B-Double Driver's Guide to Approved Roads in Every Australian State

If you're running a B-Double and relying on Google Maps to find your route, you're already in trouble. Consumer navigation apps have no concept of B-Double approved roads. They will happily send you down a road that will get you a $6,000+ fine, a forced turnaround, or worse. This guide is a practical reference for where B-Doubles can legally operate in every Australian state, what the NHVR network map actually means, and how to check before you turn the key.

What the NHVR B-Double Network Actually Is

The National Heavy Vehicle Regulator (NHVR) maintains the National Network Map, the authoritative source for which roads are approved for heavy vehicle combinations including B-Doubles, road trains, and PBS vehicles.

Every road segment on that map carries one of three access codes:

Green, Approved. Your combination can use this road under standard conditions.
Amber, Conditional. Access is permitted but subject to restrictions (weight limits, time windows, escort requirements, bridge clearance conditions).
Red, Restricted. Off-network. You need a permit or gazette notice to go here.

B-Double networks are defined separately from Road Train and PBS networks. Just because a road is approved for a rigid truck or prime mover does not mean it is approved for your B-Double configuration. Vehicle combination type matters, the network approval is specific.

State-by-State Approved Corridors

QLD, Queensland

Queensland's B-Double network covers most of the major highway corridors connecting the south-east with regional centres and ports.

Bruce Highway (Brisbane to Cairns), approved B-Double corridor, the backbone of QLD freight
Warrego Highway (Brisbane to Charleville), approved for B-Doubles through to Toowoomba and beyond
Pacific Motorway (Brisbane to NSW border), approved, high-volume route
Gore Highway (Toowoomba to NSW border via Goondiwindi), approved B-Double corridor
Inland routes west of Longreach and through the Channel Country, many are conditional or restricted, particularly in wet season. Check each segment.

For QLD specifics, use the NHVR network map filtered to your vehicle class at nhvr.gov.au.

NSW, New South Wales

NSW has one of the most extensive approved B-Double networks in the country given the volume of freight moving through the state.

Hume Highway (Sydney to Victorian border), approved B-Double corridor, fully covered
Pacific Highway / Pacific Motorway (Sydney to QLD border), approved, with some transitional segments worth checking after recent upgrades
New England Highway (Newcastle to QLD border), approved B-Double corridor through Tamworth and Armidale
Newell Highway (Victoria to QLD via Dubbo, Narrabri), approved for most of its length, some conditional sections
Western and regional roads, many are conditional. Don't assume approval outside the main corridors.

VIC, Victoria

Victoria's network is approved on the major freight corridors but Melbourne's urban area has significant restrictions you need to know.

Western Ring Road, approved B-Double corridor connecting freight routes around Melbourne's north-west
Princes Highway (Melbourne to SA and to NSW), approved on the main corridor; check regional spur routes
Western Highway / Calder Highway (Melbourne to SA border and to Bendigo), approved B-Double network
Hume Freeway (Melbourne to NSW border), approved, one of VIC's busiest B-Double routes
Melbourne CBD and inner suburbs, largely restricted for B-Doubles. Do not assume city street access. Use designated freight routes.

WA, Western Australia

WA's geography means long hauls on well-defined corridors. The main highways are approved; remote roads vary significantly.

Great Eastern Highway (Perth to Kalgoorlie), approved B-Double corridor, key mining and freight route
Brand Highway (Perth north to Geraldton), approved B-Double corridor for coastal freight
North West Coastal Highway (Geraldton to Port Hedland), approved, critical for north-west resource operations
Great Northern Highway (Perth to Broome via Newman), approved on major sections; check remote stretches
Remote and pastoral roads, check individually. Conditions can apply due to road surface, bridge ratings, and seasonal access.

SA, South Australia

South Australia's main roads are generally well-approved for B-Doubles, with the network concentrated on primary freight routes.

Stuart Highway (Port Augusta north), approved, connects to NT network
Princes Highway and Augusta Highway, approved on primary freight corridors
Lincoln Highway and Eyre Highway, approved B-Double routes for freight to the Eyre Peninsula and into WA
Rural and secondary roads, conditional in many areas, particularly in the south-east and on unsealed routes. Always verify per-segment.

NT, Northern Territory

The NT is where road train country begins, but B-Double access is generally approved on the main highways.

Stuart Highway (Darwin to SA border), approved for B-Doubles and road trains, the NT's primary freight spine
Victoria Highway (Katherine to WA border), approved B-Double and road train corridor
Remote tracks and station roads, outside the gazetted network. Permit required. Do not assume access.

What Happens If You Go Off-Network

Going off-network without a permit is not a paperwork technicality. It is a heavy vehicle offence under the Heavy Vehicle National Law (HVNL).

Infringement-level penalties: $500 to $6,000+ depending on the offence and jurisdiction
Court penalties: Up to 10% of the maximum fine available under the HVNL
NHVR enforcement action: October 2024 saw NHVR propose 50 penalty increases across compliance categories, enforcement is tightening, not loosening
Operational impact: If enforcement intercepts you off-network, you may face a directed turnaround with no guarantee of a legal route back, your load and schedule are at risk

Permit or gazette notice is the legal pathway for conditional or restricted roads. Apply through NHVR's permit portal before you move, not after you're stopped.

How to Check Before You Drive

Option 1, NHVR Network Map The NHVR provides an interactive map at nhvr.gov.au. Select your vehicle class, enter your combination, and view the green/amber/red access codes for your route. This is the primary legal source.

Option 2, Truck Me Truck Me overlays live NHVR network data directly on the map in real time, colour-coded by access status for your selected vehicle type. You see green, amber, and red road segments as you plan your route, the same data the NHVR map provides, built into a navigation-style interface. Route planner mode calculates a path that keeps you on approved roads for your B-Double configuration. No scrolling through PDFs or cross-referencing permit lists.

Consumer apps, Google Maps, Waze, Apple Maps, have no knowledge of the NHVR B-Double network. They route for passenger vehicles. Using them for B-Double route planning is a compliance risk on every trip.

Plan Legal. Drive Legal.

B-Double approved roads change. Networks get updated, conditions get added, and penalties get heavier. The safest habit is to verify your route against current NHVR network data every time you plan a new run.

Check the NHVR network map for official approval status. Or open Truck Me, it shows you exactly where your B-Double can go before you leave the yard.