COVID-19 SERVICES UPDATE: Information for all alert levels, Waka Kotahi services and more

SCAM ALERTS: Report a phishing scam or learn about the latest phishing emails

ONLINE SERVICES: We currently have an issue with receiving some payments and are working to resolve this issue as quickly as possible. We apologise for any inconvenience.

EASTER WEEKEND – PLAN AHEAD: Heading away for the long weekend? Check our holiday journeys tool(external link)

SCAM ALERTS: Refund email and Vehicle licence (rego) renewal phishing emails

Monitoring pavement performance

Since 2000, our Long Term Pavement Performance programme (LTPP) has been helping us to understand how our state highway surfaces perform. And we're building a picture of how pavements will perform in future through the use of the Deighton's Total Infrastructure Management System (DTIMS).

The LTPP

Covering 139 sites (71 on state highways, 68 on local roads), the LTPP survey data collection project provides detailed pavement performance information on roads with various characteristics. We collect this information – including on traffic, construction, climatic environment, age and condition – by accurately measuring carefully selected sections of road each year.

These survey results provide accurate, repeatable measures of rutting, roughness, texture and surface condition. We feed this data into the DTIMS deterioration models to improve their accuracy in predicting the future performance of the pavement. We also use the LTPP data to ensure the SCRIM+ vehicle provides reliable network-wide data of pavement condition, mainly on state highways.

SCRIM+

DTIMS

To enable us to better understand the way our roads will perform in the future, we use the DTIMS to predict how much surfacing is going to need renewing, how much pavement length needs strengthening we will need to do over the next 10 years and the funding implications, for our state highway plans.

Contact us

David Alabaster
Principal Pavements Engineer
NZ Transport Agency
PO Box 1479
Christchurch 8011

Ph: +64 3 964 2867
E: david.alabaster@nzta.govt.nz

Related links