TRANSYT 17 Enhancements

Signal Design for Network and Junctions

Driven by our customers, TRANSYT 16 followed by TRANSYT 17, include major modelling improvements, data handling improvements, and various user interface enhancements. These changes are all designed and implemented to make TRANSYT more capable, easier to use, and quicker to use. 

A key enhancement is the introduction of a simulation model in TRANSYT 16, and extensive enhancement in the latest TRANSYT 17.  This model is derived from the proven queue simulation technology which has been used by local authorities and consultancies for several years within our Junctions product. This new feature enables our customers to model scenarios not possible before.

Current Version: 17.0.1

System Requirements

Windows 10 or later

Supported Browsers (Portal only)

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

Training Course Schedule

TRANSYT 17 Course (3-Day, Online) 9th - 11th March 2026 at Online (UK time zone)£810.00

*The cost is per delegate and excludes VAT

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Simulation Mode

As a major modelling focus for TRANSYT 16 and TRANSYT 17, a lot has been packed into the TRANSYT Simulation model. See a summary of its capabilities below:

Modelling scenarios not possible before, or with such accuracy:

  • Non-cyclic (demand-dependent) scenarios, i.e. intermittent stages
  • Basic vehicle actuated signals
  • Optimised actuated signals, that includes variable minimum greens, end-of-sat detection and junction-wide delay minimisation 
  • Explicit modelling of blocking back effects
  • Modelling of uneven lane usage / lane starvation
  • Modelling of complex flares (short bays / pockets) at traffic signals
  • Modelling of unsignalled (Zebra) crossing
  • Modelling of signalled crossings, including ped actuation of signals, and pedestrian queue and delay results
  • Entire modelled time period allowing network performance to be examined in detail at any point in time
  • Animation of individual vehicles, actuated green extensions, and vehicle detections.

Other capabilities:

  • Information-rich graphical animations showing traffic behaviour within the network
  • Animations showing estimated positioning of individual vehicles, vehicle detections, and colour-coded green extensions when modelling actuated traffic signals
  • Support for in-depth analysis via signal log for full modelled time period
  • Enhanced Signals log in TRANSYT 17 offering synchronisation with diagram animations
  • Percentile queue lengths displayed

Further modelling enhancements

  • Core model modelling of cyclists within dedicated cycle lanes, such as at CYCLOPS junctions
  • “Force to PDM and Flare” model option allows you to temporarily stop modelling blocking back, while retaining flares in your network – Useful when looking for the source of blocking
  • Performance improvements by providing a Link-by-Link traffic model (subject to some modelling restrictions) for noticeably quicker optimisation
  • Option to exclude pedestrians from traffic model for a faster run
  • Store different priority object data in each analysis set
T16 animation vehicles
T16 Excel Combined view

Enhanced workflows and productivity

Data handling enhancements is one of the noticeable features of TRANSYT. Some of these have been inspired or inherited from those already seen in Junctions, so will be familiar to users of this other TRL software product. In particular, several improvements have focused on speeding up getting data in and out of TRANSYT, to facilitate the use of data between applications:

  • Dynamically link to Excel spread sheet data (built to tolerate various data layouts in Excel)
  • Copy/paste all demand sets to clipboard, to expedite migration of flows in and out of TRANSYT
  • SCATS ‘dump file’ import facility
  • Partial import of LINSIG 3 data (via RTF report files)
  • Batch running (optimisation) of multiple data files (including the multiple data sets which may exist within each file)
  • Retrospective auto-renaming of network components to speed up initial network building (e.g. traffic streams named after associated controller stream, and/or by node, position in the network or by 8-point compass direction

Traffic Flows

  • Demand Set ordering by Year, Scenario or Time Period, including customisation of rows/columns in Summary Results table 
  • Run all Demand Sets for each Analysis Set, with results presented in a summary grid
  • Optimise using one specific demand set, and run the rest using these timings
  • Reference user-defined growth factors
  • Define more complex ‘relationships’ between Demand sets
  • Automatically re-allocate low flows to alternative busier paths (to simplify the underlying network structure and speed up run times)
  • Use negative flows in local OD matrices, allowing reduced demand be part of ‘development’ traffic flows
T16 Summary Results 12 Demand set and Analysis set Data Grid
T16 Full screen Twin Bridges Multiple screens

User Interface Improvements

Despite many aspects of the latest TRANSYT’s user interface being easier to use than previous versions, we realise that there will always be scope for improvement. With the phrase “ease of use” at the back of our minds, we have endeavoured to make a number of useful enhancements. Here are a few of changes we have made:

  • Enhanced “summary results” system
  • New “Optimisation level” network diagram overlay
  • New “Level of Service” network diagram overlay
  • New journey time results in Simulation
  • Data Editor click-able breadcrumb trail
  • Arm/link splitting facility: Easier and quicker to add new side roads or crossings
  • Network background image: scale-with-drawing option
  • Redefinition of connectors improved when using “Move Lanes Tool”
  • Text associated with a connector can be more easily read by using new “Show all connectors as straight” option
  • Customer experience program (to improve product development)

Reporting Improvements

TRANSYT produces comprehensive and varied output, so there is always scope to improve this element of the product whenever we bring out new release. TRANSYT16 is no exception to this. A number of improvements have been made to the main HTML report, some of which are described below:

  • Cycle Time Optimiser now reports Practical Reserve Capacity (PRC) and Delay in addition to the Performance Index
  • Enhanced Data “Collections”, allowing reports to be filtered by junction
  • Data “Collections” extended to include controller streams and pedestrian crossings, making creation of individual junction results easier  
  • Save and load Analyser Graphs
  • Base analyser graphs on either evaluation or optimised model runs
  • Distance between each “OD Location” pair now reported
  • Location-to-location “Route journey times” involving multiple local OD matrices
  • Graphics in PDF reports improved by use of high resolution bitmap images throughout product
T16 Summary Results Collections
T16 Timings Diagram Phase minimum indication

Traffic Signals

As a key focus for both TRANSYT 16, and more recently TRANSYT 17,  several enhancements have been made with respect to signal timings:

  • Modelling of vehicle actuated signals in Simulation Mode
  • Modelling of optimised actuated signals in simulation Mode
  • Modelling of signalled pedestrian crossings, including ped actuation and pedestrian queue and delay results
  • One-click to run all stage sequences  – quickly see which offers the best performance
  • Minimum & ‘too low’ phase green time indication
  • Controller: minimum possible cycle time displayed and one-click selectable
  • Network: Absolute possible cycle time display and selection
  • Controller minimums now reported
  • One-click application of phase losing delays.
  • Stream-based green start/end adjustments – Can be used as an alternative way of accounting for blocking back green time loses

“Follow Me” Licensing

A licensing system for the 21st century: Over the past decade or so, where and how employees work has changed a lot, with many working from multiple sites or from home. This change has accelerated because of Covid-19. To account for this increased mobility of staff, TRANSYT 16 now offers user world-wide licencing, instead of the previous less flexible equipment-based site licencing system. Here is a list of some of its benefits:

  • Personal user licensing
  • Subscription licences give access to both TRANSYT 16 and TRANSYT 17
  • Log in and use wherever there is the Internet
  • Planned off-line use available when you know you won’t have internet access
  • Licences automatically switched to the device you are using
  • Simple subscription licensing, including support
  • Freedom to reallocate licences to staff yourself, to accommodate organisational changes
Junctions 10 User login screen
J10 Collaboration screen website

Collaboration

Most companies have seen a significant shift to working remotely and an ever-increasing need to conveniently share files. Often these files are numerous enough or big enough to fall outside of what is permitted to be simply emailed to clients, or to colleagues even. This results in delays and difficulties trying to share material. In recognition of this, all TRANSYT 16 subscription licences now include access to your own personal cloud-hosted collaboration storage area. Listed below is some of the collaboration portal’s attributes:

  • Available as part of having an active maintenance contract
  • Can store up to 5GB of files per organisation
  • Enhanced security option with two-factor authentication
  • Create your own folder structure
  • File versioning system
  • Share files or folders within your organisation or outside of it (i.e. with clients)

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