Chatham is a track that was on an ISI game called SportsCar GT that came out in 1999. One of my favorite tracks on that game. A very fun, fast track.
I made the track from memory so it is not perfect but it is close. Then I made some jumps (to keep it Duke Boys style) on the back straight. But if you are good you can weave through them without having to jump at all.
On the original track the back straight was the front straight but it seemed the best place to put the jumps and I didn't want the jumps at the start line on this one. So I moved the start/finish line to the other side.
I do not have a 3d modeler so I could only put some basic grandstands and garages in do to the limitations of Bob's track builder but, non-the-less it is a fun track.
Hope you enjoy the track. There are more Duke Boys tracks available on http://dukeboysracing.spruz.com I have posted most of them here but for some reason a couple I submitted haven't showed up here on RFC.