Solve complex network design challenges using the unique lane-based SIDRA model

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what is SIDRA intersection


Micro-analytical software used as an aid for the design and evaluation of single intersections and networks of intersections.

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What's New in SI-9

Powerful new features to help you design intersections and networks with ease

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SIDRA Model Summary

Read a summary of SI-9's powerful SIDRA Model features that allows all intersection types – signals, roundabouts, sign control and pedestrian crossings in one network.

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SIDRA complements the Highway Capacity Manual (HCM) as a lane-based intersection and network analysis tool. Unlike other software packages, the SIDRA HCM Setup does not claim to be a simple replication of the HCM procedures. Instead, it offers various extensions on the capabilities HCM offers.

Lane based network model

Diverse Movement Classes

Movement Classes can be allocated to different lanes, lane segments and signal phases, providing a unique method for modelling of Bus Priority Lanes, Bicycle Lanes, and so on.

Powerful new features in SI-9

SIDRA for Environmental Analysis

Environmental assessment in traffic management, design, operations and planning can be conducted using models to estimate fuel consumption and pollutant emissions as a function of traffic conditions.

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Intersections and Networks

SIDRA INTERSECTION 9 is a powerful tool for lane-by-lane analysis of simple intersections to complex networks of up to 50 Sites!

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Best roundabout design using powerful analytical modelling

SIDRA INTERSECTION is the most advanced software for roundabouts and Version 9 includes many new powerful model features.


Signal timings from simple to complex signal phasings

Signal timing analysis methods in SIDRA INTERSECTION cover an extensive area of application and is based on strong research foundations.


SIDRA Queue Length and Saturation Flow Surveys

Improve the quality of your model calibration



Easily set up complex configurations using Site and Network Templates

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Tutorial Videos

Watch our series of tutorial videos for SIDRA INTERSECTION

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User Interface and Output

Learn about SI-9 user interface workflow and output capabilities

Most widely used software USA


SIDRA API provides a programming interface that enables external applications to communicate with SIDRA INTERSECTION to achieve more.


Transport and Traffic Modelling for Project Managers

This second edition of the critical review of the Austroads Report AP-R621-20 (revised version published as AP-R647-21) should be of interest to transport and traffic modelling project managers, guide developers and software users.

SIDRA INTERSECTION 9.0.3 Update has been released. Learn more.