Traffic continued to rise to the point where major congestion was experienced on the central section. Work began on 16 February 2004 on the A500 Pathfinder Project to replace the final two roundabouts in Stoke with underpasses. The Highways Agency defined the pathfinder project as involving "a new form of contract and co-operative working methods to deliver a better value project, faster." The project involved alterations to the path of the Trent and Mersey Canal and River Trent, along with new provisions for pedestrians. The work was carried out by Edmund Nuttall Limited and was planned to be completed in spring 2006. Following a number of delays for which it was rumoured the construction company was being fined up to £100,000 a day for not keeping to schedule, the road opened on Tuesday 26 September 2006, with the southbound traffic in the morning and northbound traffic in the afternoon. Several months of additional work was needed to finalise traffic light operations, gardens, and other miscellaneous tasks.