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Version 10

All updates to SIDRA INTERSECTION 10, starting with the most recent release.

Version 10.0.9.250

Release Date: 9 February 2026

This is the latest release of SIDRA INTERSECTION 10.

Enhancements
  • Improvement to Proxy Server authentication when using a Floating Licence.
  • Arterial Segments and Freeway Segments between signalised Sites are now included in platoon modelling.
  • A new error check has been introduced to ensure that a user-given phase time is greater than the phase intergreen time. This prevents possible processing errors that had been reported in some cases where this condition had not been met.
  • Improved modelling of shared lanes on an approach with stop or give way control where one of the movements in the lane has no opposing flow.
  • Enhancements have been made to the handling of the Detailed Output so that Version 10 will work properly with output from future SIDRA versions.
  • File saving in the SIDRA API has been improved and specification of the full file path is no longer required.
  • Improvements to User Guide and Help.
Bug Fixes
  • A problem with calculation of Percent Arriving During Green and Progression Factors in some Networks has been fixed. This may have led to overly optimistic or pessimistic results for the affected Sites and possible effects on upstream lane blockages.
  • An unusual case where a Route went through the same Site more than once may have caused a program crash.
  • Incorrect high values of queue estimates were given for roundabouts when the HCM Delay Formula option was selected.
  • A calculation error related to problems with effective green time calculations has been fixed.
  • In some cases at signalised intersections where movements in a shared lane do not run at the same time, the movement effective green time before being blocked was overestimated.
  • The Layout Display did not match the specified lane disciplines in an unusual case with User Movement Classes.
  • Output parameter values were not being shown in Network Approach Displays.
  • "Program" setting for Minor Phase Actuation was not being shown in the Site Input Report and Input Comparison.
  • Volume totals shown in the Input Volumes Display Summary Table were not correct.
  • Fixed the precision of volume calculations in Site Volume Bins.
  • The Quick Input feature in the Network Demand and Sensitivity dialog was incorrectly applying settings to All Networks in All Folders when "All Networks in Current Folder" was selected.
  • Fixed an issue where output reports would freeze if the display scale was changed on one monitor in a multi-monitor system while SIDRA INTERSECTION was open.
  • The Network Approach Distance display did not update correctly when Site positions were changed using Modify Network.
  • Fixed an incorrect description of the queue selection in the User Setup dialog.

Version 10.0.8.241

Release Date: 12 November 2025

Bug Fixes
  • An error with saving project files to network drives in some network configurations has been fixed.
  • Some errors related to effective green time calculation at signals have been fixed.
  • The units in the Annual Values table of the Project Summary report have been corrected.

Version 10.0.6.236

Release Date: 24 September 2025

Enhancements
  • The Late Binding DLL which is required for some API applications is now available.
  • Site Volume Bin and Site Scenario data have now been included in the API. Some other enhancements have also been made to the API.
  • Improved the speed of opening dialogs in large projects.
  • Improved scaling and position of dialogs.
  • Site ID has been added in the CCG Phasing Display.
  • Improvements have been made to the reporting of coordination parameters in the Site Signal Coordination report.
  • Second-by-second platoon modelling is now applied to Arterial and Freeway Segment Sites.
  • Significant improvements have been made to Movement Timing Data in the Timing Analysis Report. Late Start, Early Cutoff and Red Arrow Dropoff are now shown as values in seconds. Reporting of Turn on Red status has been fixed.
  • The Embedded Browser Component used in Floating Licensing has been updated to a later version to enhance security.
  • A facility to change graphics rendering has been introduced to resolve graphics errors on some computers with ARM processors, particularly when running with Display Scaling greater than 100%.
  • Lane Changes are now shown regardless of any differences between upstream and downstream flow values.
  • Timing outputs for Roundabout Metering are now calculated and reported as real number values.
  • For Roundabout Metering cases, all short lanes on the Metered leg are now treated as being controlled by the metering signals.
  • Improved the format of the Actuated Signal Information table in the Detailed Output to allow for more than two green periods.
  • Changes to leg geometry are blocked if a Site has any links to Volume Bins.
  • Site and Network rotation functions are disabled if a Site has any links to Volume Bins.
  • User Report Template and Category files are now supported for export and import. Provision for importing these files from Version 9.1 has also been added.
  • Compatibility features for future version project files (e.g. SIDRA Version 11) have been included.
  • Pedestrian sections in the Input Report and Input Comparison have been removed for Site types that do not allow pedestrians, i.e. AWSC, Freeway and Arterial Segments.
  • Various minor improvements to formatting of output reports and displays.
  • SIDRA INTERSECTION installer improved so that an internet connection is not required during installation of the software.
  • Various improvements to Layout pictures.
  • Various minor improvements to dialogs.
  • Improvements to User Guide and Help.
Bug Fixes
  • Fixed some errors in calculation of average travel speed by Movement Class. Also corrected the impact of Extra Midblock Delay on travel time and travel speed in some outputs.
  • Extra Bunching was not being correctly applied on some roundabout entries.
  • Fixed an error with calculation of Lane Changes in cases where there were Midblock Inflows or Outflows.
  • Fixed a problem that caused underestimation of capacity reduction due to queues overflowing from short lanes in some cases.
  • Fixed some cases where non-integer phase times summed to the Network Cycle Time but were not applied in Network analysis.
  • The error check which disallows user-given phase times with variable phasing was not working. This condition led to a program crash and the error check has been reinstated.
  • Saturation flows for some cases of slip lanes with multiple green periods were not allocated to the correct green period. This led to incorrect capacity estimation for these lanes.
  • Lane Width adjustment to saturation flow for low angle slip/bypass lanes was not working.
  • The Apply Saturation Flow Estimation parameter was blocked for Freeway and Arterial Segment Site Types. It has now been made available. Clarification of the estimation method has been included in the User Guide.
  • Controlling Approach Saturation Flow Rate for the red period was missing in the Roundabout Metering Report.
  • Pedestrian Analysis report is now blocked if there are no pedestrians at a roundabout or sign-controlled Site. Errors relating to opening a report when only one stage exists on a roundabout leg have been fixed.
  • Fixed an error in reported movement delay values for AWSC Sites when the HCM Delay Model option was used.
  • Fixed a problem with entering Site coordinates in SIDRA Maps when the Windows Region was set for some countries that use comma as the decimal separator.
  • When a new Route was created, the Sites in the Route did not appear immediately in the list under SITES ON ROUTE.
  • Route Selection in the Project Pane was lost when the Route Time-Distance display was opened.
  • Site/CCG ID was not shown correctly in Network Input Comparison.
  • Fixed a User Interface error related to empty folders in Site Volume Bins.
  • Various Network Site Reports and Displays were blocked when a Route was selected. These are now available to view in all cases.
  • In some Network Analysis cases, queue-related footnotes were missing from the Movement Summary reports.
  • Fixed some cases of missing signal timing bars in Movement Timing Displays.
  • The Lane Geometry dialog had a bug that prevented changing Lane Control from Continuous to Give Way.
  • In some cases, SIDRA INTERSECTION project files could not be opened from shared network folders.
  • Merging of two Networks which both had CCGs was not set up correctly and led to errors in the Define CCGs dialog for the merged Network.
  • Fixed an error that occurred when viewing output reports belonging to a merged Network.
  • Fixed an error that occurred when printing a Site Layout picture via the button in Print-Preview.
  • The Site icon displayed for Arterial Segment Sites in the Movement Displays was incorrect.
  • The non-functional right-click popup menu for a Site in the Site List in the Network Configuration dialog has been removed.
  • Fixed an error that occurred when right-clicking on an Input Report.
  • The function "Select Site (Deselect Others)" in the right-click menu when clicking on a Site in the Network Layout is now disabled unless the Layout corresponds to the currently selected Network and only one Network is selected in the Network list in the Project Pane.

Version 10.0.5.217

Release Date: 17 April 2025

Bug Fixes
  • A bug that led to a user interface error when opening the Volumes dialog for All-Way Stop Control, Arterial Segment and Freeway Basic Segment Sites has been fixed.

Version 10.0.4.216

Release Date: 14 April 2025

Enhancements
  • Improvements to Timing Analysis Report. This includes reformatting of the Phase Data (Input) table, and consistent use of the letter "Y" rather than the word "Yes".
  • When a Floating Licence is being used, the duration for which a licence seat can be taken offline can now be chosen for periods up to 30 days.
  • Selection of comma as a decimal separator now applies to legends in various displays.
  • The User Interface will now impose a limit of 20 Routes in a Network to avoid potential problems with Network Processing.
  • In the Roundabouts dialog, a leg can now be selected by clicking in the in-dialog Layout display.
  • Improvements have been made to several Network Template layout pictures.
  • The default Model Level for Floating Licences has been changed to Network. This will assist with software deployment for larger users.
  • Unique ID checks are no longer case sensitive, e.g. 2a and 2A will be considered to be duplicate IDs.
  • Improvements to User Guide and Help.
Bug Fixes
  • A bug related to opening Project Files from a shared folder on a network server has been fixed.
  • Some values of Average Speed for both Sites and Networks were incorrectly calculated as higher than they should have been, particularly in congested cases. This affected reported speeds and Network Level of Service.
  • Incorrect values were reported for some components of delay in the Detailed Output – Lane Delays table.
  • A negative value of Movement Travel Time could be reported in rare cases for signalised Sites.
  • The TOR column in the Movement Timing Information table in the Timing Analysis Report was not indicating the Turn On Red periods correctly. The column has been removed and will be reinstated in a future update. The Turn On Red model calculations are not affected.
  • In the Movement Signal Timing display, when the Displayed Movement Times option was used, some timing bars were displayed incorrectly or did not display at all.
  • Fixed some bugs related to selection of Scenarios in the Site Scenarios and Network Scenarios dialogs.
  • When Sites, Networks or Routes were moved within the list in the Project Pane using ribbon commands or drag and drop, it was possible to close the Project File without being prompted to Save. This potentially led to loss of the changes.
  • Fixed an error that occurred when a dialog was moved to an unusual position on the screen.
  • Fixed some problems with the Import Initial Demand dialog for Network Sites.
  • In some cases, the "Results For" option was not available in the Network Demand & Sensitivity dialog.
  • A Movement Class label was missing from the Quick Input dialog for Volume Bins.
  • Movements Running in Phase were incorrectly reported in the Network Input Report for Common Control Group cases.
  • Volume Bins were not allowing zero value for pedestrian volumes.
  • Error related to importing of Site volume for a disabled Diagonal Pedestrian movement into a Volume Bin has been fixed.
  • In a multiple sequence analysis case where sequences had different cycle time options, sometimes the wrong cycle time was chosen for creation of results for the selected sequence.
  • Fixed some cases of incorrect ordering of rows in the Project Summary Report when rows were sorted by Site ID.
  • Fixed a problem where dialogs disappeared from the visible screen area when certain resolutions were used or resolution was changed.
  • Fixed an installation problem related to running of unsigned PowerShell scripts on computers where group policy did not allow this.

Version 10.0.3.210

Release Date: 19 March 2025

This is the first release of SIDRA INTERSECTION 10. The new features of this version available in the first release are listed below.

SIDRA INTERSECTION 10 introduces major traffic model and user interface improvements, and several new functionalities.

This is the 25th major SIDRA version since its first release.

Features and Enhancements

Versionless Project File (sipx)

New Project file format with file extension sipx developed as a compressed JSON (JavaScript Object Notation) datastore file. Prepared as a versionless Project file for compatibility between future versions. The new sipx file format offers smaller file size, and quicker processing and file saving times. Use File - Open to convert individual Project files to the new format. Use File - Batch Convert for converting old version Project files (SIP9 only, see Project File Format) to the current (SIPX). This process can take a long time depending on the number of files.

Volume Store

Volume Bins for separate input of Site Volumes and Network O-D Volumes in the Project as a new way to manage SIDRA volume data for Sites (individually and in Networks) and for ASSIGN enabling efficient volume scenario analysis.

Scenario Analysis

Site, Network and Assign Volume Scenarios specified in the Site Scenarios, Network Scenarios and Assign Scenarios dialogs are used for a much-reduced number of Sites and Networks using the Volume Store.

SIDRA MAPS

Uses OpenStreetMap with Site coordinates.

  • MAP VIEW for viewing and accessing Sites and Networks on the map.
  • Map Extract for creating new Sites to be added in the current Project.

New Site Types

The following new Site Types have been introduced for enhanced Site and Network analysis capability:

  • Turbo Roundabout
    • The Turbo Island parameter included in the Roundabout dialog is accessible when the Site Type is Turbo Roundabout.
  • Arterial Segment
  • Freeway Basic Segment
  • Freeway Segment with Ramps.

These can be added to the Project as New Sites using the Commands under the Site - Setup tab.

Signal Timing Analysis

The signal timing analysis enhancements include the following.

  • Signal timing input and output as real numbers. This allows the specification of all signal timing input parameters including Yellow Time and All-Red Time values as real numbers.
  • Multiple green periods with an increased number of green periods per movement (this was limited to two in previous versions). Useful for repeat phasing, double and triple cycling, Turn On Red, protected - permitted control (green arrow and opposed turn), conditional phasing (buses and trams).
  • New performance models developed for an increased number of green periods.
  • New capacity model for unsignalised Slip/Bypass lanes under Give-Way/ Yield sign control with multiple green periods.
  • Early Cut-Off and Late Start parameters moved to the Phasing & Timing dialog to enable phase-specific application.
  • Enhanced critical movement analysis method

Model Enhancements

Model enhancements in SIDRA INTERSECTION 10 include the following.

  • Exit Merge Queue Model.
  • Exit short lane default for Merge Type changed from Priority Merge to Zipper Merge.
  • Percentile Queue Output for Excess Back of Queues.
  • Pedestrian Crossings on continuous lanes at intersections.
  • New performance models to estimate delay, queue length, stops, etc. for multiple green periods (treated as subcycles with residual queues) as needed for more than two green periods at signalised intersections.
  • New capacity model for unsignalised Slip/Bypass lanes under give-way / yield sign control with varying queue discharge conditions at signalised intersections.
  • Variable Demand Modelling for Networks made easier by allowing a function to import Residual Queued Demand values for Networks.

User Interface

Extensive enhancements for more efficient workflow.

  • Ribbon with two rows of tabs.
  • Improved icons.
  • Display Pane enhancements to improve how multiple tabbed displays of text and graphical output are accessed including Display Tab Search facility.
  • Drag and Drop action to move items in the Project panes and Site and Common Control Group Phasing & Timing dialogs.
  • Network Inputs displays in the Network Setup ribbon for inspecting a large number of Network input parameters.
  • Importing Residual Queued Demand values for Networks in Variable Demand Modelling of multiple Flow (Analysis) Periods.
  • Improved Site Template and Network Template dialogs.
  • Unique IDs (for Site, Network, Route, CCG, Bin and Scenario IDs).
  • Upstream Lane Width and Slip Lane Width.
  • Merge Networks function.
  • Site Approach Output Order options.
  • Various output restrictions for Educational licences removed.

VOLUMES Excel Utility

  • Updated API application VOLUMES Excel including facility to Import Volumes from external sources (VicRoads and Matrix volume data spreadsheets).