Calls to lower speed limit to save petrol

Lowering speed limits will save petrol during a time of global fuel insecurity and lives too according to the Global Road Safety Partnership. It is calling on the government to immediately reduce speed limits from100 kilometres an hour to 80 on rural highways. It says that alone would deliver meaningful reductions in fuel use across the country. Former science adviser to the Ministry of Transport and University of Canterbury Professor, Simon Kingham spoke to Lisa Owen.