Heavy & Multi Combination blind spots

Heavy vehicles, especially B-doubles and road trains, have larger and more complex blind spots:

Front blind spot: Up to 4 metres ahead of the cab, especially in bonneted trucks.
Side blind spots: Extend over one full lane width on either side—especially on the left near-side.
Rear blind spot: Vehicles over 12.5m long cannot see directly behind; there is no rear-view mirror coverage.
Articulation points: In MCs, turning amplifies blind zones between units and trailers.

Tip: Fit wide-angle mirrors, class V and VI mirrors, or use camera systems to improve coverage.

Use Mirrors Strategically

NHVR and state regulators recommend:

Frequent mirror checks every 8–10 seconds on highways.
Adjust convex and spot mirrors to capture trailer swing, especially for quad dog or B-double configurations.
When reversing or coupling, always use a spotter or camera due to limited rear visibility.

Maintenance Tip: Clean mirrors and cameras daily—dirt, bugs, or rain reduce visibility.

Communicate Your Intentions Early

Due to blind spots, signal intentions well in advance to give light vehicle drivers time to adjust. This includes:

Fact: Tailgaters and drivers in your side blind zones often cannot see your indicators or brake lights clearly—assume they are unaware.

Blind Spots During Turning

With long trailers:

Left turns: Swing wide but watch the near-side blind spot—cars, bikes, or pedestrians can sneak up unnoticed.
Right turns: The rear unit can cut the corner sharply; use mirrors and turn slowly to prevent collisions with street furniture or kerbs.

Legal Consideration: Under CoR, failure to manage these risks can result in liability even if the driver doesn’t see the hazard.

Trailer Tracking and Rear Swing Hazards

Multi-trailer configurations often have:

Rear-end swing during cornering
Increased tracking offset—meaning the rear trailer doesn’t follow the same path as the prime mover

This creates large, unexpected blind zones at intersections, roundabouts, and service centres.

Mitigation: Use escort vehicles when required, swing wider on turns, and always check pivot points before moving off.

Technology to Support Blind Spot Management

Many Australian fleets are investing in:

These improve safety outcomes and can be used to demonstrate compliance during audits or CoR investigations.

When Stopped or Reversing

Even with cameras:

Never reverse blind—use a spotter, especially in yards or delivery areas.
Check for pedestrians and forklifts in mirror and side zones before moving off.
Pause 3 seconds before reversing to allow final checks and potential movement in the blind zone.

Legal & Safety Reinforcement (Australia)

National Heavy Vehicle Law (NHVL) places a legal obligation on operators and drivers to manage risk, including blind spot awareness.
Breaches resulting in injury or near-miss incidents can trigger penalties for both drivers and executive officers under CoR.

Summary Cheat Sheet for Drivers - Blind Spot: Risk Mitigation: Mitigation

Front (4m): Can’t see cars or pedestrians: Use elevated seating, stop short at crossings
Left Side: Bikes, merging cars: Use class V mirrors, check every 10 sec
Right Side: Wide turns, overtaking: Mirror checks, signal early
Rear (12m+): Backing into pedestrians/objects: Use spotters and rear cameras.
Articulation Point: Cut-ins during turns: Turn slowly, use wide-angle mirrors