I think they typically like min of 40. But also the entire week has to be consistent in the 40’s and rising because it’s cost a lot for the actual asphalt plant to be running so they don’t just open and close on a daily basis. They need to have orders. And on that subject concrete is also tough to place in cold temps slowing down a lot of construction but concrete actually produces it’s own heat during curing and blankets can keep that work going thru winter but asphalt is what a majority of our roads are made of here in PA.

No but traffic will be a mess with construction every spring summer fall in Pennsylvania forever. Asphalt plants need to run at a certain ambient temp for placement so the construction season is limited and they just try to get as much done as possible in the shortest amount of time and usually that means high lane closures and delays.

Well if all 10 of them were in the hole how the hell would they have any room to work? Also remember you are not in traffic, you ARE the traffic.