A new mini-tunnel for the A13 would free up land for future development the mayor said
The mayor of London has announced plans to redesign some of London's busiest roads by having stretches of them go through tunnels.
Boris Johnson said work could begin at five locations which would allow the land the road was on, to be developed.
The roads are the A4 in Hammersmith, the A13 in Barking Riverside, the A3 in Tolworth, the A316 at Chalkers Corner and the A406 in New Southgate.
But the mayor said tolls could be used to help pay for the work.
He made the announcement during his trip to the US.
