By Pam Graham of NZPA Wellington, June 29 NZPA - Fonterra and movers of aggregate, fuel and logs are among the companies expected to chase productivity gains -- estimated to be up to 20 percent -- from using heavier trucks.

Wellington, June 29 NZPA - A proposal to increase the length of trucks carrying empty containers by 2 metres could make a big difference to the movement of containers around New Zealand.