Waka Kotahi NZ Transport Agency is proposing lower speed limits on State Highway 57 between Levin and Shannon.
Director of regional relationships Linda Stewart said the proposed changes were an effort to prevent people being killed or seriously injured on the road.
"People travel this road on their way to work or school, to visit family and friends, to pick up their groceries or to see the doctor. Wherever it is, they should be able to get their destination and back home safely," she said.
"Safe speeds save lives. Whatever the cause of a crash, speed is the biggest factor that determines whether a person is killed, seriously injured, or walks away unharmed.
"We know from the feedback we've had from the community, the crash history on the road, and population growth in the area that the current speed limits on State Highway 57 are not safe and appropriate. That's why we are proposing new, safer speeds for the road."