We have a problem like that east of McAlester on Highway 270. There are many old coal mines all around McAlester and one of them is under 270 and it keeps caving in. They have pumped many yards of concrete down there to stabilize the roadway.
Time will tell if it works. They have repaired the same spot more than once and it did not seem to hold, so we may have a giant sinkhole here in Oklahoma.
LOL, what if I said driving into/over one of those sink holes is one of the things I'm paranoid about? Don't know why but it crosses my mind now and then.
The sink hole at 36th and Martin Luther King in OKC freaks me out and I drive by it every day. Wonder when they are going to get around to fixing it.