Dedicated to the transport profession worldwide
Our mission is to contribute to the transport profession worldwide for the benefit of the community through contributing to safe, environment-friendly and efficient traffic operations.
Three live online programs in November: SIDRA Model Fundamentals, Project Managers & Reviewers, and Introduction to SIDRA. Each carries CPD and PDH hours and a certificate of completion.
Live online programs and in-person workshops, delivered by the SIDRA development team. Each carries CPD and PDH hours and a certificate of completion.
A maintenance release for SIDRA INTERSECTION 11, with 12 enhancements and 16 bug fixes. The SIDRA API can now read and write SIDRA ASSIGN data.
Browse 178 papers and reports, 1975 to 2026. Search by title, author or topic and download the publications.
SIDRA Model Fundamentals
Project Managers & Reviewers
Introduction to SIDRA
Next dates to be announced
SIDRA INTERSECTION 11
Lane-based micro-analytical traffic modelling software, used by transport engineers, traffic planners and road authorities in over 80 countries.
sidraintersection.com →Included in 11SIDRA ASSIGN
Unique micro-analytical traffic assignment functionality integrated with the detailed lane-based multimodal Network model provided in the SIDRA INTERSECTION software.
SIDRA ASSIGN →For developersSIDRA API ↗
Drive the software from your own code.
api.sidrasolutions.com ↗Blog and News
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From 23 October 2026, the pages on www.sidrasolutions.com are served as static HTML files on Cloudflare Pages. The website no longer uses Drupal or PHP.
SIDRA INTERSECTION 11.0.4 Out Now
SIDRA INTERSECTION 11.0.4 is out, with 12 enhancements and 16 bug fixes. The SIDRA API can now read and write SIDRA ASSIGN data.
Drive SIDRA ASSIGN from your own code.
From 11.0.4, the SIDRA API can read and write SIDRA ASSIGN data: zones, O-D trip matrices, assignment settings and results. Write the O-D trip matrix for your study…
SIDRA Downloads Is Now Live
A new computer to set up. An older version for an existing project. A package your IT team can deploy. SIDRA Downloads has all three ready for you.
The modelling behind SIDRA
- 01What is good about analytical traffic modelling?Dr Rahmi Akçelik has published a report presenting a brief discussion of why traffic modellers use analytical models for traffic and…7 min
- 02Why do we call SIDRA micro-analytical?The SIDRA model is termed micro-analytical because it provides a highly detailed, lane-based analysis of traffic intersections,…1 min
- 03Transport and Traffic Modelling for Project ManagersA detailed critique report entitled Transport modelling for project managers - critique of AUSTROADS Report AP-R621-20 was published in…2 min
- 04NETWORK ModelAnalytical models for traffic design, operations and planning practice facilitate better knowledge and understanding of the laws that rule…9 min
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