Potential train traffic to eventuate

A federal and state government report into the construction of a second Sydney airport suggests excessive traffic woes will befall future commuters.

The government inquiry deems that a second airport in Sydney is urgently required.

Trains servicing the airport will exceed capacity as early as next year, news.com.au reported.

Important motorways and roads will also be heavily affected, resulting in massive traffic jams on the M5 and CBD access roads.

The lack of a second airport in Sydney will cost the Australian economy $59.5 billion, as well as forgoing $34 billion worth of GDP.

The report, commissioned by Transport Minister Anthony Albanese, also calls for a provision to elevate the current flight cap of 80 take-offs per hour to 85.