Bus Engineering, VASS Certification & 25-Year Frame Inspections
Who can certify bus seating, wheelchair-restraint and seating-layout modifications in Victoria? Commercial Vehicle Compliance (CVC) provides engineering assessment and VASS certification for applicable bus seating, restraint, access and structural modifications in Victoria. CVC also carries out 25-year bus structural frame inspections.
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Bus compliance in Victoria: CVC supports bus modifications, engineering assessment and 25-year structural inspections. Depending on the project, the relevant framework can include VASS, bus safety requirements, ADRs and NHVR modification guidance. See Transport Victoria VASS and Safe Transport Victoria bus operator guidance.
Commercial Vehicle Compliance (CVC) provides engineering assessment and VASS certification for bus modifications in Victoria, together with 25-year bus frame safety inspections. We support bus operators, body builders and repairers with seating changes, ADR 68 seat installations, wheelchair access, body and structural modifications, frame repairs and other compliance work.
A bus is generally a passenger vehicle with 10 or more seating positions including the driver, ranging from small community buses through to large route buses and specialist passenger vehicles.
But one thing in common for all Buses in Victoria is the annual Bus Safety Inspection. Every 12 months Buses must undergo an annual Bus Safety Inspection carried out by a licensed vehicle inspector. This is to satisfy a minimum level of safety and standards expected when used for the transportation of passengers.
Bus Modifications
Common Modifications
Due to the long life of a Bus, they can undergo modifications from refurbishments to major modifications within their lifespan. These might include:
- Changes to seating capacity.
- Installation of ADR 68 compliant seats.
- Fitment of side doors.
- Fitment of wheelchair loaders and wheelchair positions.
- Removal of toilets and body modifications.
- Frame rebuilds from major accident damage
Many of these bus modifications require engineering assessment and VASS certification, depending on the vehicle category, modification and applicable standards. CVC can review the proposed change before work starts and identify the likely inspection, evidence and certification requirements. Contact CVC to discuss the project.
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How to make your Fleet last longer
25 Year Bus Frame Inspections
See our dedicated 25-year bus frame inspection service and inspection process.
Commercial Vehicle Compliance provides 25-year bus frame safety inspections in Victoria. For buses more than 25 years old, the vehicle must have a current acceptable structural assessment available for the annual bus safety inspection. The VASS inspection focuses on the structural condition of the body and frame, with documented inspection areas and photographs. Where corrosion, loose panels, damaged structure or other warning signs are found, more extensive panel removal and frame inspection may be required. Any structural repairs should be completed to the applicable requirements before the assessment is finalised.
Exemptions to Bus Mass Limits
We are all getting heavier
Bus seating capacity, tare mass, axle loads and legal mass limits need to be considered together. A bus can be within its overall mass limit and still exceed an axle, tyre or manufacturer rating, particularly after seating, wheelchair-access or equipment changes. Where seating capacity changes, the applicable ADR category and mass assumptions must also be reviewed.
For current seating-capacity guidance, see Transport Victoria VSI 19. For current heavy-vehicle mass limits and notices, refer to the NHVR mass limits guidance.






















