More than half the residents of a London borough that will be affected by the proposed expansion of the congestion charge zone said they are in favour of the idea.
A London Assembly commissioned survey of six boroughs shows 53% of the inhabitants of Kensington and Chelsea, in west London, would like to see the £5 road toll in their area.
But residents of Tower Hamlets were less keen, with only 33% in favour of seeing the scheme expanded into their east London borough.
Further out from central London support for extending the zone was much lower, with 64 per cent of respondents against any extension to the zone, and 32 per cent in favour.
But support increased slightly - to 36% - for a different system of mini-congestion zones around town centres such as Richmond in south London, with residents receiving discounts but outsiders paying to enter.
This idea attracted 41 per cent support in Richmond, followed by 38 per cent in Haringey in north London and Croydon in the south.
Some 1,200 residents, including drivers and non-drivers, were questioned across seven boroughs - Westminster, Kensington and Chelsea, Tower Hamlets, Haringey, Havering, Croydon and Richmond.
The results follow the mayor's plans to widen the scheme if he is re-elected next year.
Congestion charging started on 17 February and in the first three months resulted in a 20 per cent reduction in drivers entering the zone.
Lynne Featherstone, the Chair of the Transport Committee, said: "The mayor has done a good job so far in bringing along the public on road pricing but our survey shows that he still has much work to do."