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What’s OnOnline programs and in-person workshops, with CPD/PDH hoursIntroduction to SIDRASIDRA Model FundamentalsSIDRA for Project Managers & ReviewersSIDRA ASSIGNIn-person workshopsCPD and PDH recognitionExternal training partnersSIDRA RepresentativesTraining runs on sidraintersection.com
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Publications178 papers and reports, 1975 to 2026What is good about analytical traffic modelling?Why do we call SIDRA micro-analytical?Modelling for project managersAll SIDRA Model articlesBlog and NewsVideosSubscribe to SIDRA NEWSSIDRA Glossary
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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.

Explore SIDRA INTERSECTIONAbout us

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.

See What’s OnCPD and PDH

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.

What’s new in 11.0.4How to update

Browse 178 papers and reports, 1975 to 2026. Search by title, author or topic and download the publications.

Explore the archiveBlog and News
Melbourne, Australia

SIDRA INTERSECTION 11

Lane-based micro-analytical traffic modelling software, used in over 70 countries.

Our company
Wed 11 to Fri 13 NovFrom 10:00 am AEDT

SIDRA Model Fundamentals

Online · 3 days · 9 hrs CPD/PDH

A$1,386per attendee, inc. GST
RegisterProgram details
Released 22 Oct 2026

12 enhancements and 16 bug fixes

Update from inside the software: FILE Tab > Software Info > Check for Updates.

Read the release notes
1975 to 2026

178 papers and reports

Search by title, author or topic, and download the publications.

Publications
02 / Products

Products

Flagship

SIDRA INTERSECTION 11

Lane-based micro-analytical traffic modelling software, used by transport engineers, traffic planners and road authorities in over 70 countries.

sidraintersection.com →Included in 11

SIDRA ASSIGN

Unique micro-analytical traffic assignment functionality integrated with the detailed lane-based multi-modal Network model provided in the SIDRA INTERSECTION software.

SIDRA ASSIGN →For developers

SIDRA API (opens api.sidrasolutions.com)

Drive the software from your own code.

api.sidrasolutions.com ↗
03 / Latest

Blog and News

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SIDRA NEWS

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04 / Research

Explore the research

All 178 publications →
The re-distributional Effects of an area Traffic Control Policy (1975)Route Control of Traffic in Urban Road Networks: Review and Principles (1976)Route Control-Simulation Experiments (1976)X and Y in Traffic Signal Design (1978)A Graphical Explanation of the two Principles and two Techniques of Traffic Assignment (1979)Stops at Traffic Signals (1980)Time-Dependent Expressions for Delay, Stop Rate and Queue Length at Traffic Signals (1980)Fuel Efficiency and other objectives in Traffic System Management (1981)Traffic Signals: Capacity and Timing Analysis (1981)A Hierarchy of Vehicle Fuel Consumption Models (1983)Appraisal of Eight Small Area Traffic Management Tools (1983)Progress in Fuel Consumption Modelling for Urban Traffic Management (1983)SIDRA-2 does it Lane by Lane (1984)A Discussion on The Paper on Fuel Consumption Modelling by Post Et Al (1985)An Interpretation of the Parameters in the Simple Average Travel Speed Model of Fuel Consumption (1985)Guide to Fuel Consumption Analysis for Urban Traffic Management (1985)An Energy-Related Model of Instantaneous Fuel Consumption (1986)Estimation of Car Fuel Consumption in Urban Traffic (1986)Fuel Consumption Analyses for Urban Traffic Management (1986)Models for Estimation of Car Fuel Consumption in Urban Traffic (1986)Acceleration Profile Models for Vehicles in Road Traffic (1987)Estimating Effect of Vehicle Characteristics on Fuel Consumption (1987)Capacity of a Shared Lane (1988)Opposed Turns at Signalised Intersections: The Australian Method (1988)The Highway Capacity Manual delay formula for Signalised Intersections (1988)Efficiency and Drag in the Power-Based Model of Fuel Consumption (1989)On the Estimation of Lane Flows for Intersection Analysis (1989)Comments on the Application of Queueing Theory to Delays at Signals (1990)Green Splits with Priority to Selected Movements (1990)SIDRA for the Highway Capacity Manual (1990)Akçelik's_Travel_Function_(for 1991 paper)_v1.xls (1991)Implementations of the Australian Roundabout Analysis Method in SIDRA (1991)Travel Time Functions for Transport Planning Purposes: Davidson's Function, its Time-Dependent form and an Alternative Travel Time Function (1991)Comparison of Roundabout Capacity and Delay Estimates from Analytical and Simulation Models (1992)Oversaturation Delay Estimates with Consideration of Peaking (1992)The Effect of Heavy Vehicles on Saturation Flow at Signalised Intersections (1992)Estimation of Delays at Traffic Signals for Variable Demand Conditions (1993)Overflow Delay at a Signalized Intersection Approach Influenced by an Upstream Signal: An Analytical Investigation (1993)Calibration of the Bunched Exponential Distribution of Arrival Headways (1994)Estimation of Green Times and Cycle Time for Vehicle-Actuated Signals (1994)Gap Acceptance Modelling by Traffic Signal Analogy (1994)Overflow Delay Estimation for a Simple Intersection with Fully Actuated Signal Control (1994)Overflow Queues and Delays with Random and Platooned Arrivals at Signalized Intersections (1994)Recalibrating SIDRA's Saturation Flow Estimation Models (1994)Route Choice and Signal Control: The Potential for Integrated Route Guidance (1994)Traffic Performance Models for Unsignalised Intersections and Fixed-Time Signals (1994)Not "the greatest new development in traffic engineering since the traffic signal" (1995)Signal Timing Analysis for Vehicle-Actuated Control (1995)Signal Timing Calculation Methods for Vehicle-Actuated and Fixed-Time Signals (1995)ARCADY Health Warning: Account for Unequal Lane Usage or Risk Damaging the Public Purse! (1996)Developing a set of Fuel Consumption and Emissions Models for use in Traffic Network Modelling (1996)Performance of Roundabouts under Heavy Demand Conditions (1996)Progression Factor for Queue Length and Other Queue-Related Statistics (1996)Relating Flow, Density, Speed and Travel Time Models for Uninterrupted and Interrupted Traffic (1996)Analysis of Roundabout Performance by Modelling Approach Flow Interactions (1997)Fundamental Traffic Variables in Adaptive Control and the SCATS DS Parameter (1997)Lane-By-Lane Modelling of Unequal Lane use and Flares at Roundabouts and Signalised Intersections: The SIDRA Solution (1997)Recent Research on Actuated Signal Timing and Performance Evaluation and its Application in SIDRA 5 (1997)Three-Laning a Two-Lane Roundabout - The Outcomes (1997)A Comparison of Three Delay Models for Sign-Controlled Intersections and Roundabouts (1998)An evaluation of SCATS Master Isolated control (1998)Modern Roundabout Practice in the United States (1998)Roundabout Capacity and Performance (1998)Fundamental Relationships for Freeway Traffic Flows (1999)Fundamental Relationships for Traffic Flows at Signalised Intersections (1999)Traffic Management Performance - Development of the Traffic Frustration Index (1999)Field Assessment of the Performance of Computer-Based Signal Timing Models at Individual Intersections in North Carolina (2000)On the Validity of Some Traffic Engineering Folklore (2000)Incident Detection by Fractal Dimension Analysis of Loop Detector Data (2000)Acceleration and Deceleration Models (2001)An Investigation of Pedestrian Movement Characteristics at Mid-Block Signalised Crossings (2001)Evaluation of Roundabout Performance using SIDRA (2001)HCM 2000 Back of Queue Model for Signalised Intersections (2001)Microsimulation and Analytical Methods for Modelling Urban Traffic (2001)Pedestrian Movement Characteristics at Signalised Intersections (2001)Progression Factors in the HCM 2000 Queue and Delay Models for Traffic Signals (2001)Establishing Roundabout Guidelines for a State DOT (2002)Estimating Negotiation Radius, Distance and Speed for Vehicles using Roundabouts (2002)Queue Discharge Flow and Speed Models for Signalised Intersections (2002)Roundabout Studies in Kansas (2002)Speed - Flow Models for Uninterrupted Traffic Facilities (2002)A GPS Study of Car Following Theory (2002)The Validity of Driving Simulator to Measure On-Road Driving Performance of Older Drivers (2002)Evaluation of Toll Collection Performance Using Traffic Simulation (2002)A Roundabout Case Study Comparing Capacity Estimates from Alternative Analytical Models (2003)Operating Cost, Fuel Consumption, and Emission Models in aaSIDRA and aaMotion (2003)Speed - Flow and Bunching Relationships for Uninterrupted Flows (2003)Improving Utilisation of Existing Public Transport Infrastructure by Allowing Bus Access to Tram Rights-Of-Way (2003)Mobility Considerations in Restricting Choice Sets in Modal Choice Models (2003)Comparison of Delay Estimates at Under-Saturated and Over-Saturated Pre-Timed Signalized Intersections (2004)Differences between the AUSTROADS Roundabout Guide and aaSIDRA Roundabout Analysis Methods (2004)Roundabouts with Unbalanced Flow Patterns (2004)Stops & Goes of Traffic Signals (2004)Using The Six Principles Of Persuasion To Promote Travel Behavior Change - Preliminary Findings Of A Travelsmart Pilot Test (2004)Examining Travel Time Variability Using AVI Data (2004)Capacity and Performance Analysis of Roundabout Metering Signals (2005)Roundabout Model Calibration Issues and a Case Study (2005)Roundabouts with Metering Signals (2005)Management of Competing Demands On Urban Freight Corridors (2005)Operating Cost, Fuel Consumption and Pollutant Emission Savings at a Roundabout with METERING SIGNALS (2006)Speed - Flow and Bunching Models for Uninterrupted Flows (2006)The Freight Capacity Model: A tool for exploring the future of road freight and its impact on the Environment (2006)A Review of Gap-Acceptance Capacity Models (2007)Microsimulation and Analytical Models for Traffic Engineering (2007)An Investigation of the Performance of Roundabouts with Metering Signals (2008)Roundabouts in Australia (2008)Speed Control at Roundabouts - use of Maximum Entry Path Radii (2008)The Relationship between Capacity and Driver Behaviour (2008)Variable User Charging: Experiences and Extensions in a World of Carbon Emissions (2008)Evaluating Roundabout Capacity, Level of Service and Performance (2009)Active Transport Journey Planner Methodology (2009)Guidelines for Selecting Techniques for the Modelling of Road Network Operations (2010)An assessment of the Highway Capacity Manual 2010 roundabout capacity model (2011)Analysis of Single-Lane Roundabout Slip Lanes using SIDRA (2011)Measuring Traffic Congestion (2011)ROUNDABOUTS - Comments on the SIDRA INTERSECTION Model and the TRL (UK) Linear Regression Model (2011)Roundabout Design and Capacity Analysis in Australia and New Zealand (2011)Roundabout Metering Signals: Capacity, Performance and Timing (2011)Some Common and Differing Aspects of Alternative Models for Roundabout Capacity and Performance Estimation (2011)An Improved Method for Estimating Sign-Controlled Intersection Capacity (2012)Calibrating Fuel Consumption and Emission Models for Modern Vehicles (2012)Issues in Performance Assessment of Sign-Controlled Intersections (2012)Lane-Based Micro-Analytical Model of a Roundabout Corridor (2013)A New Lane-Based Model for Platooned Patterns at Closely-Spaced Signalised Intersections (2014)Analysis of Fuel Consumption and Emissions at Roundabout with Slip Lane, using SIDRA and Validation by MOVES Simulation (2014)Measuring and Assessing Traffic Congestion: A Case Study (2014)Modelling Queue Spillback and Nearby Signal Effects in a Roundabout Corridor (2014)Recalibration of a vehicle power model for fuel and emission estimation and its effect on assessment of alternative intersection treatments (2014)A Feasibility Study into the use of String Transport Systems for Passenger Rail in New South Wales (2014)The Implications of Volatility in Day-to-Day Travel Flow and Road Capacity on Traffic Network Design Projects (2015)Alternative Intersection Analysis Using SIDRA INTERSECTION (2015)Development of Network Signal Timing Methodology in SIDRA INTERSECTION (2015)Improvement of the West road corridor for accessing to the New Hospital of Lucca (Italy) (2015)Modelling Signal Platoon Patterns by Approach Lane use and Movement Class (2015)Roundabouts in Australia: the state of the art on models and applications (2015)Signal Platoon Patterns by Approach Lane use and Movement Class (2015)Departure Side Platforms: a road congestion mitigation measure (2015)Strategic Traffic Assignment: Models and Applications to Capture Day-to-Day Flow Volatility (2015)How reliable is the Bluetooth-based origin-destination data (2016)Comparing Lane Based and Lane-Group Based Models of Signalised Intersection Networks (2016)Recent Innovations and Applications in SIDRA INTERSECTION: Lane-Based Network Model (2016)Modelling Disrupted Transport Network Behaviour (2016)Impact of Information on Risk Attitudes: Implications on Valuation of Reliability and Information (2016)Analytical and simulation approaches to understand combined effects of transit signal priority and road-space priority measures (2017)Establishing Trust Between Fully-Connected Autonomous Vehicles (2017)A Comparison of Two Roundabout Capacity Models (2017)An Assessment of the Highway Capacity Manual Edition 6 Roundabout Capacity Model (2017)Roundabout Model Comparison Table (2017)Roundabouts Lessons Learned (2017)Traffic models in the era of big data (2017)Does Combining Transit Signal Priority with Dedicated Bus Lanes or Queue Jump Lanes at Multiple Intersections Create Multiplier Effects? (2017)Comparing Common Control Group treatment and signal coordination of intersections with separate controllers (2018)Gap Acceptance Cycles for Modelling Roundabout Capacity and Performance (2018)Modelling the Net Traffic Congestion Impact of Bus Operations in Melbourne (2018)Are Models becoming smarter than Modellers? (2019)Costing Traffic Congestion (2019)Comparing Roundabout and Metered Roundabout Performance under Different Traffic Conditions (2019)Optimal Vehicle Trajectory Planning With Control Constraints and Recursive Implementation for Automated On-Ramp Merging (2019)Transport modelling for project managers - a critique of Austroads Report AP-R621-20 (2020)Management of Traffic Modelling - A critique of Austroads Report AP-R621-20, 2nd Edition. (2021)Calibration and Validation of a Volume-Delay Function Using a Genetic Algorithm (2021)A bivariate extreme value model for estimating crash frequency by severity using traffic conflicts (2021)How many are enough?: Investigating the effectiveness of multiple conflict indicators for crash frequency-by-severity estimation by automated traffic conflict analysis (2021)HCM 6 Extended Roundabout Capacity Model in SIDRA INTERSECTION (2022)Searching for a Gap Acceptance Theory Basis for Linear Capacity Models (2022)A Comparative Analysis of Exponential and Linear Roundabout Capacity Models Using HCM Research Data (2022)Intersection Level of Service and Performance Discrepancies (2022)Network Analysis under Variable Demand Conditions - The SIDRA Method (2023)What is good about analytical traffic modelling? (2023)Use of SCATS MF to Calibrate SIDRA Saturation Flow (2023)SIDRA Multimodal Capacity and Performance Analysis for Roundabouts (2024)Traffic modeling: micro-analytical meets micro-simulation (2024)SIDRA Model Extensions for the Highway Capacity Manual (2025)A New Roundabout Capacity Survey Method (2025)New Survey Method for Calibration of Roundabout Capacity Models (2025)A Roundabout Capacity Survey Method Using Gap Acceptance Cycles and Vehicle Trajectory Data (2025)SIDRA Roundabout Presentation - TORUS Webinar Nov 2025 (2025)SIDRA Glossary of Road Traffic Analysis Terms (2026)1981Traffic Signals: Capacity and Timing Analysis1990SIDRA for the Highway Capacity Manual1997Lane-By-Lane Modelling of Unequal Lane use and Flares at Roundabouts and Signalised Intersections: The SIDRA Solution2018Gap Acceptance Cycles for Modelling Roundabout Capacity and Performance2026SIDRA Glossary of Road Traffic Analysis Terms
The modelling behind SIDRAWhat is good about analytical traffic modelling?7 minWhy do we call SIDRA micro-analytical?1 minTransport and Traffic Modelling for Project Managers2 minAll articles →
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