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SIDRA INTERSECTION is powerful software used as an aid for design and evaluation of individual intersections and networks of intersections. It can be used to analyse signalised intersections (fixed-time / pretimed and actuated), signalised and unsignalised pedestrian crossings, roundabouts (unsignalised), roundabouts with metering signals, fully-signalised roundabouts, two-way stop sign and give-way / yield sign control, all-way stop sign control, single point interchanges (signalised), freeway diamond interchanges (signalised, roundabout, sign control), diverging diamond interchanges. It can also be used for uninterrupted traffic flow conditions and merge analysis.

Download: SIDRA INTERSECTION Features.pdf

SIDRA INTERSECTION allows modelling of separate Movement Classes (Light Vehicles, Heavy Vehicles, Buses, Bicycles, Large Trucks, Light Rail / Trams and two User Classes) with different vehicle characteristics. These movements can be allocated to different lanes, lane segments and signal phases, for example for modelling bus priority lanes at signals. Read more..

See Latest Version Information here.

Learn more about SIDRA INTERSECTION:






We have released some great tutorial videos for SIDRA INTERSECTION 8.
Visit and subscribe to our YouTube channel for these and more tutorial videos.


Network Analysis Enhancements & Improved Workflow Efficiency

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SIDRA INTERSECTION 8 offers much improved network model processing efficiency and much improved workflow efficiency through substantial enhancements to the user interface including improved visualisation and new output reports and displays. It also incorporates various important model improvements.

Read more about the powerful new features in SI-8..


Most widely used software tool in the USA

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According to the US Transportation Research Board document "Roundabout Practices", SIDRA INTERSECTION is the most widely-used software tool in the USA for roundabout capacity and performance analysis, followed by Synchro and HCS, based on a survey of state transportation departments (based on 28 of the 37 state agencies responding to the survey question).

The report also states "To analyze roundabout performance, about three-quarters of the reporting states use some form of the Highway Capacity Manual 2010 model and SIDRA’s Standard Model; about one-quarter use some form of the United Kingdom equations. (Because states were allowed to select more than one operational performance model, there is some overlap.)"

The report "Roundabout Practice, A Synthesis of Highway Practice, National Cooperative Highway Research Program, NCHRP SYNTHESIS 488, TRB, Washington, D.C., 2016" can be downloaded from the National Academies Press (NAP) website.


Benefits of using SIDRA INTERSECTION

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The benefits of the SIDRA INTERSECTION software include the following;

  • a unique lane-based analytical road traffic Network model
    • helps the traffic engineering profession to find and implement measures to alleviate congestion and handle complicated network design, planning and operation cases with greater confidence and in an efficient way;
    • helps to achieve road network performance improvements that will deliver large economic and community benefits;
    • provides the functionality to model movement classes to enable the traffic engineering and transport planning profession design and assess such measures as bus priority lanes, bicycle lanes, tram /light rail lanes and signals;
  • energy and emission models help to assess environmental impacts of proposed traffic design, operations and planning schemes with a practical calibration method that enables the SIDRA INTERSECTION models to be used for modern vehicles;
  • a method that takes into account the intersection geometry and flow conditions automatically in determining capacity of sign-controlled intersections;
  • a method that allows for the effects of vehicle bunching caused by upstream traffic signals in determining capacity of roundabouts;
  • a Network model that includes detailed movements of vehicle platoons with lane changes between signalised intersections for assessing the efficiency of signal coordination systems and optimising signal timings for signalised intersection networks to allow signal timing plans to be prepared for existing networks and used as part of assessment of proposed networks;
  • enhanced network timing calculation methodology to determine network cycle time, phase time and signal offsets for signal coordination in signalised intersection networks, and to determine timings for Common Control Groups (several signalised intersections controlled by a single signal controller);
  • a timing method that differs from existing methods in being derived from a lane-based network model that allows for queue spillback effects of signal timings;
  • a method to enable preparation of route-based signal coordination plans that are suitable for use in existing signal control systems such as SCATS used in Australia and worldwide.



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SIDRA INTERSECTION 8 is now available for purchase from our online store.

Available in two versions - PLUS & NETWORK - these offer exactly the same functionality, except you can model up to 20 intersections with the NETWORK version. With the PLUS version you can model one or two intersections. 


Please contact our Sales Department is you have any questions about purchasing SIDRA INTERSECTION.



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VOLUMES is an Excel application for SIDRA INTERSECTION 8 which allows specification of Volumes and related data within the Excel file, and processes a selected Site in a SIDRA INTERSECTION Project using data given in the Project file or in the Excel file, providing Volume Output, Intersection Output, Movement Output, Lane Output and Pedestrian Output data in Excel sheets. This has been developed in conjunction with SIDRA INTERSECTION API to provide additional capabilities for SIDRA INTERSECTION users. 

Visit the VOLUMES page on our support site to download .zip files containing the VOLUMES Excel Utility for SIDRA INTERSECTION 8 and various Sample Project files for use with this application.

Please refer to the SIDRA INTERSECTION User Guide for information on the use of this utility. A video tutorial is available here.


Recent Testimonials

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"SIDRA INTERSECTION is a very powerful and useful tool for experienced traffic engineers. Its reputation is often tarnished when not used correctly, i.e. when a calibrated base model reflecting current observations is not created. It is user friendly for experienced traffic engineers, especially with reference to the detailed manuals provided. Unfortunately, in large organisations, SIDRA modelling is often assigned to graduates with little knowledge or experience on real life observations and traffic behaviour. The three 'C's to successfull modelling are "Calibrate" "Calibrate" and "Calibrate"."
David Wilkins / i3 consultants WA

"I have used SIDRA in USA, Asia and Australia for 20 years. It has continually improved and over the past six years I have found it extremely useful for analysis of roundabouts in California, Arizona, Oregon and Washington. It is quick and easy to use accurately and my clients respect the results."
Kevin Fehon / DKS Associates

"A great tool to enable students to undertake project work on live intersections as part of the academic syllabus"
Tom Mckune / Durban University of Technology

"I have been using SIDRA for the past 8 years and found all versions are intuitive and the output are very useful and concise for reporting."
Robert Kwok / Worley Parsons

"SIDRA is still our standard for roundabout analysis because of its solid basis in gap acceptance theory that has shown to be more reliable in the USA than empirical models based in other countries."
James Dunlop / NCDOT

"I have found SIDRA INTERSECTION to be a very reliable, versatile and effective tool for analysing intersection performance. The ability to calibrate the model to accurately represent existing intersection characteristics has been of significant benefit for both intersection design and future planning purposes."
Rob Day / RTA (NSW)

Who's using our software?
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