Why Your Truck GPS is Sending You Under Bridges: The NHVR Network Gap

More Than One Bridge Strike a Day

Queensland recorded 369 bridge strikes in 2023/24. That's more than one every single day. Melbourne's Napier Street bridge alone was hit 37 times between 2018 and 2022. Thirty-seven times on the same bridge, in four years.

These aren't all reckless drivers. Many of them followed a GPS. The GPS sent them down that road. The GPS didn't know, and that's the problem.

NHVR approved routes exist specifically to prevent this. The data is there. The approved road network is mapped, maintained, and publicly accessible. Your GPS just isn't using it.

Why Your GPS App Fails You

Google Maps is built for cars. Waze is built for cars. Apple Maps is built for cars. They route around traffic, find the fastest path, and avoid road closures. They do not know:

• Your vehicle's height, length, or weight
• Which roads are approved for B-Doubles or Road Trains
• Which bridges have clearance limits below your rig
• Whether that residential street has a 3-tonne weight restriction

When you enter a destination, these apps find the shortest or fastest path through the general road network. For a car that's fine. For a 4.5-metre-high semi-trailer, that route might go straight under a 4.2-metre bridge.

There's no malice here. These companies have billions of car users. Heavy vehicle routing is a specialised problem they haven't solved, and most of them aren't trying to.

What the NHVR Network Actually Is

The National Heavy Vehicle Regulator (NHVR) maintains something called the National Network Map. This is the authoritative record of which roads in Australia are approved for specific heavy vehicle types, B-Doubles, Road Trains, Performance Based Standards (PBS) vehicles, and more.

Every road segment in the network carries an access code:

• General Access, approved for your vehicle type, no conditions
• Conditional Access, approved, but with restrictions (time windows, weight limits, escort requirements, bridge clearance conditions)
• Restricted, your vehicle type is not permitted on this road

The critical word is "specific." A road approved for a 19-metre semi might be restricted for a 26-metre B-Double. A bridge that handles a rigid truck might not handle your PBS combination. The network is built vehicle-by-vehicle, and the right route depends entirely on what you're driving.

This is not information Google Maps has. It's not information Waze has. And without it, any route these apps give a heavy vehicle driver is essentially a guess.

The Real Cost of Getting It Wrong

A bridge strike isn't just embarrassing. The consequences stack up fast:

• Infringement fine: $1,290 plus 4 demerit points
• Court-referred offence: up to $12,904
• Vehicle damage: radiators, cab roofs, load containment, rarely cheap
• Road infrastructure damage: bridge repairs can run into hundreds of thousands
• Delays: road closures, emergency response, tow trucks, paperwork
• Liability exposure: if your cargo damages property or injures someone

Fleet managers carry additional exposure. If a driver uses an app that wasn't fit for purpose, and follows a route that results in a strike, the question of due diligence becomes uncomfortable very quickly.

The NHVR approved routes data exists to make compliance straightforward. The gap is that nothing has connected that data directly to turn-by-turn navigation, until now.

What Good Truck Navigation Should Do

A navigation app built for heavy vehicles should do a few things that consumer GPS apps simply cannot:

Route only on approved roads. When you select your vehicle type, B-Double, Road Train, PBS, every route calculated should use only roads approved for that combination. Not probably-fine roads. Approved roads.

Warn you before you commit. A bridge warning that fires when you're 500 metres away might not give you enough room to turn around a 36-metre road train. The warning needs to happen before you turn onto that road, not after.

Show you what the map actually means. Green roads are approved. Amber roads are conditional, tap them to see the conditions. Red roads are restricted. At a glance, you know what's open to you.

Keep information current. Road access changes. Bridges get load-rated. New restrictions get added. Saved routes should be automatically checked against the current network, with alerts when anything changes.

Truck Me: Built on NHVR Data

Truck Me integrates directly with the NHVR network. Select your vehicle type and every route uses NHVR approved routes only. The map shows real-time access status for every road you can see.

Bridge warnings fire in two stages: first when you're about to turn onto a road with a low clearance ahead, then again at 500 metres. That gives you time to make decisions before you're committed.

This is what heavy vehicle navigation should have been from the start.

Join the waitlist at trucksheet.au and be first in line when we launch.