Auckland Transport is reducing speeds all over Auckland and Piha is included. AT proposes that speeds on all roads at Piha are reduced from 50 kph to 30 kph. This was start from near the current 50kph sign not far past the Karekare turn-off.
If you want to make a submission you have until 28/8 and use the link below
https://haveyoursay.at.govt.nz/kko
This map shows the proposed changes