Emergency vehicles should be given right of way all the time. They cannot control the intersection lights but carry their own different types of warning signalswhich can be purchased online at well known stores such as Prestige Emergency Lights and are responsible touse these lights wisely.
For emergency vehicles to change the traffic lights by remote.
If you have ever approached a large intersection in a sizable city, but the traffic lights are all blinking red, this would be a System is out of control situation. All vehicles must stop at the intersection barrier lines (crosswalk), then proceed when it is safe. When the System is in control, the intersection's right-of-way is being controlled by the lights, and the vehicles are flowing through the intersection in one direction while the vehicles in the crossing direction are waiting their turn... the system controls the flow.
Emergency vehicles lights are used to get the attention of other vehicles and for them to move out of the way. This is because such vehicles are usually going to an emergency and need to get there as soon as possible, therefore they need a special signal for other vehicles to move out.
When approaching an intersection with no signs or traffic lights, you should treat it as a four-way stop. This means coming to a complete stop and yielding to any vehicles that arrived before you. Proceed through the intersection in the order that vehicles arrived.
I did some online research on your question. I found some useful info on your states official Dept. of Transportation site. What I found is here: http://www.legis.state.wi.us/Statutes/Stat0347.pdf
If you come to an intersection without signs or lights, you should treat it as a four-way stop. This means that you should yield to any vehicles that arrived before you, and then proceed through the intersection in the order that vehicles arrived. It is important to use caution and follow the rules of the road to ensure safety for yourself and others.
When an emergency vehicle with a siren and flashing lights approaches while you're crossing an intersection, you should safely and promptly move to the side of the road to allow the vehicle to pass. If you're already in the intersection, proceed to clear it as quickly as possible without blocking the emergency vehicle's path. Always be aware of your surroundings and follow any additional instructions from emergency personnel.
When you encounter an emergency vehicle with its siren or lights on, you should pull over to the right side of the road and stop to allow it to pass safely. If you're in an intersection, proceed through it and then pull over once clear. Always stay alert for additional emergency vehicles that may follow. It's important to remain calm and ensure the safety of all road users.
They are normally used by emergency vehicles. They are to attract attention of drivers who do not pay as much attention. It is hoped to allow emergency vehicles the ability to get through traffic better.
They are allowed to exceed the speed limit when Lights and siren are all on.
WigWag lights - usually used on emergency vehicles when one headlight goes on and the opposite one goes off (flashes)
When approaching or being approached by an emergency vehicle using its lights and siren, you should safely pull over to the right side of the road and stop until the vehicle has passed. If you are in an intersection, proceed through it carefully and then pull over. Always remain aware of your surroundings and watch for any additional emergency vehicles that may be following. It's crucial to yield the right of way to ensure the emergency vehicle can respond quickly.