§ Chris Grayling
To ask the Secretary of State for Transport, Local Government and the Regions (1) what assessment he has made of the potential impact of road tolls on(a) motorways and (b) trunk roads on the level of road usage on other roads; 
(2) what estimate he has made of the amounts that could be raised by the introduction of road tolls on motorways. 
§ Mr. Jamieson
I have been asked to reply.
Various assessments of the impact of road user charging have been made in the background analysis document of the 10-year plan for transport and "Modernising the Taxation of the Haulage Industry Progress Report One", published by HM Treasury, HM Customs and Excise and the Department of Transport, Local Government and the Regions.
A number of multi-modal studies have also examined the impact of applying road user charges within their study areas. These papers are the work of study consultants. The Government have made no estimates of the revenues that might be generated.