Mr Bridges said such a system could be modelled on Singapore, which plans to replace its road tolling gantries with a GPS system before 2020. Transport Minister Simon Bridges said this could be done by GPS satellite, as opposed to toll gantries or cameras. However, a GPS system could also create new privacy concerns. Introduced 2007 following public referendum, and cut congestion by 20 per cent• Singapore - congestion charge which changes according to traffic flows and varies depending on vehicle size. ROAD PRICING• London - one-off congestion charge of 11.50 pounds/day (NZ$23.70) for travel within designated zone.

Source: New Zealand Herald June 22, 2016 07:41 UTC