TRANSYT 16 Enhancements

Driven by our customers, TRANSYT 16 incorporates major modelling improvements, data handling improvements, and various user interface enhancements all designed and implemented to make TRANSYT more capable, easier to use, and quicker to use.  A key enhancement is the introduction for the first time of a simulation model, 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 model enables our customers to model scenarios not possible before.

TRANSYT

Simulation Mode

As the major modelling focus for this release a lot has been packed into our first 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
  • Explicit modelling of blocking back effects
  • Modelling of uneven lane usage / lane starvation
  • Modelling of complex flares (short bays / pockets) at traffic signals
  • Entire modelled time period allowing network performance to be examined in detail at any point in time
  • Animation of individual vehicles.
Simulation Screen
Double roundabout coloured by delay

Other capabilities:

  • Information-rich graphical animations showing traffic behaviour within the network
  • Animations showing estimated positioning of individual vehicles
  • Support for in-depth analysis via signal log for full modelled time period
  • Percentile queue lengths displayed
TRANSYT 16 animation of individual vehicles

Further modelling enhancements

  • “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

Enhanced workflows and productivity

Data handling enhancements is one of the noticeable features of TRANSYT 16.  Some of these have been inspired or inherited from those already seen in Junctions 9, 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

  • 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
  • Option to automatically re-allocate low flows to alternative busier paths (to simplify the underlying network structure and speed up run times)
  • Negative flows allowed in local OD matrices – Allowing reduced demand be part of composite flows
  • Local OD matrix (user equilibrium) assignment of flows – ideal for complex junctions containing alternative routes through them.

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
  • Arm/link splitting facility – to make it easier and quicker to add new side roads
  • Network background image: scale-with-drawing option
  • Redefinition of connectors is improved when using the “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)
  • Various minor annoyances fixed.
Results summary screen

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 signal controller streams and pedestrian crossings, allowing easier reporting of individual junction results.
  • Save and load Analyser Graphs
  • Option to base Analyser graphs on either evaluation or optimised runs of the model
  • Distance between each “OD Location” pair now reported
  • Location-to-location “Route journey times” involving multiple local OD matrices

Traffic Signals

Although not a major focus of this version of TRANSYT, several enhancements have been made with respect to signal timings:

  • 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.