Campaigners are staging a protest against the government's decision to scrap plans for a bypass - by continually using pedestrian crossings.
The Mottram bypass in Greater Manchester had been given the go-ahead after being put on hold for four years.
However, the Department for Transport announced it would not go ahead in its Transport Review last month.
Campaigners are pressing the buttons on four crossings along the A628 during Monday morning's rush hour.
Brian Butler, vice chair of Longdendale Seige Committee, said: "There are four pelican crossings along this route from Mottram to Tintwistle.
"Members of our group are going to be manning these continually, pressing the buttons and causing delays.
"We want to raise awareness of the terrible traffic problems and the way our lives are blighted.
"We need this bypass. It is terrible it was put on hold for four years and we want to keep the momentum of this protest campaign going."