You know how when you and your mom drive on the road and you see those bright orange things that look like upside-down cones? Those are construction barrels!
Construction barrels are used to help keep people safe when they are working on the road. When people are fixing or building something on the road, they need to make sure that drivers don't go too close or too fast, because that would be dangerous.
So they set up the construction barrels to make a special area where people can't drive. These barrels are bright orange so that people can see them really well, even when it's dark outside.
Sometimes, there are big signs on the barrels with words on them like "Road Work Ahead" or "Slow Down". These signs tell the drivers to be careful and watch out for the people working on the road.
And that's what construction barrels do, they help keep people safe while they make the road better!