Police are advising motorists in Auckland, Hamilton, Wellington, Christchurch and other major cities to get to work before 7.30am tomorrow or face delays of up to 90 minutes owing to the planned trunk blockade by diesel drivers.

Organisers of the blockade are protesting against the unexpectedly sudden diesel road-user charges which will come into effect tomorrow morning. 2000 trucks will make their way to city centres between 7.30am and 10am tomorrow morning aiming to congest traffic and converge on the CBDs’ streets.

Primary routes leading to city centres are expected to be gridlocked and take considerable time to clear up - particularly in Auckland where half of the 2000-odd trucks will stand their ground against the charges.