Highway speed limits will be reduced to 70km/h during busy morning and afternoon periods outside Westmere School by the end of this year.
Whanganui MP Chester Borrows said, however, that the New Zealand Transport Agency process of getting the reduced limits established outside rural schools was always a "protracted bureaucratic process".
"It's the gazetting process that takes so long, unfortunately, because it means everyone has to wait so long," he said.
But by the end of the year the speed limit outside Westmere would be marked by an electronic sign, he said.
"During school drop-off and pick-up times, the speed limit will likely drop from 100km/h to 70km/h," he said.