Bleeding Tar

No, not the name of a pub, nor a wounded old salty sea dog. Bleeding tar happens in the hottest of weather, and even the mention of the word causes panic. The road becomes a liquid sticky mess, trucks pick this up and plough permanent furrows. Potholes breed and multiply before your eyes. The end result is known as "scabbing".
There are frantic r/t calls for a truck to spread a fine chip or sand, before the road begins to look like a scale model of the Somme battlefield. Drivers panic as a monumental Sunday carwash looms. (Kerosine is the best tar remover)
It is usually so hot it is hard to even think. You really, really, want a cold beer, or ten. The frosts and ice of winter are a lightyear away.
If you encounter bleeding tar, treat it as ice, and don't stop. If you do, you may be glued to the road, or ... you will take a goodly piece of the State Highway with you as a souvenir of your trip. We just get the hole.