Since 2000, we’ve been running the Long Term Pavement Performance (LTPP) programme to understand how our state highway surfaces hold up over time. This helps us predict how roads will perform in the future using a tool called Deighton’s Total Infrastructure Management System (DTIMS).
The LTPP programme covers 139 sites (71 on state highways and 68 on local roads). Each year, we collect detailed information about traffic, construction, climate, age, and condition by measuring selected sections of road. This data shows things like rutting, roughness, texture, and surface condition.
We use this information to improve DTIMS models so they can predict future pavement performance more accurately. It also helps us make sure the SCRIM+ (Sideway-force Coefficient Routine Investigation Machine) vehicle provides reliable data across the network.
DTIMS helps us forecast what maintenance will be needed over the next 10 years, such as how much surfacing will need renewing, how much pavement will need strengthening, and what funding will be required for state highway plans.
