Reversals on blanket speed limit reductions will begin on Wednesday night, starting with State Highway 2 in the Wairarapa, and will be complete by 1 July.

The National and Act coalition agreement committed to reversing the reductions implemented under the previous Labour government.

In total 38 sections of the state highway network will be reversed back to their previous higher speed limits by NZTA over the next five months.

The state highway speed limit changes will take effect across the country in Northland, Auckland, Waikato, Bay of Plenty, Gisborne, Hawke's Bay, Manawatu-Whanganui, Greater Wellington, Canterbury, and the top of the South Island.