an all-day scheme was initially projected to raise around £900 million for a central cordon only and £1.5 billion for the dual cordon option. subject to public approval, the charge would have started in 2006, following various transport improvements. a two cordon scheme was expected to reduce congestion by up to 15% overall, with a drop of up to 85,000 journeys per day. it was projected to reduce volumes by 18 per cent in the centre and 15 per cent in the west. a one cordon scheme was projected to remove 59,000 journeys in the city centre, although there would be a small increase in the west. the cost for setting up the congestion charge was estimated at £11million for the two cordon option and £8million for the city centre cordon only proposal.