Transport Statement vs Transport Assessment: What's the Difference?
If you're preparing a planning application, you may be asked to submit either a Transport Statement (TS) or a Transport Assessment (TA).
At first glance, they sound very similar, and many people assume they're simply different names for the same document. In reality, they serve different purposes and are generally required for different types of development.
This guide explains the key differences and helps you understand which type of assessment may be appropriate for your project.
What is a Transport Statement?
A Transport Statement is a concise technical report that considers the transport impacts of a proposed development.
Its purpose is to demonstrate that the development can be safely accommodated by the surrounding highway network and that appropriate consideration has been given to access, parking, walking, cycling and public transport.
A Transport Statement is generally suitable where the transport impacts of a development are expected to be relatively modest.
What is a Transport Assessment?
A Transport Assessment is a more detailed and comprehensive study.
It is normally required for larger or more complex developments where there is potential for significant transport impacts.
In addition to considering the existing highway network, a Transport Assessment often includes detailed analysis of traffic generation, junction capacity, sustainable travel opportunities and mitigation measures needed to accommodate the development safely.
The objective is to demonstrate that the development can operate satisfactorily whilst minimising impacts on the surrounding transport network.
So, what's the difference?
The main difference is the level of detail.
A Transport Statement provides a proportionate assessment of developments with relatively limited transport impacts.
A Transport Assessment goes much further, providing detailed technical evidence where a development is likely to generate higher traffic volumes or where the transport implications are more complex.
Both documents aim to support a planning application, but the amount of analysis required will differ depending on the nature of the proposal.
When is a Transport Statement appropriate?
A Transport Statement may be suitable for developments such as:
Small residential developments
Changes of use
Small retail units
Drive-thru developments with modest traffic impacts
Healthcare facilities
Community buildings
Smaller commercial developments
The exact requirements will always depend on the individual site and the expectations of the Local Planning Authority.
When is a Transport Assessment required?
A Transport Assessment is more commonly required for developments such as:
Large housing developments
Business parks
Major retail schemes
Distribution and logistics facilities
Mixed-use developments
Large educational campuses
Hospitals
Strategic employment sites
Again, there are no universal thresholds. Each Local Planning Authority considers developments on their own merits.
What does a Transport Assessment typically include?
Although every project is different, a Transport Assessment may include:
Existing transport conditions
A review of the surrounding highway network, nearby junctions, speed limits, public transport services, walking and cycling facilities and any existing transport constraints.
Traffic surveys
Where necessary, traffic counts are undertaken to understand existing conditions and establish a baseline for assessment.
Trip generation
The likely number of vehicle, pedestrian and cycle trips generated by the proposed development is estimated using recognised industry data and professional judgement.
Junction capacity assessments
Specialist modelling software may be used to determine whether nearby junctions can accommodate the additional traffic generated by the development.
Parking and servicing
The adequacy of parking provision, servicing arrangements, refuse collection and vehicle manoeuvring are assessed.
Sustainable travel
The report considers opportunities to encourage walking, cycling and public transport use where appropriate.
Mitigation measures
Where impacts are identified, the assessment may recommend improvements such as highway alterations, pedestrian crossings, junction improvements or Travel Plans.
Who decides which report is needed?
Ultimately, the Local Planning Authority, advised by the Local Highway Authority, determines whether a Transport Statement or Transport Assessment is required.
Many authorities publish local validation requirements, but these are intended as guidance rather than absolute rules.
If there is any uncertainty, it is often worthwhile seeking pre-application advice before preparing a planning application.
Can the requirement change?
Yes.
During the planning process, additional information may be requested if the Local Highway Authority considers that the original assessment does not adequately address the transport impacts of the proposal.
Obtaining transport planning advice early in the design process can help identify these requirements before an application is submitted.
Which report do I need?
The answer depends on the size, location and nature of your development.
A relatively small proposal in an urban area with good access to public transport may only require a concise Transport Statement.
Conversely, a larger development or one located on a constrained highway network may require a full Transport Assessment supported by traffic surveys and detailed junction analysis.
An experienced transport planning consultant can advise on the most proportionate level of assessment before significant work is undertaken.
How DW Transportation can help
DW Transportation provides independent transport planning advice to developers, architects, planning consultants and landowners throughout South Wales and across the UK.
Whether your development requires a Transport Statement or a Transport Assessment, we provide clear, practical advice tailored to the needs of your project and the expectations of the Local Planning Authority.
Need advice?
If you're unsure which type of transport assessment your planning application requires, we'd be pleased to discuss your proposals.
Seeking advice at an early stage can help avoid delays, reduce unnecessary costs and ensure that the correct level of assessment is prepared from the outset.
Contact DW Transportation today for an informal discussion about your project.