View the Tasmanian 26m B-double Network
This Class 2 network shows roads mapped in three categories: Approved (green), Conditionally Approved (orange) and Restricted (red). Click on a route or bridge to show any conditions that apply.
This network shows access for Class 2 B-Doubles which do not exceed 26m overall length and comply with the National Class 2 B-double Authorisation Notice 2024.
This network also shows roads which can be accessed by B-doubles operating under several other Class 2 / 3 Notices or Schemes (see Relevant Notices and Schemes below).
Maximum vehicle dimension for this network are up to 26m overall length and 4.3m overall height1.
Restricted structures (red dots) must not be crossed.
Roads not shown as approved (green) or conditionally approved (orange) require road manager approval for access by permit. Application for access by permit is to be made through the NHVR. It is permitted to travel off route if the road is marked with detour signage or if directed by an authorised officer.
Operators must check for road closures and road conditions prior to travel to ensure clear passage. For roads managed by Building Tasmania, this information is available by selecting “Road Works - State Roads" via the "Map Layers" icon on this map.
General roadwork information is available at the Transport website.
Higher Mass Limits (HML) Roads
Roads which are part of the Tasmanian Declared HML Route Network can be superimposed on the map by selecting “HML Advisory layer” via the “Map Layers” icon.
Over the HML network, Class 2 B-double heavy vehicle combinations which comply with the Tasmania Higher Mass Limits Declaration 2021 can operate with axle group masses up to 17.0t for a tandem axle group, and up to 22.5t for a tri-axle group.
A class 2 B-double at HML which exceeds 21.0m in length2 cannot operate over the Tasmanian Declared HML Route Network unless the road is also part of the Tasmanian 26 metre B-double Network or the Tasmanian 23 metre B-double Network (if not exceeding 23m length), or access has been granted by permit.
Relevant Notices and Schemes:
- National Class 2 Heavy Vehicle B-double Authorisation Notice 2026 and operator guide
- Tasmania Class 3 Heavy Vehicles Transporting High-Cube Freight Containers Dimension Exemption Notice 2023
- Tasmania and Victoria Class 3 Heavy Vehicle Baled Hay Dimension Exemption Notice 2025
- National Class 2 Heavy Vehicle 4.6m High and/or 25m Long Vehicle Carrier Authorisation Notice 2025
- National Class 3 Heavy Vehicle - Vehicle Carrier Exemption Notice 2025
- National Class 2 4.6m High Livestock Carrier Authorisation Notice 2026
- Tasmania Class 3 Livestock Transportation Exemption Notice 2024 and Livestock Loading Scheme Info Bulletin (Tasmania)
1up to 4.6m, if operating under one of the Relevant Notices or Schemes allowing heights up to 4.6m.
221.3m, if the trailer is fitted with a rear load-restraining guard that complies with the Forestry Safety Code.