A trial of 1,400 drivers across Melbourne suggests time-of-use charges can be effective in easing traffic congestion. AMPG/Shutterstock November 22, 2017 City‑wide trial shows how road use charges can reduce traffic jams Leslie A. Martin, The University of Melbourne and Sam Thornton, The University of Melbourne A city-wide experiment suggests well-designed road use charges could ease congestion by encouraging people to drive at different times, take other routes or use other transport.