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EIA Webinar – Traffic and Transport TA or EIA?. John Russell BEng (Hons) MIHT CMILT Director – Transport UK, Royal Haskoning [email protected] Question.

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Eia webinar traffic and transport ta or eia

EIA Webinar – Traffic and TransportTA or EIA?

John Russell BEng (Hons) MIHT CMILT

Director – Transport UK, Royal Haskoning

[email protected]


Question

Question

Is the traffic and transport chapter of an EIA a summary of the Transport Assessment (TA) or are they related, but clearly discrete pieces of work?


Let s investigate some assessment areas

Let’s investigate some assessment areas

Do TAs and EIAs use the same base data?

Do they have the same focus?

How do they deal with mitigation?

How do they deal with cumulative impacts?


But first my life history

But first…….my life history

Background is Civil Engineering – focus is on designing infrastructure

20 years experience – which spans the time before the “Environment” was discovered

“EIA will never catch on”, Source: John Russell, 1995

Reason for divulging this? To explain the difference in focus of “designers” and “EIA assessors”


Do they use the same base data

Do they use the same base data?

Qualitative and quantitative assessment of existing transport network?

Traffic and other transport surveys?

Accident analysis?

Development traffic forecasting?

Policy?


Do they use the same base data1

Do they use the same base data?

Transport Assessments and EIA traffic chapters use the same base data


Do they have the same focus

Do they have the same focus?

Planning Policy Guidance Note 13: Transport (PPG13) states that, where a new development is likely to have significant transport implications, a Transport Assessment (TA) should be prepared and submitted with a planning application for the development. It will then be used to determine whether the impact of the development on transport is acceptable.

Source: Paragraph 1.1, Guidance on Transport Assessment

The Environmental Statement should be a detailed statement of the significant effects of how the final design for the development will interact with the environment.

Source: Paragraph 1.16, Guidelines for the Environmental Assessment of Road Traffic


Do they have the same focus1

Do they have the same focus?

TA places an emphasis on the greatestvolume of traffic on the transport network

Is there enough capacity left during the busiest times after a development?

EIA places an emphasis on the greatest change in traffic

To an “innocent” bystander: what does the change in traffic volumes “feel” like to their environment?


Do they have the same focus2

Do they have the same focus?

Problem: increase in traffic volumes.

TA solution: increaseroadsizewhichresults in enoughcapacity. Job well done.

BUT

A potentially adverse EIA impact remainsbecause there has been a large change in traffic


Do they have the same focus3

Do they have the same focus?

Transport Assessments and EIA traffic and transport chapters have a different focus


How do they deal with mitigation

How do they deal with mitigation?

Introduction

Planning Policy Context

Assessment Methodology

Baseline Conditions

Likely Significant Effects

Mitigation Measures

Residual Effects

Cumulative Effects

Summary

Measures to influence

travel behaviour

Parking availability and

management

Improvements to non-car modes

Travel plan initiatives

Capacity management

Network alterations


How do they deal with mitigation1

How do they deal with mitigation?

Busy Junction

Existing settlement


How do they deal with mitigation2

How do they deal with mitigation?

Busy Junction

Proposed Development

Existing settlement


How do they deal with mitigation3

How do they deal with mitigation?

Proposed Development

Existing settlement


How do they deal with mitigation4

How do they deal with mitigation?

Does it form:

  • Part of the Proposed Development?

  • Associated Development?

  • Mitigation?

    In the TA process, it doesn’t matter

    In the EIA process it does


How do they deal with mitigation5

How do they deal with mitigation?

This dilemma especially the case for projects which involve substantial construction phases e.g. new Nuclear Build

Where do you draw the line between:

  • Enabling works?

  • Associated Development?

  • Mitigation?


How do they deal with mitigation6

How do they deal with mitigation?

Travel Plans: mitigation or Proposed Development?

In the TA a requirement prior to identifying mitigation

Measures to influence

travel behaviour

Parking availability and

management

Improvements to non-car modes

Travel plan initiatives

Capacity management

Network alterations


How do they deal with mitigation7

How do they deal with mitigation?

Transport Assessments and EIA traffic and transport chapters deal with mitigation differently


How do they deal with cumulative impacts

How do they deal with cumulative impacts?

EIA process simple:

Job done


How do they deal with cumulative impacts1

How do they deal with cumulative impacts?

TA simple:

Job done


How do they deal with cumulative impacts2

How do they deal with cumulative impacts?

But note 2 stage process in TA vs 3 stage process in EIA

Do we manufacture a 3 stage process to suit EIA?

But in arriving at Future Baseline we must make traffic growth projections

Traffic growth projections are based on the level of development expected

So are we double counting if we manufacture a 3 stage process?

Job done


How do they deal with cumulative impacts3

How do they deal with cumulative impacts?

Transport Assessments and EIA traffic and transport chapters deal with cumulative impacts differently


Conclusion

Conclusion

Q. Is the traffic and transport chapter of an EIA a summary of the Transport Assessment (TA) or are they related, but clearly discrete pieces of work?

Transport Assessments and EIA traffic and transport chapters use the same base data

BUT they:

  • have a different focus

  • deal with mitigation differently

  • deal with cumulative impacts differently

    A. They are clearly discrete pieces of work


So remember

So remember

Don’t be fooled: an EIA traffic and transport chapter is not a summary of a TA

The TA is about identifying the need for and providing transport capacity to cater for increases in travel demand

The EIA is about identifying and mitigating the effects of changes in traffic volumes on “innocent bystanders”


Eia webinar traffic and transport ta or eia1

EIA Webinar – Traffic and TransportTA or EIA?

Any Questions?

John Russell BEng (Hons) MIHT CMILT

Director – Transport UK, Royal Haskoning

[email protected]


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