Avon Valley Residents Association chairman Keith Schekkerman said projected traffic movements showed waste would be transported in road trains via Midland, Glen Forrest, Mundaring and Sawyers Valley to Allawuna Farm.
�Road trains will travel at a rate of 12 an hour, six coming, six going, no doubt they will catch up with each other and form packs of road trains,� he said.
�With the road from the Lakes to York already having a high accident and death rate, the last thing we need is more road trains.
�The road is part of Wheatbelt roads that have the highest accident rate in the country according to the RAC.�
A State Administrative Tribunal last month overruled objections by the residents� association and the Shire of York to an updated landfill proposal by waste management giant Sita Australia.
Mr Schekkerman said the decision by SAT in practice meant the proposal was effectively a new application and had to be re-advertised by the Shire and by the Department of Environmental Regulation.
�The changes are minor and of a cosmetic nature; the substance of the proposals have stayed the same,� he said.
The changes mainly relate to the size of the landfill being reduced by half.
However, Mr Schekkerman said SITA would not commit to not expanding the landfill site at a later stage.
He said SITA had reduced the height of the landfill.
The height of the landfill in the original application was five metres above the tree line and the new plan reduced the height by five metres.
Association campaigners are handing out leaflets on the streets of York calling for residents to write against the rubbish proposal to the Shire of York by May 25, the last day for written submissions.
The DER is also advertising the amended proposal and submissions need to be in by June 1.
Mr Schekkerman said after the Shire had made a judgement on the proposal, the application would go to the Joint Development Appraisal Panel (JDAP), a five-person team with two representatives from the York community.
The $46 million landfill project has faced fierce opposition from York residents concerned about water and land contamination.
SITA state general manager Nial Stock said consultants had worked with a project team on geology and hydrology studies.
He said the redesign of the site would reduce the landfill footprint by 31 per cent and the volume of waste by 46 per cent.