The five colour-coded lane flow types that can be displayed are:
- Demand - i.e. resultant flows as seen in the file's traffic flow OD matrices)
- Demand (scaled) - i.e. resultant flows haven taken account of the vehicle flow scaling factor
- Achieved flow - i.e. what is ultimately in the network
- Lost flow (scaled demand flow minus achieved flow)
The "Display Style" offers the option of showing chosen flows in the form of a bandwidth or using a series of coloured boxes, each of which displays the flows on each lane. When using the "Bandwidth" display style, each traffic stream or link is overlaid with a yellow bar with width scaled according to the volume of flow. This makes it easy to confirm which parts of the network carry the lightest and heaviest flows (relative to each other) and it is easy to spot where traffic is being prevented from reaching parts of the network due to upstream saturation.
The following diagram illustrates options set to "By origin" with a "Bandwidth" display style, making it easier to see that the heaviest movement of traffic is from location 1 to 5.
The following diagram illustrates the Demand using options "By origin" using "Boxes" display style. It is easy to see exactly which lanes are taking the flows from each origin. This view is particularly useful at the design stage of a junction because it is easier to see the effects of the number of lanes and lane movements as part of the design process.
The following screenshot illustrates "Lost Flow" using options "By origin" and using "Boxes". It is easy to identify where traffic is not progressing through the junction. The approach at location 1 is slightly over-saturated, leading to missing traffic on a number of lanes downstream.
User Interface Improvements
There are a number of improvements and enhancements that have been included within TRANSYT 15.5 to make the latest release more intuitive and accessible including a revamp of various screens and menus.
- Fully-labelled main toolbar, making it easier for new users to understand what each button does and quickly familiarise themselves with TRANSYT
- New "Exhaustive Data Outline" option to hide non-essential items making TRANSYT the ideal solution for both new and experienced traffic modellers
- Multiple monitor support for stored window layouts
- Use of traffic nodes now optional with the introduction or new default Origin/Destination settings
- New "Fast Mode" available in the Data Menu to increase TRANSYT's interface responsiveness when working with large networks
- Enhanced copy and paste operations - parts of a data grid can now be copied from and pasted into TRANSYT
- Option of specifying image resolution for graphics copied into TRANSYT
- New "Sync" button available on the main menu forces data grids to display data related to the currently selected data item
- Reduce "working clutter" with the ability to take any window outside of the main TRANSYT screen by simple double-click of the window title bar
- Ability to now have multiple data editor windows open at the same time
- Quickly compare before and after results with the ability to "Freeze" data editor/grid contents
- Improved layout of special data-entry screens
Network Diagram Visual and Functional Improvements
- TRANSYT 15.5 includes the ability to show results, overlays or animations superimposed over background images without showing the network structure, thereby enhancing the available workspace
- Direction arrows are now available for connectors
- Right-click context menu options redefined for ease-of-use, for example existing collections can now have items added and second phases can now be specified using the traffic stream context menu
- Double-clicking on a traffic stream now directs modellers to traffic stream data instead of the arm data
- Stop-lines have been improved by merging direction arrows with user arrows within each lane and automatically defining these based on assumed turning movements as used by the automatic RR67 saturation flow calculations, these can be manually overridden to allow the arrows to match conditions on the street