A winter service vehicle is a big truck or machine that helps to clear away snow and ice from roads and sidewalks during the winter. It's kind of like a superhero that comes to save the day when everything is covered in snow and it's hard to walk or drive safely.
The winter service vehicle usually has a big plow on the front that can push snow out of the way. It also has a spreader on the back that can spray salt or other treatments to melt ice and make the road less slippery. Sometimes, the vehicle will have special brushes or blowers to clear snow from sidewalks or other hard-to-reach areas.
When the weather gets really bad, the winter service vehicle will go out and work all night long to make sure the roads and sidewalks are safe for people to walk and drive on. It's important to keep everything clear and safe, especially if you need to go to school or work or if there's an emergency. So, the winter service vehicle is a very important machine during the winter months!