First. I dont know anything about this subject.
However, last weekend and maybe Mon and Tues there was great activity. Now all the shale/hardcore is covered with many layers of very nice tarmac, and very nice and tidy it looks too.
But, there is a considerable amount of concrete to go into the site. Have a look yourself. You can tell where it is going by the iron rods sticking upwards. So HGV bringing the concrete plus pumping equipment to lift it up, plus this and that.
I appreciate that the tar goes fairly hard after maybe 36 hours. But would'nt it have been more sensible to keep the tarmac to the very end?
I think so. You wouldnt get me tarring my drive {if I had one} knowing that maybe 20 or 30 lorries are about to arrive Mike