"Dijon-Prenois is a 3.801 km (2.361 miles) motor racing circuit located in Prenois, near Dijon, France. The undulating track is noted for its fast, sweeping bends. Built in 1972, Dijon-Prenois hosted the Formula One French Grand Prix five times, and the Swiss Grand Prix once in 1982. The first F1 race was run in 1974 on the circuit's original 3.289 km (2 mile) layout; with lap times under the 1 minute mark, there was an extreme problem with congested traffic between the race leaders and the backmarkers. Therefore, in 1975 an extension was added to lengthen the circuit as well as to reprofile many of its corners before the time F1 could return to Dijon in 1977. Formula One has not returned to Dijon since 1984 "