Eltham MP Clive Efford has claimed the transport network in south east London is "teetering on the edge of collapse".
Mr Efford said there was an urgent need for increased capacity on the road network and on public transport, in a debate in Westminster Hall on 24 February 2010.
He said incidents in the Blackwall Tunnel, which goes under the Thames, often led to gridlock in south-east London.
The Labour MP called for a third crossing alongside the existing Blackwall tunnels, and said the Docklands Light Railway should be extended to North Greenwich and possibly Eltham.
Transport Minister Paul Clark said transport in London was primarily the responsibility of the mayor.
He said his department had announced a further £6m in funding for Transport for London to help tackle congestion.