Auckland Transport (AT) is responsible for
After a road is sealed it can take a few weeks for the seal to fully set. During this time the seal can be damaged by large vehicles, heavy rain, heat or vehicles that brake suddenly,
Auckland has 7,300 kilometres of legal road, of which approximately 868km (12%) is unsealed. 678km (78%) of the unsealed road network is in Rodney and the remaining 190km is located mainly in Franklin, Hauraki Islands, and Waitakere*.
Typically, 50,000 vehicles a day use Auckland’s unsealed road network.
How we prioritise road sealing
AT prioritises sealing unsealed roads using the criteria contained in the Seal Extension Guidelines, which have been reviewed by rural Local Boards.
The prioritisation produces a ranking of all the unsealed roads compared to the available budget in Auckland Council’s Long-term Plan (LTP). The LTP for the period 2015 to 2018 allocated $10m in total for sealing. This is sufficient to seal a total length of 12.56km or 1.5% of the total unsealed road length (sealing all unsealed roads has been estimated to cost more than $350 million).
AT has produced a priority list of all of the unsealed roads in Auckland. The rural Local Boards have reviewed this list.
Current and future sealing work
The sealing of Matakana Valley Road and the first section of Silver Hill Road have been completed. Takatu Road is under construction with completion in June 2017, and construction work is programmed to start on Monowai Road late 2017.
The Council LTP for the period 2018 to 2021 has yet to be finalised. Accordingly, the level of funding to be made available for sealing is currently unknown. However, it is probable that the following roads will be sealed during the period 2018 to 2021:
- Wellsford Valley Road.
- Ahuroa Road.
* The Waitakere Ranges Heritage Area Transport Design Guidelines will be taken into account when considering the sealing of any unsealed roads in this area. These state that: “existing unsealed roads should remain in an unsealed
Images: Matakana Valley Road before and after road sealing.
Cost of sealing
There is no typical or standard cost per kilometre to seal an unsealed road. Sealing changes a road’s physical characteristics, a driver’s expectations and encourages higher speeds.
To mitigate these changes, it is often necessary to widen the road, undertake geometric and safety improvements including increasing the radius of bends and corners, the provision of road markings and road
The annual cost of maintenance and renewals for a sealed road is
A trial of dust suppressants is being currently being carried out in Kaipara. The trial is evaluating 5 different pavement compositions to determine the best approach to introducing dust-suppressant solutions in the Auckland region.