Pavements blocked by hedges

These hedges are being cultivated to grow over the pavement rather than in the residents' gardens. These reduce the width of the available to one foot in several places. This is after a fresh cut, so it will get worse over the next few weeks. It is not just one property but many. Please can you advise these residents to cut these hedges back, and start to grow them on their own proprty instead, so that we don't have to walk in the road or in the mud.