The first published reference to 'road pricing' was possibly in 1949 when the RAND Corporation proposed "use of direct road pricing to make freight journeys more expensive on congested routes or to influence the time of day at which freight traffic operates" [REF].
In 1963 Vickery published a paper 'Pricing in urban and suburban transport' in the American Economic Review[REF] and Gabriel Joseph Roth, John Michael Thomson of the Department of Applied Economics at the University of Cambridge published a short paper titled "Road pricing, a cure for congestion?"[REF]