Application of Integrated Modelling Suites to Support Business Case of Public Realm Scheme

Application of Integrated Modelling Suites to Support Business Case of Public Realm Scheme


Samya Ghosh, AECOM, Katherine Thorpe, AECOM


A paper followed up by presentation on an innovative urban realm and pedestrian safety focussed scheme in west London and the impact assessment techniques, including pedestrian modelling, used to inform design development and secure scheme approval.


This paper is intended to start with a brief background on the Southall Broadway scheme, discussing the identified issues and opportunities in the study area and the motivation behind the scheme inception.

The key challenges of the study will be discussed, including the requirement to balance the important but conflicting functions of Movement and Place. Further to this the agreed scheme objectives will be presented.

The design fundamentals of the Southall Broadway Boulevard scheme will be outlined. It will be explained how the design approach taken was to split the street into ‘boulevard zones’ and ‘street zones’ creating clear and obvious areas of informal pedestrian movement, allowing free flowing pedestrian movement across the street. The measures adopted to protect bus journey times will also be discussed.

Finally an overview of the application of micro-simulation vehicle and pedestrian modelling undertaken in VISSIM will be provided. This will discuss the challenges, the innovative techniques developed, the application of the modelling in design development and how this assessment was used within stakeholder consultation and to gain support for scheme approval. Lessons learnt will also be considered.

The paper will be structured in the following lines:

1. Background and Objective of the Scheme
2. Design Principles
3. Myths on the potential dis-benefits caused by increased congestion/delay
4. VISSIM modelling approach to innovatively interface pedestrians and vehicles
5. Robust modelling of bus gating using VISSIM
6. Appraisal of the Construction Phasing
7. Use of the VISSIM models for stakeholder consultation and approval process
8. Lessons Learnt


Association for European Transport