Understanding the NHVR Network Map
The NHVR network map is the authoritative source for approved heavy vehicle roads in Australia. Truck Me puts it inside your navigation app, colour-coded and vehicle-specific, so you can see your legal network before you leave the depot.
What the NHVR network map is
The National Heavy Vehicle Regulator maintains a dataset of every road segment in Australia that has been classified for heavy vehicle access. Road managers, local councils, and state governments submit access decisions to the NHVR, which publishes them through its API. This dataset is the legal basis for which roads your truck can use.
The NHVR publishes this data through a web portal, but that portal is designed for planners and regulators, not for a truck driver navigating a route at 5am. It requires desktop access, GIS knowledge, and does not integrate with navigation.
Truck Me connects directly to the NHVR API and renders that same data as a colour-coded overlay on a turn-by-turn map. The same data, usable on the road.
The three access codes
Every road segment in the NHVR network carries one of three access codes for each vehicle class. Truck Me maps these directly to colours on the road overlay.
Approved
Your vehicle class is approved to use this road with no additional conditions. No permit required, no time restriction, no special authorisation. Go.
Conditional
Access is permitted but conditions apply. Conditions can include gross weight limits, daylight-only travel, weather restrictions, required permits, or mandatory escort vehicles. Tap the segment to see what applies.
Restricted
Your vehicle class is not approved for this road. Using a restricted road without a specific permit is a breach of the Heavy Vehicle National Law. Truck Me will not route you onto restricted segments.
Why the raw NHVR map does not work for drivers
The NHVR's own portal is a GIS-based web application. It requires a desktop browser, is not designed for mobile, and does not give you directions. It shows the network, but getting from that static map to a compliant route is entirely on the driver.
There is also a vehicle specificity problem. The NHVR portal shows network access but requires you to know which network to look at. Selecting the wrong vehicle class gives you the wrong picture. A road green on the B-Double network may be red on the Road Train network.
Truck Me removes both problems. Select your vehicle profile once, and the correct network overlay appears automatically on a navigation-grade map. The route calculator then uses that network to generate a turn-by-turn route that stays on approved roads.
A road approved for a semi-trailer is not automatically approved for a B-Double. Approval is per vehicle class. Always check the overlay for the specific vehicle you are driving.
How Truck Me uses the NHVR map
The network map is not a static reference layer in Truck Me. It is the foundation of every route calculation.
Live network data
Road access data synced directly from the NHVR API. No scraped databases, no guesswork.
Green, amber, red colouring
Every road segment on the map carries a colour that tells you its access status at a glance.
Vehicle-type specific overlay
Switch your vehicle profile and the map updates. B-Double approval is different from Road Train approval.
Segment tap for conditions
Tap any road segment to see its access code, active conditions, weight limits, and time restrictions.
Common questions
Is the NHVR map free?
The underlying NHVR data is a government dataset and is publicly available. However the NHVR portal is a desktop GIS tool, not a mobile app. Truck Me takes that data and delivers it inside turn-by-turn navigation at no extra cost.
How often is the NHVR network map updated?
The NHVR updates its network data regularly as road managers submit changes. Truck Me syncs this data so drivers always see current access status. You also get alerts if a road on a saved route changes status.
What is the difference between approved and conditional?
An approved road has no restrictions for your vehicle class. A conditional road is accessible but has requirements attached, such as a weight limit below your gross, a time window (e.g. daylight only), a weather restriction, or a permit or escort requirement. Conditional roads show as amber on the map. Tap the segment to see exactly what the condition is.
Does one approval cover all heavy vehicles?
No. The NHVR designates separate networks by vehicle type. A road approved for a general access heavy vehicle is not automatically approved for a B-Double, and a B-Double approval does not carry over to a Road Train. The map overlay reflects the specific network for whichever vehicle you have selected.
Related guides
NHVR Approved Roads
What it means for a road to be approved, the National Network, B-Double and Road Train designations, and what happens if you use the wrong road.
NHVR Routing
How Truck Me calculates routes constrained to the NHVR network, vehicle class selection, dual-route comparison, and on-network incident avoidance.
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