Modelling Workshop
Technical Presentations
Wednesday 20 July
Presentations
- Chair: Dave Keenan, Regional Head - Business Development (ANZ), Aimsun
- John Trieu, Associate Transport Engineer, WSP | Navigating the crossover between transport modelling, programming and software development
- Yiping Yan, Strategic Modeller, Transurban | Mind the gender gap: the hidden women's commuting in travel demand model, a new typology of workers in South-East Queensland, Australia
- Nick Fletcher, Managing Partner, Vivendi Consulting AND Lyndon Pereira, Chief Data Scientist, Vivendi Consulting - Using machine learning and big data to discover what makes people actually walk
- Dr Hai Vu, Professor of Transportation and Associate Dean of Research, Monash University - New Activity Based Modelling
John Trieu, Associate Transport Engineer | WSP
John Trieu
Associate Transport Engineer | WSP
John is a Chartered Engineer with over 9 years of experience providing advice on transport engineering and infrastructure projects. His experience covers a broad range of areas including transport modelling, data analytics, GIS mapping, programming and process automation, transport planning and traffic engineering. John uses this breadth of experience to solve problems innovatively and provide advice using new and different approaches.
He has extensive experience applying various transport modelling software packages to provide advice on transport network operations and planning. He is an experienced modeller using VISSIM/VisWalk, AIMSUN, EMME, SIDRA Intersection/Networks and HCS. John combines his transport modelling background with QGIS to analyse and present model outputs to provide a spatial context to his advice. He also uses Python programming to automate transport modelling and analytical processes, and to develop graphical user interfaces.
Navigating the crossover between transport modelling, programming and software development
With the increasing use of programming by transport modellers to automate processes such as model development (e.g. by tapping into software APIs), model results post-processing (e.g. generating model calibration / validation summaries, graphs and maps), and to implement new processes (e.g. machine learning), there is an increasing need to manage and maintain code with robust processes.
Recognising that many transport modellers learn programming and code management on-the-job (as opposed to formal training), this presentation draws on lessons learnt from working with professional software developers to build a web application; lessons that can be applied to writing code for transport modelling projects. These lessons include suggested practices in code management, documentation and testing that can be applied to transport modelling projects to maximise the robustness of code written, improve the ability to hand over code (e.g. to clients), and enable maintenance and updating the code in the future.
Yiping Yan, Strategic Modeller | Transurban
Yiping Yan
Strategic Modeller | Transurban
I am currently working on Transport Modelling area as a senior analyst with Transurban. My previous PhD research was dedicated to build a more sustainable, equitable, diverse, connected transport system through establishing the "why" and "how" of the high private schooling enrolment rate in Australia for the transportation sector and revealing the hidden gender gap in the conventional blue/white collar segmentation for commuters market.
A new typology of workers in South-East Queensland, Australia
Conventional transport model tends to segment commuters as either blue- or white-collar workers. Some have started to use more elaborate segmentations, more reflective of changes in labour markets, such as increased female participation. But often these have been introduced using deductive research approaches, in ways that can lack academic rigour. The highlight of our research is we proposing a new commuter market segmentation derived via an inductive approach “ unsupervised clustering analysis “ as applied to 2017-20 South East Queensland Travel Survey (SEQTS) data. Commuter types are grouped by occupational, industry, and socio-demographic variables (i.e., gender, age, household size, household vehicle ownership and worker skill score). After comparing the travel behaviour differences across groups and the silhouette width analysis on different cluster numbers(k=2,3,4,5,6,7,8), three clusters seem to produce the optimal result. When only three clusters are formed (k = 3) a market segmentation emerges with one female-dominated type (pink collar), one male-dominated type (blue collar) and one with both genders almost equally involved (white collar). There are nuances as to which workers are included in each segment, and differences in travel behaviours across the three types. Pink collar workers are mostly comprised of female clerical and administrative workers, community and personal service workers and sales workers. They have the shortest median commutes for both private motorized and active transport modes.
Nick Fletcher, Managing Partner | Vivendi Consulting
Nick Fletcher
Managing Partner | Vivendi Consulting
Nick has 20 years experience helping clients deliver challenging strategies and programs.
Nick has been a leader in global consulting firms in the UK, Europe, North America and Australia.
He is a founder of Vivendi Consulting, a firm that helps organisations bring their visions to life using multi-disciplinary thinking, human-centred design and advanced data analytics.
He has worked for clients including Transport for London, Infrastructure Australia and Infrastructure NSW.
Nick is typically engaged by Transport for NSW to deliver challenging initiatives. He managed the development of Sydney's Rail Future, the first published rail strategy for nearly two decades that underpinned Sydney Metro.
He has helped Transport for NSW to deliver the first Cycling and Micromobility Strategy, which supported the recent announcement of 30 strategic bike corridors in Sydney, covering 250km (dubbed Sydney's answer to London's super cycleway).
Most recently, Nick helped Transport for NSW create its first Walking and Placemaking strategy for NSW, which has produced some remarkable strategic insights into how and why people in NSW walk, and what government can do to encourage this.
Using machine learning and big data insights to find what actually makes people walk
Vivendi Consulting worked with Transport for NSW to answer the key question of "what makes people in NSW walk“ a question at the heart of our work to develop a strategy for Walking and Placemaking in NSW.
This challenging question needs a robust, evidence-based answer. In response we developed the Place Analysis and Walkability Scoring (PAWS) model, using sophisticated machine learning and neural network techniques. We understand this is the first time this data and analytical approach has been used.
The PAWS model uses billions of anonymised points of mobile phone walking data from 179 towns across NSW. PAWS uses machine learning to analyse actual walking against 117 walkability factors, grouped into:
- Structural factors: features that are 'inbuilt' into a centre and difficult to change.
- Adaptable factors: that can be relatively easily changed.
- Demographic factors
- Environmental factors
Our findings support academic studies that find that 'structural factors' such as housing and employment density, permeability and points of interest account for the majority of walking.
Population demographics explained around a quarter of the total observed amount of walking.
What is notable is that Adaptable factors such as trees, public transport, traffic speed accounted for less than one fifth of the total observed amount of walking.
This approach has yielded a huge number of additional insights. There are 'tipping' points for some variables: minimum measures above which walking is supported, but below which walking is suppressed. These include:
- Intersection density
- Housing density
Another key finding was the value of pedestrians.
The model shows that:
1. If we want to see people walking more around our centres, the fundamentals are vital.
2. These fundamentals tend to be inbuilt when centres are designed.
3. Making adaptable placemaking interventions, focused on centres that already have the walking fundamentals in place - is likely to lead to more walking.
Lyndon Pereira, Chief Data Scientist | Vivendi Consulting
Lyndon Pereira
Chief Data Scientist, Vivendi Consulting
Lyndon is a data scientist who uses innovative approaches and advanced analytics to uncover profound insights into the world.
Lyndon has an eclectic background in business analysis, engineering, data science, IT and systems analysis.
He has successfully delivered several projects for NSW government agencies including Transport for NSW as well as leading not-for-profit and government research organisations. Projects include:
- The recent development of the Place and Walkability System (PAWS) for Transport for NSW, that uses "big data" and machine learning to analyse what features of cities influence walking.
- Developing the Rail Opal Assignment Model (ROAM) for Transport for NSW, which combined Opal data and train operations data to predict passenger numbers per train.
- Analysis of an array of datasets to provide customer and rail operations insights.
- Development of business analytics and reporting for the largest food relief organisation in Australia.
- Developing the Hunger Report, now in its 8th year, an award-winning reference report on food insecurity in Australia.
- Solving diverse technical challenges in high-tech projects for CSIRO.
Lyndon combines a methodical approach to problem solving with unconventional thinking, drawing on techniques and approaches from diverse disciplines.
Using machine learning and big data insights to find what actually makes people walk
Vivendi Consulting worked with Transport for NSW to answer the key question of "what makes people in NSW walk“ a question at the heart of our work to develop a strategy for Walking and Placemaking in NSW.
This challenging question needs a robust, evidence-based answer. In response we developed the Place Analysis and Walkability Scoring (PAWS) model, using sophisticated machine learning and neural network techniques. We understand this is the first time this data and analytical approach has been used.
The PAWS model uses billions of anonymised points of mobile phone walking data from 179 towns across NSW. PAWS uses machine learning to analyse actual walking against 117 walkability factors, grouped into:
- Structural factors: features that are 'inbuilt' into a centre and difficult to change.
- Adaptable factors: that can be relatively easily changed.
- Demographic factors
- Environmental factors
Our findings support academic studies that find that 'structural factors' such as housing and employment density, permeability and points of interest account for the majority of walking.
Population demographics explained around a quarter of the total observed amount of walking.
What is notable is that Adaptable factors such as trees, public transport, traffic speed accounted for less than one fifth of the total observed amount of walking.
This approach has yielded a huge number of additional insights. There are 'tipping' points for some variables: minimum measures above which walking is supported, but below which walking is suppressed. These include:
- Intersection density
- Housing density
Another key finding was the value of pedestrians.
The model shows that:
1. If we want to see people walking more around our centres, the fundamentals are vital.
2. These fundamentals tend to be inbuilt when centres are designed.
3. Making adaptable placemaking interventions, focused on centres that already have the walking fundamentals in place - is likely to lead to more walking.
Dr Hai Vu, Professor of Transportation and Associate Dean of Research | Monash University - New Activity Based Modelling
Dr Hai Vu
Professor of Transportation and Associate Dean of Research | Monash University - New Activity Based Modelling
Hai L. Vu is a Professor of transportation and Associate Dean of Research in the Faculty of Engineering, Monash University. He is a recognised international leading expert in network modeling and planning with strong research credentials in mobility demand modeling, strategic transport planning, intelligent transport systems (ITS), V2X communications and connected autonomous vehicles (CAVs).
Prof. Vu has over 20 years of research experience in network modelling and performance evaluation of complex networks with research spans several disciplinary areas ranging from signal processing and data mining (AI) to mathematical modelling and optimisation of data and road traffic networks. He has authored or co-authored over 200 scientific journals and conference papers in these areas, and is a recipient of the 2012 Australian Research Council (ARC) Future Fellowship and the Victoria Fellowship Award for his research and leadership in ITS.
Prof. Vu is currently leading the Monash team and research activities focusing on the transport demand modelling, planning and related problems.
Monash Mobility Model (M3) for strategic transport modelling and planning
In this talk I will introduce the new Monash Mobility Model developed by our research group in the Institute of Transport Studies at Monash.
Monash Mobility Model (or M3) is an advanced, comprehensive Activity-Agent-based Framework which fully integrates an activity-based module including activity generation, scheduling and location choice with a multi-modal agent-based dynamic traffic simulation coupling via an automated optimization and calibration processes.
M3 leverages big data, AI/machine learning, optimization calibration and econometric behavioural models to deliver realistic activity and mobility patterns of a synthesis population in large cities. Monash Mobility Model (or M3) can assist transport planners and policy makers to evaluate various strategic transport planning scenarios and different transport policies including emerging and future mobility services with a great level of detail and accuracy.