Transmission Gully will move to a 110km/h speed limit from next week.

"Since opening in 2022, Transmission Gully has recorded low crash rates, with no deaths despite more than 150 barrier strikes. Safety features, including two lanes in each direction and a flexible median barrier between opposing lanes help reduce the risk of death or serious injury in a crash," he said.

Bishop said during public consultation in 2025, 92 percent of the 2061 submissions supported raising the speed limit.

The 4.6km Raumati Straights section of State Highway 1 will remain at 100km/h, before the speed limit returns to 110km/h at the Kāpiti Expressway.

Bishop said while Raumati Straights was consulted on, technical assessments showed the section did not meet the minimum safety and design requirements for raising the speed limits.

I'm assuming the Raumati Straights are that really steep part with the brake failure ramp?