We provide trip generation and trip distribution analysis to understand both the scale of movement created by a development and how those trips will spread across the transport network. This combined analysis forms a core part of transport assessment, helping to identify likely impacts, areas of sensitivity and the need for mitigation.
By considering generation and distribution together, we provide a realistic picture of how development will interact with the surrounding network.
What is trip generation and trip distribution analysis?
Trip generation analysis estimates how many trips a development is likely to create, while trip distribution analysis forecasts where those trips originate and where they travel to. Together, they determine which junctions, corridors and routes are affected by development traffic.
This analysis underpins junction capacity assessments, traffic modelling and transport strategies, and is routinely scrutinised by Local Highway Authorities and other consultees during the planning process.
Our trip generation and trip distribution analysis is tailored to the site, land use and stage of development and typically includes:
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Person trip generation and mode-specific trip forecasts
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Vehicle trip rates and traffic generation estimates
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Traffic distribution across the local and wider network
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Use of the TRICS database and comparable site data
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Application of ONS Census Journey to Work data or similar
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Estimate of internalisation of trips
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Evidence on the proportion of primary, linked, pass-by and diverted trips
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Clear plans, tables and diagrams illustrating assumptions and outputs
The value of integrated trip generation and distribution analysis lies in providing a coherent and defensible picture of development impact. By aligning how many trips are forecast with where those trips are expected to travel, we help clients avoid assessments that misrepresent network effects or focus on the wrong locations. This approach supports proportionate assessment, better-targeted junction analysis and clearer justification of mitigation. It also strengthens engagement with highway authorities by demonstrating that forecasts are grounded in evidence, context and professional judgement rather than generic assumption.
When trip generation and distribution analysis is needed
Trip generation and distribution analysis is commonly undertaken:
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To support Transport Assessments or Statements
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Ahead of junction capacity checks or modelling
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During pre-application discussions
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For developments affecting multiple junctions or corridors
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For employment, education and healthcare sites
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As part of strategic land or Local Plan evidence
Early clarity helps shape assessment scope and reduce later challenge.
Our approach
We take a clear, proportionate approach to trip analysis:
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Understand the development type, scale and operation
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Establish realistic trip generation across modes
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Select appropriate distribution datasets and methods
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Apply evidence-led assumptions with transparency
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Present outputs clearly with explanation of implications
Our focus is on ensuring forecasts are realistic, clear and support informed decision making.
Who we support
We undertake trip generation and distribution analysis for:
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Residential and mixed-use developments
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Commercial and employment sites
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Education and healthcare facilities
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Retail and leisure uses
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Strategic and phased developments
Our experience across England, Scotland and Wales ensures analysis aligns with local authority expectations.
Need clear evidence on trip generation and distribution at your development?
Get in touch and we will provide robust, proportionate trip analysis to support your proposals.
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