 They curve to the northeast and then to the east-northeast and have an interchange with US 129/US 441/SR 15 (Macon Highway) and the southern terminus of Timothy Road.In the western part of the interchange, Athens Perimeter Highway crosses over McNutt Creek into Clarke County and the city limits of Athens.US 29/US 78/US 129/US 441/SR 8/SR 10 Loop, plus the unsigned SR 422, that is the hidden reference route numbering for the Athens Perimeter Highway, form one of the concurrencies in the state with seven component highways.