Adolphe Kégresse was a French military engineer who invented the half-track and dual clutch transmission.
Adolphe Kégresse seated behind the wheel of the Imperial "Benz". At the main entrance of Catherine Palace, Tsarskoye Selo, Russia, September 9, 1911.
Tsar Nicholas II Car Garages, Pushkin, Saint Petersburg where Kégresse was Head of the Mechanical Department
bas-relief image of a car race, Tsar Nicholas II Car Garages, Pushkin, Saint Petersburg
Former Tsar Nicholas II Car Garages, Pushkin, Saint Petersburg in July 2017
A half-track is a civilian or military vehicle with regular wheels at the front for steering and continuous tracks at the back to propel the vehicle and carry most of the load. The purpose of this combination is to produce a vehicle with the cross-country capabilities of a tank and the handling of a wheeled vehicle.
Citroën P17 half-track truck of the early 1930s
A car from Tsar Nicholas II of Russia's personal car pool converted with Kégresse tracks
Vladimir Lenin's Rolls-Royce Silver Ghost with Kégresse track, converted by the Putilov Plant), at Gorki Leninskiye
A restored Lombard steam log hauler in New Hampshire, US, in 2008