I have found some links to documents that residents might find helpful as they contain the guidelines that are used in planning street layouts. What has impressed me is how communities in Warwick are not just complaining to the council, they have been out measuring the roads and trying to come up with solutions that suit their own areas.
These documents may help anyone with similar problems to understand the guidelines that the council may be using and that way they are armed with the information and will not be blinded by science.
The link below is the Manual for Streets a joint publication produced by the 'Department for Transport' and 'Communities and Local Government'. Chapter 7 and 8 are the most interesting dealing with street geometry.
The following link is for a document from the institute of civil engineers and contains much the same information as the above only without pictures.