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FRANKFURT (Reuters) - Audi NSUG.DE is set to join an alliance with rivals Daimler DAIGn.DE and BMW BMWG.DE to develop advanced driving assistance systems, German weekly Wirtschaftswoche said on Thursday.

The companies are developing highly automated driving functions to enable so-called level 3 autonomous driving on highways as well as automated parking.

Audi, a unit of Volkswagen VOWG_p.DE will announce the alliance at the Frankfurt auto show in early September, Wirtschaftswoche said.

Volkswagen will continue to develop fully autonomous vehicles in cooperation with Ford F.N, Wirtschaftswoche said.