is important that other highway users know your  intentions. The law requires you to signal a turn or  lane change with your turn lights or hand signals  at least 100 feet (30 m) ahead. A good safety tip  is, when possible, to signal your intention to turn  before you begin to brake or make the turn. The  proper hand signals are shown on the next page.  Personal vehicles driven by volunteer fire  fighters responding to alarms are allowed to  display blue lights and those driven by volunteer  ambulance or rescue squad members can display  green lights. Amber lights on hazard vehicles  such as snow plows and tow trucks warn other  drivers of possible dangers. Flashing amber lights  are also used on rural mail delivery vehicles and  school buses to warn traffic of their presence. The  vehicles that display blue, green or amber lights  are not authorized emergency vehicles. Their  drivers must obey all traffic laws. While you are  not required to yield the right-of-way, you should  yield as a courtesy if you can safely do so. TURNS BLUE, GREEN AND AMBER LIGHTS EMERGENCY VEHICLES Move Over Law • Be alert to cross-streets or offset intersec- tions, so that you don’t cause gridlock by  blocking another street. • A driver who approaches a traffic circle or  rotary must yield the right-of-way to drivers  already in the circle. (For more information  on how to drive in a rotary see “How to  Drive Through a Roundabout” in Chapter 8  of this manual.)