22/08/2025
Understanding PSV Brake Testing Requirements
Ensuring the efficacy of braking systems on Public Service Vehicles (PSVs) is paramount for passenger safety and regulatory compliance. The Driver and Vehicle Standards Agency (DVSA) plays a critical role in setting and enforcing these standards. This article delves into the essential aspects of PSV brake testing, providing clarity on where to find crucial information, how secondary brake performance is assessed, and recent updates to inspection procedures.
Where to Find PSV Brake Force Requirements
Locating the specific brake force requirements for a PSV can sometimes be a point of confusion for operators and technicians. It's important to understand that PSVs are typically presented for testing in an unladen state and are tested as they are presented. The definitive source for individual vehicle brake force requirements is usually found within the PSV technical prints. These documents are often part of the vehicle's official computer technical records. Should you have difficulty accessing these, the Technical Support Service at Swansea is the designated authority to contact for this vital information.
Secondary Brake Performance: A Closer Look
The concept of secondary brake performance is a key component of PSV safety, ensuring that a vehicle can still be brought to a safe stop even if the primary braking system experiences a failure. The DVSA has made significant updates to its inspection manuals for both Heavy Goods Vehicles (HGVs) and PSVs, with changes implemented to streamline testing procedures while maintaining rigorous safety standards. These revisions stem from valuable feedback received from industry professionals, technical standards enquiries, and a thorough review of existing secondary brake testing protocols.
Key Updates to Inspection Manuals
The updated manuals introduce several changes, with two notable areas being lamps and secondary brake performance:
Lamps (IM63) and Direction Indicators/Hazard Warning Lamps (IM66)
The application notes within these sections have been revised to clarify the treatment of multiple lamps. Previously, the guidance might have referred to "more than 2" lamps. The updated note now explains that if 2 or more lamps are fitted, and their combined illuminated area covers 60% or more of the smallest rectangle that can enclose their illuminated area, they can be considered as a single lamp for inspection purposes. This change aims to simplify the assessment of lighting systems.
Secondary Brake Performance (IM72)
A significant focus of the recent updates has been the simplification of secondary brake testing procedures, in line with the requirements of Directive 2014/45/EU. This directive allows for an exemption from testing secondary brake performance on vehicles where the designated secondary brake is an integrated split braking system. In such cases, the DVSA will disregard any brake printout indicating a secondary brake failure and will not prompt for an alternative secondary braking option to be sought.
However, it is crucial to note the distinction for vehicles where the secondary braking system is entirely separate from the service braking system. This is often controlled via a manual brake control valve, such as a handbrake. For these vehicles, the testing procedure remains as usual. If a failure is recorded for secondary performance on these vehicles, the failure will be upheld. Nevertheless, the DVSA will not consider or seek out any alternative secondary brake mechanism if the designated one fails.
The DVSA is in the process of updating its computerised brake testing programmes to fully reflect these new requirements at the earliest opportunity. This ensures consistency between the manual guidance and the automated testing systems.
Summary of Secondary Brake Testing Changes
To provide a clearer overview, here's a summary of how secondary brake performance is now handled:
| Vehicle Type | Secondary Brake System Type | Testing Procedure | Failure Outcome |
|---|---|---|---|
| PSV | Integrated Split System (Designated Secondary) | Not tested if split system is designated secondary. | DVSA overrides any printout failure for secondary brake. Alternative secondary option ignored. |
| PSV | Separate from Service Brakes (e.g., Handbrake) | Tested as usual. | Failure stands. No alternative secondary brake considered. |
Further Information and Contact
For those who wish to consult the updated inspection manuals directly, they are available online. The DVSA encourages operators and technicians to familiarise themselves with these changes to ensure their vehicles meet the latest safety standards. For any specific queries or further clarification regarding these updates or PSV brake testing in general, the designated contact point is [email protected].
Frequently Asked Questions
Can I purchase the PSV inspection manual directly from the DVSA?
While the DVSA provides access to updated inspection manuals, direct purchase of physical copies might not be the primary method. Information and updates are typically made available through their official channels and website. It's recommended to check the DVSA website or contact them directly via [email protected] for the most current guidance on accessing their documentation.
What is considered the 'designated secondary brake'?
The 'designated secondary brake' refers to the specific braking mechanism identified and approved within a vehicle's design as the backup system in case of primary brake failure. For many PSVs, this might be a split braking system where different wheels are served by separate hydraulic circuits, or it could be a distinct parking or emergency brake system.
Why has the DVSA updated its testing procedures?
The DVSA regularly reviews and updates its testing procedures to enhance road safety, simplify processes where possible without compromising standards, and align with European directives and best practices. Feedback from the industry and technical analysis are key drivers for these revisions, aiming for a more efficient and effective inspection regime.
What happens if my PSV fails the secondary brake test?
If your PSV fails the secondary brake test, and it is a vehicle where the secondary brake is separate from the service braking system (e.g., a handbrake), the failure will be recorded. As per the updated guidelines, the DVSA will not look for or consider any alternative secondary braking options; the recorded failure will stand, and remedial action will be required to rectify the issue.
Staying informed about these regulations and ensuring your PSV's braking system is in optimal condition is not just a legal requirement but a fundamental aspect of responsible vehicle operation. By understanding these requirements and updates, operators can ensure their vehicles are safe, compliant, and ready for the road.
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