The official report from the DfT site shows a map of roads and congestion hotspots - it zooms as follows:



Red - severly overloaded
Orange - overloaded or nearly so
Blue - not overloaded

Would you like to see that with some place names and the TransWilts on it?



Red - severly overloaded
Orange - overloaded or nearly so
Blue - not overloaded
Black - the "Transwilts" passenger railway line, just 2 trains a day in parts

Network Rail say DfT growth forecasts are too low (link below.)
http://www.rmtbristol.org.uk/2007/11/we_cant_cope_with_this_many_pa.html

Network Rail plan prefab stations to drive down unit costs (link below.)
http://www.rmtbristol.org.uk/2007/11/uk_railways_boss_plans_prefabr.html#more