Fly Navy said:What Brett said. There are low-level routes all over the country. Not unusual at all, especially where you were.
There is equal likelihood that Tomcat was simply following the road and could care less about who was on it if they even saw you....we were playing tail chase over Turkey back in 80s in the mountains and we used roads to help navigate and came up over a pass inverted looking up at an eighteen wheeler crested the ridge as we had just rolled inverted to pull over ridge using positive G. He certainly got an eyefull of 2 Tomcats. We also raged later over Oman and Saudi Arabia and when we flew with TARPS, we'd find vehicles we never saw...flying that low takes concentration to avoid CFIT so buzzing vehicles aren't always the objective...I'm personally against it as a complaint can end up with unwanted carpet time.