This document provides a brief description of the enhancements included within each new release of the software.

Release 12.1.0: July 26, 2023

This release introduces integration with Institute of Transportation Engineers’ (ITS) TripGen11. A wizard style interface allows users to import the calculated number of trips generated by user selected land uses and then utilize the data within the Traffic Impact Analysis (TIA) module within Synchro. Users must have TripGen11 license based on ITE user agreements.  The username and password must be entered within the TIA Module to access trip generation data.  Calculated trip data can then be imported for use within the TIA Module. Refer to the User Guide for additional details.

The following bug fixes and enhancements are also included with release 12.1.

  1. HCM 7th Edition 
    1. TWSC intersections, the new equation was introduced to consider Shared Major-Street Lane Effects.
    2. A new parameter Pedestrian Satisfaction Probabilities was introduced to determine Level of Service (LOS) for pedestrian at TWSC intersections.
    3. Adjustments were made to the calculation of Groups of Pedestrians, Pedestrian special distribution, Average Pedestrian Delay, Pedestrian Average Headway, Pedestrian - One Lane Crossing at TWSC intersections.
  2. User Interface Update
    1. Home Tab – Lanes & Volumes Templates and Zoom groups were updated with new set of icons.
    2. Time Space Diagram (TSD) window was updated to exhibit a modern look & feel.
  3. Miscellaneous
    1. In the Create Reports window in Synchro and SimTraffic, the button text has been changed from OK to Apply for clarity.
    2. Copying Network data from one scenario to another now includes all network settings, such as "Travel Speed" and "Cycle Length" defaults.
    3. Default map settings are now applied to new scenarios created before the Synchro file is saved.
    4. New scenarios now default to today’s date.
    5. Controller Delay in Timing window no longer shows "Error" for U-Turns.
    6. When saving a scenario, save file as dialog box no longer adds a "-" to the filename.
    7. Scenario Name in title bar drop down no longer stretches over dropdown arrow.
    8. Ctrl + R now opens Create Reports window when Synchro first loads.
    9. Spacebar shortcut now clears intersection text. Ctrl+Space Bar clears movement text.
    10. Left-Turn and Right-Turn Equivalency Factors are now overridable fields with default value.
    11. Exclusive Ped Phases or Hold Phases in Timing Grid now persist as expected.
    12. Average Ped Delay no longer changes with Pedestrian Volume unless the Ped Platooning is selected.
    13. The "#" shortcut now toggles node number as expected.
    14. Blank report header and footer are allowed for defaults.
    15. Offline Bing Maps endpoint has been updated to correct connection issues.
    16. Offline background images are now transferred when duplicating scenarios.
    17. Select Intersection function now accepts keystrokes once window is displayed.
    18. Text reports now use windows style end of line characters.
    19. UTDF volume import no longer shows "Key not found in dictionary" error in some cases.
    20. Network Settings no longer pops up on double click in main data grids.
    21. Printed width of reports is now scaled when possible, preventing runoff onto extra pages.
    22. Control Type is no longer changeable in the HCM2010, HCM 6th, and HCM 7th grids.
    23. Print window function now shows all details available.
    24. SimTraffic video recording speed now matches playback speed during recording.
    25. Multi-selected intersections can now be assigned a node configuration template.

Release 12.0.0: May 15, 2023

This section outlines some of the major changes in the initial release of Synchro Studio 12.  A comprehensive list of changes from Synchro Studio 11 to the initial release of Synchro Studio 12 can be found in the Getting Started and What's New in Version 12 document.

  1. Enhanced Scenario Manager – Synchro 12 introduces an enhanced Scenario Manager that enables users to save multiple scenarios with varying geometries to a single Synchro file to efficiently track each alternative. 
    1. Enhanced Scenario Manager allows multiple scenarios to be saved in a single Synchro file with different geometry, volumes & timings, resulting in a reduced number of Synchro files needed for the same network/project.
    2. Geometry can now be changed for each scenario individually.
    3. SimTraffic has been updated to support multiple scenarios with different geometries.
    4. Traffic Impact Analysis (TIA) also supports scenarios with different geometries.
    5.  The Scenario Manager window has been revamped to provide a fresh appearance and user-friendly controls.
  2. HCM 7th Edition – Synchro 12 supports the signalized intersection, all-way stop control (AWSC), two-way stop control (TWSC), and the roundabout methods.
    1. The HCM 7th Edition Settings pane includes three expandable sections: Signal Timing Details, Adjusted Flow Rate, and Ideal Saturated Flow. The most commonly used parameters are viewable with all sections collapsed, with additional details about the intersection available by expanding one or more of these section(s).
    2.  A new field is available for signalized intersections to input the proportion of Connected Automated Vehicles (CAVs) in the traffic stream.
    3. New base saturation flow rates have been added to the signalized intersection analysis to account for CAVs for through movements.
    4. Modifications were made to the lane width adjustment factor to account for proportion of CAVs.
    5. New saturation flow adjustment factors have been added to the signalized intersection analysis to account for CAVs for protected & permitted left turns.
    6. A new field is included for the roundabouts to enter the proportion of CAVs in the traffic stream.
    7. New fields are included for the roundabouts to introduce intercept parameters & slope parameters to account for the proportion of CAVs.
    8. Modifications were made to the capacity adjustment factor to account for the proportion of CAVs for roundabouts.
    9. Modifications were made to the equation for calculating Minor-Street Left-Turn Movements for TWSC intersections.
    10. Control Delay & Rank 4 Capacity for One-Stage Movements equations have been modified for TWSC intersections. 
    11. For TWSC intersections, the new equation was introduced to model Compute Flared Minor-Street Lane Effects.
    12. Corrections were made to the calculation of Effect of Major-Street Shared Through and Left-Turn Lane and Potential Capacity, accounting for the effect of platooning for TWSC intersections.
  3. Ribbon Bars – The Synchro user interface has been updated, featuring new buttons with easy-to-use ribbon bar controls.
    1. Buttons under mapping groups were reorganized.
    2. A new group was introduced to combine all HCM methodologies under one group and an HCM 7th Edition button was added as well.
    3. All icons in Synchro, SimTraffic, and 3D Viewer have been modernized.
  4. Data Entry Grids – The data entry grids in Synchro & SimTraffic were updated to exhibit a modern look & feel with easy-to-use controls.