No PHP, no database and no admin login. Every page is a static file served by Cloudflare.
[ Read the announcement ]01 / Start
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.
Now / 01 – 04
A maintenance release with 12 enhancements and 16 bug fixes.
[ Read the release notes ]Drive SIDRA ASSIGN from your own code: write O‑D trip matrices and read the results.
[ Read the press release ]Our archive of 176 papers and reports, 1975 to 2026, is moving to this website.
[ Publications ]02 / Products
Flagship
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 ↗03 / Latest
Blog and News
www.sidrasolutions.com no longer runs on PHP
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
A maintenance release for SIDRA INTERSECTION 11, with 12 enhancements and 16 bug fixes . The highlights:
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.
04 / SIDRA Model
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
05 / Company
SIDRA SOLUTIONS
Contact
Talk to our team.
Sales, training and general enquiries
+61 3 9830 7123 · Mon to Fri, 9 am to 5 pm, Melbourne time
Reply within one business day · 25 resellers in 12 countries