The truth is we don't know what Walmarts plans for our roads are !
Why would a planning applicant have any 'plans for our roads'? They only put such things in their drawings if the planning authority suggests them. For example, it will have been planning officers at SMBC, no doubt in consultation with colleagues at Highways, who suggested the new mini-roundabout at Hibbert Lane/Edwards Way. If anyone is curious about any other possible changes to roads, the place to ask would be at SMBC - ASDA and camsfc will just do whatever the council suggests.
Dave
Thats only true to a point. ASDA will assess the local network and then produce a report which will then set out either a) The junctions are all fine and no off-site work needs to be done, or b) those locations where problems are predicted and where work is required. They will then propose what work is necessary. This will all be set out in a formal report known as a Transport Assessment - a report required to be submitted to allow the planning applciation to be validated.
SMBC will then review this TA and either a) agree with the findings, or b) disagree and either ask for more work to be done to convince them or request those additional measures that they think necessary.
Its possible that some pre-app discussions may have taken place and SMBC then given some indication as to likely solutions for the area, but almost certainly SMBC will have done no work of their own to support such suggestions, which would simply be based on local officer experience of the local ares.
In any respect SMBC cannot simply demand improvements funded by a developer that capacity or safety assessment work does not demonstrate as being necessary. So they can't simply tell ASDA what they want and then necessarily expect to get it.