Transport Modeller

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We are looking for a Transport Modeller with 5+ years of hands-on experience in PTV Visum to develop, calibrate and apply strategic travel demand models. The role supports traffic forecasting, public transport ridership estimation and transport infrastructure appraisal for highways, urban mobility, metro/MRTS and feasibility studies.

Key Responsibilities

• Build and update multi-modal transport models in PTV Visum: network coding, zoning systems, connectors, link types, volume-delay functions (VDF/BPR), turn penalties and junction capacity.
• Run the four-stage model (trip generation, trip distribution, mode choice, traffic assignment) for base and horizon years.
• Develop and calibrate OD matrices, including matrix estimation (TFlowFuzzy) from classified volume counts and OD surveys.
• Carry out private transport assignment (equilibrium, equilibrium Lohse, ICA) and public transport assignment (timetable-based, headway-based) for ridership estimation.
• Calibrate and validate models against observed data using GEH statistic, screenline and R² checks per DMRB/TAG/IRC standards.
• Run scenario testing and forecasting: network improvements, land-use changes, tolling, route rationalisation and demand growth.
• Use Procedure Sequence, Python/COM scripting and VBA to automate model runs and outputs.
• Extract and prepare outputs: PCU volumes, V/C ratios, Level of Service (LoS), travel time savings, VKT/VHT, select-link and select-zone analysis, flow bundles.
• Supply model inputs for economic appraisal (cost-benefit analysis, EIRR/FIRR, HDM-4) and toll revenue / traffic studies.
• Analyse traffic survey data: CVC, OD, TMC, speed-delay, parking and household surveys.
• Write model development reports (MDR), forecasting reports and presentations for clients and approving authorities.
• Coordinate with microsimulation teams (PTV Vissim) on demand inputs and junction-level studies.

• M.Tech / M.E. / M.Sc. in Transportation Engineering, Transport Planning or Urban Planning (B.Tech/B.E. Civil with relevant experience considered).
• 5+ years of transport modelling experience with strong command of PTV Visum.
• Sound understanding of travel demand modelling theory: gravity models, logit/nested logit mode choice, assignment algorithms.
• Experience on at least some of: highway/expressway feasibility (DPR), Comprehensive Mobility Plans (CMP), metro/BRT/MRTS ridership, Traffic Impact Assessment (TIA), toll plaza studies.
• Working knowledge of IRC codes, MoRTH/NHAI guidelines and international standards (WebTAG/TAG, DMRB).
• Strong Excel, GIS (QGIS/ArcGIS) and data-handling skills; Python preferred.
• Clear technical writing and client-facing presentation skills.

• Exposure to PTV Vissim, CUBE, EMME, TransCAD or SATURN.
• Experience with activity-based models, land use–transport interaction (LUTI) or big data (GPS, mobile/app data, smart-card data).
• Experience mentoring junior modellers and reviewing model QA/QC.

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About AECOM 

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan. 

AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients’ complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2025. Learn more at aecom.com. 

What makes AECOM a great place to work 

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you’ll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you’ve always envisioned. Here, you’ll find a welcoming workplace built on respect, collaboration and community - where you have the freedom to grow in a world of opportunity. 

As an Equal Opportunity Employer, we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines.