Super B-double network rules

Victoria’s Super B-double network provides preapproved permit access for a range of configurations up to 117 tonnes gross combination mass (GCM).

A Super B-double is a Class 3 vehicle that exceeds higher mass limits. A Super B-double can have:

• Tri-axle groups on both trailers;
• A quad-axle group on the lead trailer and triaxle on the semi-trailer; or
• Quad-axle groups on both trailers.

Operators of vehicles that meet the requirements of the Super B-double network require a permit to travel on these routes. Access is restricted to the Port of Melbourne precinct. Network maps are viewable on the Department of Transport and Planning website. 

Operating conditions

Super B-doubles operating on the pre-approved
network must:

• Adhere to all conditions and restrictions specified on the network map;
• Be fitted with a self-steering axle on the last axle of each tri-axle or quad-axle when the combination exceeds 26 metres;
• Be fitted with an anti-lock braking system (ABS) on all axles;
• Be fitted with road-friendly suspension, except on the prime mover’s steer axle;
• Be fitted with a ‘long vehicle’ warning sign at the rear of the vehicle;
• Be fitted with side underrun protection to the European Standard;
• Be enrolled in the National Heavy Vehicle Accreditation Scheme - Mass Management Module;
• Operate within all manufacturer’s ratings, including the braking capabilities as per Australian Design Rules’ braking requirements at maximum load test; and
• Be able to maintain a minimum speed of 50km/h when travelling to and from Webb Dock as a combination, which may mean the combination operates at masses lower than specified above.

Maximum vehicle dimensions

The maximum height for a Super B-double is 4.3m. The maximum width is 2.5m. The maximum length is 30m.

Mass limits

Axle group mass limits

GCM by configuration