1 SUR­FACE

Evo India - - RALLYCROSS MASTERCLAS­S -

A World Rallycross cir­cuit’s sur­face must be at least 35 per cent, and up to 60 per cent, ‘sealed’ – in other words as­phalt, con­crete or sim­i­lar. The re­main­der is un­sealed, usu­ally dirt or gravel. Sil­ver­stone has opted for just 39 per cent sealed, which puts it among the more dirt-heavy rounds. Work be­gan on the track in mid-2017, so the sur­face has had some time to weather in – a process that can be ar­ti­fi­cially en­abled, but there’s no sub­sti­tute for the real thing.

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