To improve the mobility of the imperial car park, he invented the Kégresse track to modify normal motor vehicles into half-tracks.

He was also a personal chauffeur of Tsar Nicholas II and the Head of the Mechanical Department of the Russian Imperial Garage at Tsarskoye Selo.

"[1] In 1908, the architect Lipsky VA designed a second two-storeyed Art Nouveau building for the Russian Imperial garage at Tsaskoye Selo / Pushkin, Saint Petersburg it had a total area of 367.6 sq.

The building is noteworthy and identifiable for inclusion of a grand staircase with an external bas-relief image of one of the first car races held regularly in Tsarskoe Selo before the First World War.

[2] After World War I Kégresse was forced to return to his home country, where he was from 1919 employed by the Citroën company during the 1920s and 1930s to design half-track vehicles, together with engineer Jacques Hinstin.