Former prime minister Liz Truss has fired a warning shot at council leaders over the suggestion Low Traffic Neighbourhoods could be created in Norfolk.
Norfolk County Council revealed last week it is exploring the possibility of introducing the measures, which restrict the movement of vehicles through residential areas.
The schemes are designed to reduce traffic and cut rat-running by blocking certain streets with planters or bollards, or using surveillance cameras.
But they have sparked controversy, with opponents in other parts of the country setting fire to street furniture.
And Ms Truss, Conservative MP for South West Norfolk, has made it clear to County Hall leaders that she would try to block any proposals in her constituency.
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She said: "I would be completely opposed to the imposition of Low Traffic Neighbourhoods on South West Norfolk.
"There is no evidence to suggest there is public support for such a move. And these LTNs cause huge inconvenience to many people.
"In particular they can make it more difficult for the emergency services to operate."
Supporters of the schemes argue they are good for the environment and create more pleasant communities, by reducing car ownership and getting people to switch to cycling and walking.
County Hall has not said where LTNs could be imposed in Norfolk, but Graham Plant, cabinet member for highways, infrastructure and transport, confirmed at a recent council meeting that the authority was investigating the option.
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He pledged the council would work with local communities to reduce the impact of unnecessary traffic in neighbourhoods and support active travel.
LTNs are distinct from 20-minute neighbourhoods, another planning concept for creating communities where people should be able to walk to and from basic amenities like shops and parks in 15 or 20 minutes.
The council had previously agreed to look into how such neighbourhoods could be created, which prompted controversy, particularly in Thetford.
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