Safe transport infrastructure requires more than meeting design standards. Roads, intersections, accessways, pedestrian facilities, and cycle infrastructure also need to work safely when they are used by real people in real-world conditions.
A road safety audit provides an independent assessment of a transport project, helping identify potential safety concerns before they contribute to crashes or other operational problems. Audits can be undertaken throughout the life of a project, from early concept design through to completion.
This guide explains how road safety audits work, when they may be required, what auditors assess, and how the process can support safer transport projects across New Zealand.
What Is a Road Safety Audit?
A road safety audit is a formal and independent review of a transport project from a road safety perspective.
Rather than checking whether a design simply complies with standards, the audit considers how different road users are likely to interact with the proposed infrastructure. This can reveal risks that may not be immediately apparent from drawings or technical specifications alone.
The findings are documented within a road safety audit report, providing the project team with identified safety concerns and recommendations for consideration.
Learn more about Traffic Planning Consultants' Road Safety Audit services.
Why Are Road Safety Audits Important?
Transport environments involve people with different levels of experience, ability, and awareness. Drivers make mistakes, pedestrians may take unexpected routes, and cyclists can be particularly vulnerable where infrastructure creates conflicts with vehicles.
A technically compliant design can therefore still contain practical safety concerns.
Following appropriate road safety audit guidelines provides another layer of review, helping project teams identify these risks while there is still an opportunity to address them.
Finding an issue during design is generally considerably easier than trying to correct it once infrastructure has been constructed and opened to the public.
When Is a Road Safety Audit Required?
The need for an audit depends on the project, approval requirements, and the expectations of the relevant road controlling authority.
Audits may be appropriate for new roads, intersection upgrades, subdivisions, access changes, cycling infrastructure, pedestrian improvements, and other projects that alter how people interact with the transport network.
For development projects, early traffic planning can help determine whether an independent safety review is likely to form part of the design or approval process.
Even where an audit is not specifically required, one may still provide valuable assurance for projects involving complex or unusual transport environments.
What Are the Main Road Safety Audit Stages?
Different road safety audit stages allow potential risks to be considered as a project progresses.
An audit may be undertaken during feasibility or concept design, when major decisions about the layout are still flexible. Further reviews can then occur during preliminary and detailed design as specific features are developed.
A pre-opening audit can assess the completed infrastructure before it becomes fully operational. Existing roads may also be reviewed where there are concerns about current safety performance.
The appropriate stages will depend on the scale, complexity, and requirements of the project.
What Does a Road Safety Auditor Look For?
An auditor considers the transport environment from the perspective of different users and identifies features that could contribute to crashes or increase the severity of an incident.
This may include sight distances, intersection layouts, vehicle speeds, road geometry, signage, markings, lighting, roadside hazards, pedestrian crossings, cycling facilities, and access arrangements.
The review also considers how these elements interact. A feature that appears appropriate in isolation may create a safety concern when combined with surrounding traffic movements or infrastructure.
Where wider network performance needs to be understood, traffic engineering can provide additional analysis alongside the safety review.
Considering Pedestrians and Cyclists
A comprehensive road safety audit considers everyone using the transport environment, not just motorists.
Pedestrians and cyclists can be particularly vulnerable where infrastructure creates unclear priority, limited visibility, difficult crossings, or conflicts with turning vehicles.
Auditors consider whether facilities are understandable and practical for users of different ages and abilities. This can be especially important around schools, commercial centres, public transport facilities, and areas with high levels of pedestrian activity.
How Does the Road Safety Audit Procedure Work?
The exact road safety audit procedure will depend on the project, but the process generally begins with reviewing relevant plans, supporting information, and the surrounding transport environment.
Auditors then identify potential safety concerns and document their findings. Depending on the project stage, a site inspection may also form an important part of understanding how the proposed or completed infrastructure interacts with existing conditions.
The findings are then provided to the project team for consideration and response.
Maintaining independence between the audit team and the original design team is an important part of the process. It provides a fresh perspective rather than simply asking designers to review their own work.
What Is Included in a Road Safety Audit Report?
A road safety audit report clearly documents the concerns identified during the review.
Each issue should provide enough information for the project team to understand the nature of the risk and why it has been raised. Recommendations may also be provided to indicate how the concern could be addressed.
The report creates a clear record of the audit process and allows designers, clients, and other stakeholders to consider each finding before deciding on an appropriate response.
Does an Audit Automatically Require Design Changes?
An audit identifies safety concerns, but it does not replace the role of the designer or project decision-maker.
The project team reviews the findings and determines how each issue should be addressed. In some cases, the recommended solution may be adopted directly. In others, the team may identify an alternative way to manage the risk.
The important point is that the safety concern has been formally identified and considered rather than remaining unnoticed until the infrastructure is operational.
Road Safety Audits and Traffic Impact Assessments
A road safety audit and a traffic impact assessment serve different purposes, although both can contribute to better project outcomes.
A traffic impact assessment generally considers how a development affects the wider transport network, including matters such as traffic generation, access, parking, and intersection performance.
A road safety audit focuses specifically on potential safety concerns within a design or existing transport environment.
Some projects may benefit from both, particularly where a development creates significant changes to roads, intersections, or access arrangements.
Why Independent Review Matters
Design teams naturally become familiar with the projects they work on. That knowledge is valuable, but familiarity can also make certain assumptions or risks harder to recognise.
Independent auditors approach the project without those existing assumptions.
This fresh perspective is one of the main strengths of the road safety audit process. It allows the design to be considered specifically from a safety perspective and can identify issues before they become embedded in the finished infrastructure.
When Should a Road Safety Auditor Be Engaged?
Early engagement provides the greatest opportunity to influence a project.
At concept or preliminary design stage, significant changes may still be relatively straightforward. Once detailed design is complete or construction has begun, resolving the same issue can become considerably more difficult and expensive.
Integrating safety review with wider transportation planning allows project teams to consider network performance, accessibility, and safety together rather than treating them as separate issues later in development.
Supporting Safer Transport Projects
The purpose of a road safety audit is ultimately straightforward: identify potential risks before they result in harm.
A structured and independent review gives project teams an opportunity to improve designs, challenge assumptions, and make informed decisions about safety throughout project delivery.
Traffic Planning Consultants provides independent road safety, traffic engineering, and transport planning expertise for projects throughout New Zealand.
From early design reviews through to pre-opening assessments, experienced safety input can help ensure transport infrastructure performs effectively when it matters most.
Contact Traffic Planning Consultants to discuss whether a road safety audit is appropriate for your project.
