TRANSYT Version History

Signal Design for Network and Junctions

TRANSYT is a macroscopic software package for designing, evaluating and modelling everything from single isolated road junctions to large mixed signal-controlled and priority control traffic networks.

Area Change
MODEL Enhancement: Unsignalled (Zebra) crossing modelling in Simulation Mode
MODEL Enhancement: Reconfigurable Traffic Types facilitate the modelling of cyclists within dedicated cycle lanes, such as at CYCLOPS junctions
MODEL Enhancement: Allows continuation of the same stage with two or more adjacent intermittent stages
UI Enhancement: ‘Composite’ demand sets upgraded to allow more complex relationships to be defined (Matching Junctions 10’s ‘relationship’ system.)
UI Enhancement: Demand Set referencing of user-defined Growth Factors
UI Enhancement: SAVED files now added to “Recent files” list
UI Enhancement: keyboard shortcuts added for previous/next analysis/demand set / time segment
UI Enhancement: Minor improvements to 3-D network diagram, e.g. vehicle height
LICENSING Enhancement: Greater tolerance of temp internet losses  
REPORTING Vector diagrams replaced with high-quality bitmaps, offering improved quality of PDF reports and more control over the resolution of report images
RESULTS Fix: Demand dependency: Controller “percentage of skipped stages” reported correctly
RESULTS Fix: In simulation mode, pedestrian results correctly blanked out
UI Fix: Right-click diagram menu now reliably showing options to add to collection 
UI Fix: Phase Timing Diagram – Phase order now consistently matches Data Outline
USER GUIDE Revised Main User Guide (Issue J):

  • Changed to reflect the product functionality enhancements associated with this release
Area Change
LICENSING Command-line interface (TRANSYT CLI) is now licensable via TRL’s cloud-based licensing system
SECURITY Enhancement: Login requirement relaxed to every 21 days, instead of every 7 days
MODEL Enhancement: Stream-based green start/end adjustments can now be defined per Analysis Set
MODEL Enhancement: In Adaptive Mode, a delay period before ‘absent demand’ is triggered, is now user-definable
MODEL Fix: An issue with the very first VA stage green (being too long) is corrected
MODEL Fix: An issue with results, where there is a phase delay, implicit all-red option is selected and demand is low, is now fixed
UI Enhancement: Web links within the Newsfeeder text now open in default browser
UI Enhancement: Diagram now has an alternative panning method that does not rely on middle mouse button/wheel
RESULTS Fix: The effect of ‘Exclude blocking-back in DoS’ extended to include PDM traffic streams and links
USER GUIDE Revised Main User Guide (Issue H):

  • Changed to reflect minor changes associated with this release
Area Change
MODEL New: Ability to apply effective green time adjustments to individual traffic streams and links so that, for example, you can account for the under-utilisation of green time
MODEL New: Option to preserve the cycle time when stages are skipped
MODEL New: Option to redistribute relinquished green time (associated with skipped stages) to other stages
PORTAL Enhancement: Local administrators can now delete users via the TRL Software Portal
UI Enhancement: Simulation’s Signal Log is enhanced to show timings across all traffic streams when effective greens are shown, allowing local adjustments to green times to be seen
UI Fix: Double-cycling of a controller stream is now correctly banned when in Adaptive control mode
UI Fix: Diagram: Signals > “Show on links/streams” now applies only to signalised items
UI Fix: Allow intermittent occurrence of a stage is now correctly banned when in Adaptive control mode
UI Fix: Traffic Stream screen’s give-way conflict data now correctly displays conflict data for each movement
UI Fix: Up-to-date run status (red/green colouring) now fixed for a number of scenarios
RESULTS New: Optional alternative (TfL) calculation of DoS that excludes modelled blocking back effects, now available
RESULTS Fix: Adaptive Control: Mean phase duration calculation is corrected when phase runs in multiple stages
RESULTS Fix: Adaptive Control: Stage skipping interstage error fixed
REPORT Fix: Speed of generation of HTML reports restored
USER GUIDE Revised Main User Guide (Issue G):

  • Changed to reflect minor changes associated with this release, e.g. new sections added covering traffic stream effective green adjustments, how to preserve the cycle time when stages are skipped, and how to delete users via the TRL Software Portal.  A new section on how to deal with the effects of a poor internet connection, is also included
Area Change
MODEL New: Simulation model now allows the assessment of the performance of single junctions or junctions that are part of a wider network, that are controlled by basic adaptive signal control, such as the UK’s “System D”
UI Fix: Double-clicking on a network diagram item, opens the relevant screen and selects the chose item – Not the first
UI Fix: Controller Stream data:  stage probabilities” error no longer occurs. (Typically arising from the import of files created by older TRANSYT versions.)
UI Enhancement: Can now copy numeric data from X-Y (Analyser) graphs
UI Fix: OD grid pasting between Junctions 10 and TRANSYT 16 improved
UI Fix: Network Diagram: Right-click context menu for OD/WA matrices, no longer crashes
UI Fix: Network Diagram: Indication of Timing wheel landing zone now correct at all zoom levels, i.e. red highlighting no longer overlapping
UI Enhancement: Network Diagram: Increased range of the Lane width ‘adjustment slider’
USER GUIDE Revised Main User Guide (Issue F):

  • Changed to reflect minor changes associated with this release, e.g. added new section covering adaptive signal control, and updated several screencaptures to reflect modernisation of user interface
Area Change
LICENSING Organisation (company) name shown in both the TRL Software Portal and in the Licence Information screen within TRANSYT 16
UI/PORTAL Enhancement: From within TRANSYT 16, access to your cloud-based data files (stored within the TRL Software Portal)
UI/PORTAL Enhancement: From within TRANSYT 16, access to cloud-based ‘guest’ files that are shared with you by other organisations
UI Fix: Reduced chance of reports failing to save to your chosen location due to a long path length.  Additionally, a new ‘File Preference’ allows users to direct TRANSYT to save HTML reports to their ‘temp’ folder
UI Enhancement: Network diagram “Key” expanded to cover all data overlays
UI Blue file selector controls at the bottom of the screen now shows full filename in preference to attempting to show location too. Full path shown as a tooltip instead
UI Fix: Data Field Finder can now optionally show “Advanced” data items as well as being more reliable in what it shows
UI Fix: Top menu drop-downs now show more Demand Sets, Analysis sets and time segments without having to scroll
UI Fix: Several other small fixes have been implemented in this release
USER GUIDE Revised Main User Guide (Issue E):

  • Changed to reflect minor changes associated with this release, e.g. added references to the new access to cloud-based “guest” data files from within the main TRANSYT 16 application
Area Change
LICENCE Enhancement: Ability to lock licence to a device so that TRANSYT 16 can be used off-line (No internet)
LICENCE Enhancement: Improved tolerance of poor internet access: Licensing system tolerates short outages better
PORTAL Enhancement: The ability to offer either “read-only” or “contributor” access to files and folders within your file directory area. Facilitates close collaboration with clients
UI (Fix) Excel demand set source “offset” ignored when it is meant to be
UI (Fix) Timing wheel repositioning no longer linked to controller position
USER GUIDE TRL Software Portal’s User Guide updated to include full details of the new collaborative “guest access” facility
USER GUIDE Revised Main User Guide (Issue D):

  • Changed to reflect minor changes associated with this release, e.g.
  • Details of new “off-line use” facility added
  • Details of new “guest access” facility added 
Area Change
LICENCE Enhancement: New cloud-based user subscription licencing system – Licence follows you to where you are
LICENCE Enhancement: When using a cloud-based licence, TRANSYT automatically recognises cloud-based Junctions 10 licence
LICENCE Enhancement: When using a device-based (ERIS) licence, TRANSYT can be set to recognise a Junctions 10 ERIS licence
LICENCE Enhancement: ‘File Preference’ added to allow easy switching between the two licensing systems – CLOUD (user-based) and ERIS (device-based)
PORTAL Enhancement: Access to new TRL Software Portal, where you can collaborate (store and share files) and also access the latest version of TRANSYT 16 at any time
UI Enhancement: ‘Bulk Edit’ option for speeding up data-entry for very large intergreen/interstage matrices
UI Enhancement: Via the Help Menu, a link to the new TRL Software website “Ideas portal”
UI Some minor design modifications made, to match similar ones made in Junctions 10
UI Automatically deletes references to deleted phases (previously when a phase on a controller was deleted, the Stage Libraries retain the Phases)
UI(Fix) Results (Red/Green) Status: Now working properly for files that had different cycle time results (e.g. Minimum Possible Cycle Time) within each set
UI(Fix) ‘Run all stage permutations’ facility: Ranking of results now works correctly
MODEL Simulation modelling with PICADY two-lane minor give-way no longer banned
MODEL(Fix) Exclude in results calculation” option heeded correctly when in Simulation Mode
DOCS Updated EULA to include ‘fair use’ description for new user licence allocation
USER GUIDE Revised User Guide (Issue C):

  • New chapter covering new TRL Software Portal
  • Changes made to reflect new cloud-based licensing system
  • Changed to reflect minor changes associated with this release
Area Change
UI (Fix) Network Diagram OpenGL compatibility issue solved (often associated with newer laptops and with Intel(R) HD Graphics Card Renderer)
UI (Fix) New User preference “Use hardware acceleration” which can be used to fix rare issues with the display of the network diagram
UI (Fix) Network diagram options: Lane “width” option now working as intended
FILES Library Files now heed Audit Trail file preferences
UI (Fix) Difficultly seeing all Demand Sets in Main Data screen now fixed
UI Enhancements and Fixes: Simulation “Signals Log”:

  • Flow sampling now works for all movements – not just those producing a controlling flow
  • Now only need to reference a source traffic stream, rather than the movement (i.e. source and destination) in order to display queues
  • Simulation “Signals Log”: Stage IDs now displayed
FILES Sample and Library Files edited to take account for possible use in Simulation Mode by ensuring traffic stream lengths are consistent (Auto-length used throughout)
UI Demand Set names are interpreted better to avoid duplicate names – e.g. references in name to AM and PM now automatically copied into “time period name”
UI New checkbox at bottom of OD Matrix “Entry Flows” tab, to allow a view of all traffic types, irrespective of whether or not there are any paths associated with these traffic types. This gives access to remove flows when they are no longer needed
UI Network Diagram – Retention of connections between locations and traffic streams improved when using the “Move Lanes” facility to split or join traffic streams
UI (Fix) When pedestrian crossings, nodes or controller stream IDs are renamed, Collection references are updated too, i.e. synchronised
LICENCES Polling of network licence improved – Grace period added to allow you to save your file before connection is lost
USER GUIDE Revised User Guide (Issue B): Miscellaneous minor corrections and additions.

Please see the TRANSYT 16 Enhancements page for more details (with pictures) of some of the new features in TRANSYT16.

Enhancements include:

  • Simulation Mode, offers for the first time the following modelling capabilities…
    • non-cyclic scenarios, i.e. intermittent stages
    • blocking back effects
    • lane starvation
    • complex flares (short bays)
    • uncoordinated traffic signals
  • Traffic modelling…
    • run all Demand Sets for each Analysis Set
    • run all stage sequences
    • alternative fast (link-by-link) optimisation
  • Workflows, productivity and reporting…
    • dynamic Excel link for easy capture of flow data
    • enhanced and extended import/export options
    • batch run facility
    • retrospective auto-naming of network components
  • Enhancement: New alternative triangular platoon dispersion model (PDM), and associated file preference and file option (24.7)
  • Enhancement: Triangular PDM own default dispersion and acceleration coefficients (24.7)
  • Enhancement: “First time wizard” extended to include Chilean setup values
  • Enhancement: Russian language version: New translations added
  • Enhancement: bus/tram dispersion coefficients can now be applied to each individual traffic stream or link (25.7.1)
  • Enhancement: Improved OD matrix flow allocation “Lane Balancing” for when relevant “paths” are unconstrained
  • Enhancement: User Guide now opens within program with a wider range of PDF readers
  • Enhancement: Option to “save files without results included” is now available (6.14.5)
  • Revision: HTML report revised to report relevant dispersion coefficients
  • Revision: New TRL Software contact details referenced
  • Revision: Arm IDs accept longer IDs, to facilitate new TRANSYT export from Junctions 9
  • Revision: Warning message about missing nodes is now suppressed in some circumstances
  • Revision: Priority Junction major road data item tool-tips improved
  • Revision: Revised user guide, reflecting the various product enhancements – Issue K
  • Fix: Results no longer flagged as out-of-date when they’re not (Related to RR67 data)
  • Fix: 125% DPI setting no longer affects “Main Data” Window and various tick-boxes
  • Fix: Cost unit symbol now taken account of when opening Library Files
  • Fix: Reported delay/queue associated with a give-way with zero capacity and with random give-way parameters both set to true, now corrected
  • Fix: Wide-area matrix fix relating to use of “Allow looped paths on traffic nodes”
  • Fix: Importing of normal traffic sub-category flows now works properly
  • Fix: Indexing issues with multiple sets resolved
  • Fix: Stops calculation revised to accommodate the presence of short moving queues
  • Fix: Issue with the order of links across time-segments resolved
  • Fix: Problem relating to deleting traffic streams referenced by give-ways now resolved
  • Fix: Optimiser no longer affected by presence of different cycle times within one network
  • Fix: Rotation of master controller timings, no longer causes mismatch with animations
  • Enhancement: Option to rotate all signal timings, in order to retain the same master controller offset after optimisation (or to set the master controller offset to zero) (26.5.6)
  • Enhancement: Easier to spot differences in intergreen matrix that involve absent conflicts
  • Enhancement: Right-click option on the main menu Data Grid & Data Editor button, allows you to quickly change from grid to editor or vice versa for the currently displayed topic
  • Enhancement: Multi-selection now easier, as selection is less readily reset
  • Enhancement: Data grids now allow multiple rows to be deleted in one go
  • Enhancement: Network diagram orange highlighting ‘toned down’ with opacity option added
  • Enhancement: If a filter is applied, selections in the diagram now only apply to filtered items
  • Enhancement: Network Diagram upstream/downstream arrows fade colour to reflect distance from origin
  • Enhancement: SCATS volume flow import now works with either 48 detector file format or older 24 detector file format and also with multiple approaches within the exported file
  • Fix: Network diagram text orientation is now correct when rotated in 3D mode
  • Fix: Time distance Diagram no longer crashes when the data it shows is removed
  • Fix: Stage Sequence Diagram: Right-click options no long cause any crashes
  • Fix: Demo mode no longer erroneously taking account of the number of previous changes in the file prior to opening it. This ensures demo mode always allows a limited number of small changes to data files
  • Fix: Reports including diagrams are no longer intolerant of filenames that include ampersands
  • Fix: Unrestricted stop lines and bottlenecks now more visible in network diagram
  • Fix: Stage sequence diagram: Blue animation now works correctly for repeated stages
  • Fix:Traffic streams can now be connected downstream of links (i.e. flows retained)
  • Fix: The special screen right-click menus now works as expected
  • Fix: Flow Mode graph now shown when selecting paths via local matrix
  • Fix: Hidden (pedestrian) end-of-green amber value is no longer erroneously added to the intergreen when using clearance times
  • Fix: Editable bus and tram acceleration rate now exposed as correct value. Note: This is only relevant if the default has been changed
  • Fix: 125% Windows DPI setting no longer results in cropping of text in Traffic Streams window
  • Fix: Matrix path item names (and references to them) now updated during file merging
  • Fix: Up-to-date red/green check is no longer broken by “proportion that turn” data item
  • Revised User Guide – Issue J

Users of TRANSYT 15.0 and 15.1 might also benefit from looking at this short list of changes:

(References to relevant sections of the User Guide are shown in brackets)


  • Modelling Improvements
    • Automatic network structure minimisation used to speed up optimisation runs
    • Tool to auto-calculate pedestrian conflicts from the network diagram (15.5.3)
    • Tool to auto-calculate pedestrian intergreens from a scaled diagram (15.5.3)
    • Reducing cycle times is less likely to result in invalid initial timings
    • Option to set cell saturation flow values automatically
    • Minimum saturation flow value reduced to 50 PCU/hr
  • Data handling improvements
    • Saving of results for all analysis sets within one file (6.14.6)
    • Run all data sets in one go (Evaluation or optimised) using ‘run button’ dropdowns (6.8)
    • Red/green colour-coded tracking of up-to-date and out-of-date results (6.13)
    • Analysis sets and demand sets can be colour-coded to assist in keeping track of categories of sets, or to match up related demand sets (12.5)
    • Main menu right-click options allow analysis/demand sets to be added or removed
    • User-selectable sharing of data items between data sets (12.3)
    • local OD Matrix can use flows from another local OD Matrix (13.4.5)
    • OD Matrix grids now only show locations associated with the currently displayed traffic type, making them smaller and easier to use
    • Ability to update multiples of the same data item in one go, using a data grid.  Newly applies to dropdown selections and check boxes as well as text and numbers (6.12)
    • Dispersion coefficient data-entry simplified
  • Lane-flow diagram “flow overlays” (10.10.9)
    • Show demand flows, achieved flows, or lost flows
    • Filter (and colour-coded) by origin and/or destination, by OD matrix or by OD Location
  • Network representation/diagram redesigned to improve ease-of-use (10)
    • Stop-lines improved
    • Auto-set lane arrows, based on estimated traffic turning movements (10.5.2)
    • Quickly show results on background without network structure (10.10.4)
    • Manipulating backgrounds no longer suffers from annoying de-selection
    • Option to suppress bend points (default is on) to speed up network creation (6.18)
    • Right-click ‘control’ type selection easier to use
    • Existing collections can now have items added to them, via the right-click menu
    • Second phases can now be specified using the traffic stream right-click menu
    • Connectors now have direction arrows
    • Improved scaling of overlays of pedestrian and vehicle flows
    • Option to hide toolbars
    • Quick flares now more visible (16.2.2)
    • Orange highlighting now easier to see when zoomed out
    • Most network overlays now have a full key
  • General graphical interface improvements
    • Ability to take any window outside of the main window by double-clicking on its header (6.17.2)
    • Fully labelled tool bars for ease-of-use
    • Layout of special windows improved (e.g. Main Data window)
    • Multiple data editor windows can be open at the same time (7.4)
    • Freezing of data editor/data grid contents using a forth-level padlock, allowing you to compare before and after results (6.11)
    • Stored window layouts now work with multiple monitors (6.17)
    • Size of the underlying network structure (path segments) of traffic stream network now reported in the bottom right-hand corner of the main window (6.8.1)
    • New “sync” button (see main menu) forces data grid to display data related to currently selected data item (9)
    • New “Fast mode” (see “Data” menu) increases GUI responsiveness when working with large networks (6.6)
    • Copy and pasting of part sections of any data grid now allowed
    • Improved quality of copy and pasted graphics (including option to define image resolution) (10.4)
    • New “Exhaustive data outline” option (Default is off) hides non-essential items unless they already exist in the file (6.18)
    • Use of new default OD Matrix settings ensures the use of traffic nodes is optional
    • Various minor enhancements to Audit Trail facility (23.1)
    • Task List has wrapping text descriptions to make long messages easier to read
  • Other diagram improvements
    • New “phase diagram” option in stage sequence diagram (15.7.5)
    • Layout and available options for stage sequence diagram improved generally
    • In the stage sequence diagram, two options have been added to select alternative sequences and to set the currently displayed sequence as the active one (15.7)
    • Option to hide banned stage transition diagram in stage sequence diagram
    • Multiple cycling shown differently
    • Intergreen matrix banded stage changes more logically uses crosses instead of ticks
  • Reporting Improvements
    • Enhanced file comparison that allows comparisons between separate files and also within the same file, e.g. between different data sets (20.4)
    • Vertical toolbar “Results” button to speed access to most important summaries (19)
    • Rows of tables containing the same data are collapsed down to a single “All” row, and hence reduces the length of reports
    • Signal timing penalties now reported as part of the controller results (21.3.1)
    • Enhanced cyclic flow profile (CFP) and analyser graphs (19.4)
    • Both CFP and Traffic graphs can be added to reports in either single or double column format (19.4)
    • Wide-Area Matrix tables now available in the HTML report (21.1)
    • New option to suppress pedestrian tables (21.1)
    • Local matrices’ general settings now in HTML report
    • Minor Final Prediction Table improvements
Area Change
MODEL (Fix) Source data now correctly interpreted on inter-matrix connections
LINKS TRANSYT Aimsun LINK now works with Aimsun releases 8.0.8, 8.0.9 and 8.1.0
LINKS TRANSYT VISSIM LINK now works with VISSIM release 7.00.07
UI Timing Diagram: Stage timing text values now always appear in report
UI Timing Diagram: Phase delay duration easier to see
UI Timing Diagram: More options saved as File Preferences and also appear in report
UI Give-ways on exits (connected directly to OD Location) now tolerated
LICENCING Priority Objects updated to notice presence of ARCADY 9 and PICADY 9 licences
UI (Fix) Collections now work with the new PCU factors
UI (Fix) Merged Collections now correctly reference renamed link and traffic stream IDs
RESULTS (Fix) Inapplicable pedestrian results no longer added to reported network totals
UI (Fix) The accidental re-sizing of the report font-size, instead of scrolling the report, is now fixed
UI (Fix) Adjusting the network spacing in a diagram now adjusts crossings too
UI (Fix) Fix: Mini-roundabout “Arm Order” now correctly referred to as “Entry Order”
REPORT Contents: Small improvements and removal of various anomalies
REPORT Clearer text on images in reports
REPORT Unnecessary bookmarks automatically removed from exported Word file
UI / REPORT Stage Sequence Diagram: Improved readability in GUI and in the report
UI Various changes to UI to accommodate DPI 125% setting
UI Controller Streams are now opaque white to make them easier to see
REPORT Dutch TxC calculation now reported for each traffic stream/link that it is requested for, instead of for each phase. Results based on user-selected flow sources now provided
FILES Collection of supplied Library Files updated – Three new files added
USER GUIDE Issue G: Revised to reflect the above changes, including a new section on filters and how to set up traffic streams controlled by two phases

Current Version: 16.1.6 Version History

System Requirements:

Windows 10 or above

Supported Browsers (Portal only):

Google Chrome (latest version)
Mozilla Firefox (latest version)
Microsoft Edge (latest version)

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Training Course Schedule

TRANSYT 16 Course (3-Day face-to-face)
7th - 9th October 2024 at Crowthorne, Berkshire
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TRANSYT 16 Demonstration Video

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