"The preliminary work on the future transport needs of the ciity was originally undertaken in 1990s and a Supertram scheme was identified as the most effective and efficient way of creating extra capacity in the local transport network, " said the chamber's director of policy Ian Williams.

BBC: NEWS | UK | England | West Yorkshire | More delay on Supertram decision

The scheme to expand the road between Tonbridge and Pembury from single lanes to a dual carriageway was given preliminary approval earlier this year.

BBC: Kent A21 widening scheme public inquiry announced