Question of top speed

The circuit of Reims-Gueux was a Grand Prix racing road course, located in Gueux,  west of the city Reims. The triangular layout of public roads formed a race track of 7.8 km (4.85 miles).

The circuit became known to be among the fastest of the era for its two long straights of about 2.2 km each, allowing maximum straight-line speed, resulting in many famous slipstream battles.

Picture above: Mike Parkes at the wheel of his Ferrari 312, during the 1966 French Grand Prix at Reims-Gueux, where he finished second behind the Brabham-Repco of Jack Brabham (at the centre of the picture below).