Motorists using a toll device are eligible to a toll discount. The toll ring was not juridically considered a road pricing scheme, since the income from the tolls goes to road infrastructure. To be considered a road pricing in accordance to Norwegian law, the scheme must be organised such as to charge most when the congestion is largest, i.e. in rush hour. Secondly, a road pricing scheme cannot primarily finance road investments, but must go either to public transport subsidies or to infrastructure for public transport and pedestrians and bicycles. The system was initially introduced to fund the building of new ring roads so that the heaviest traffic would not have to pass through the city centre. Part of the reason for this traffic is due to Trondheim Port being located on an artificial island only accessible via the city centre and Trondheim has yet to move its port out of the city centre, like the London Docklands and Fjordbyen in Oslo. There are ongoing discussions on whether the port should be moved from its current location. The lack of a bypass outside the residential areas, along with less than optimal railroad capacity, contributes heavily to road congestion through the municipality. Criticism The initial reaction to the toll system in Trondheim was mixed. Some daily commuters felt the extra cost was unjustifiable, but most drivers were quite happy to pay in order to get some of the heaviest traffic out of the city centre. Ten years on, most drivers in and around Trondheim do not give the toll system a second thought. They have become used to it over time, and the system was also cleverly designed to be extremely user-friendly . The initial development of the project came at the same time as the city council decided to close the Trondheim Tramway in 1988, with arguments that diesel buses are cheaper to operate. Trondheim has a notoriously low public transport ridership, at 11% of the total transport trips using public transport, compared to almost 50% in Oslo. Part of this is credited the low frequency and high time costs of using public transport in Trondheim, partially due to high investments in road infrastructure compared to public transport infrastructure. After the toll ring was closed in 2005 some politicians, environmental advocates and others have suggested reintroducing the toll ring. While some are wanting to use the funds to complete the