Frequently Asked Questions
While we’re out in your community we’re often asked questions and there are some that are commonly raised, so we thought we’d share these with you.
Q: Why don’t you put in a left turn slip lane at the new Coatesville Riverhead Highway roundabout, for those coming from Coatesville and Riverhead?
A: A dedicated left turn slip lane on the Coatesville Riverhead Highway approach to the roundabout was looked in to during the early stages of the project. In order to incorporate a slip lane, the proposed roundabout footprint would have to be made larger to allow for vehicles to safely merge and provide adequate sight distance. An extensive amount of property would also be needed. In addition, slip lanes encourage higher speeds which in turn would make it unsafe for pedestrians who are wanting to cross at the roundabout.
Q: How will a roundabout help Coatesville Riverhead people get out in the morning peak, when they will be needing to give way to the constant stream of traffic coming from Kumeu?
A: Our traffic team have undertaken modelling of the proposed roundabout to understand its performance. The modelling is the best way to predict how the roundabout will function after it is built. The findings showed that vehicle delays and queues, on all legs of the roundabout, will be not be signficant. This is because the approaches to the roundabout will be designed so drivers have to slow down, which in turn creates gaps in the flow of traffic, allowing other vehicles opportunities to enter the roundabout from adjacent roads. At the moment, there is no incentive for traffic coming from Kumeu to slow down or create safe gaps for those turning from side roads.
More FAQ's can be found here.