The New Zealand Transport Agency (NZTA) has acknowledged that a lengthy strip of seal on SH2 needs to be replaced.
This comes after a Featherston resident, Reiner Schoenbrunn, complained to the Times-Age that his windscreen was fractured in March and again this month.
The area in question is around two kilometres on the "straights" between Tauherenikau and Greytown, an area that was chip sealed last summer, according to Mr Schoenbrunn.
Mr Schoenbrunn said the temporary speed limit was lifted shortly after the work was completed but much of the excess chips were never brushed off and accumulated in the middle and on both verges, posing a hazard to motorists.
Now, six to eight months later, the same stretch of road showed many bald patches and areas of deterioration where the tar had failed to fully bond the chips, he said.