Satellite navigation is blamed for heavy lorries being redirected through an historic wool town in Suffolk and causing damage to buildings.
Satellite navigation is redirecting traffic through historic Lavenham
Some navigation systems used by lorry drivers from overseas designate the A1141 road through historic Lavenham as an acceptable route across East Anglia.
However, the road runs along Water Street in the Suffolk wool town, a road originally designed for two carts.
Conservationists are trying to get the navigation systems changed.
Suffolk Preservation Society wants the databases to show the sensitivity of the route.
Worried about speed
Richard Ward, from the society, said: "It is a major worry because the drivers see this as the quickest route and go through the town at significant speeds.
"They also get very close to the historic buildings some of which have overhanging jetties.
"Drivers just tap their destination on an east-west journey into a satellite navigation system and it gives them an acceptable route through the centre of Lavenham.
"The narrow streets get congested and the heavy lorries damage the buildings.
"We now need to get these databases changed," he added.