Major Updates

  1. Read and output node and link geometries (v0.6.0)

  2. Set up individual agents from aggregated OD demand only when it is needed (v0.6.0)

  3. Provide a setting file in yaml to let users control key parameters (v0.6.0)

  4. Support for multi-demand-period and multi-agent-type (v0.6.0)

  5. Load columns/paths from existing runs and continue path-base UE (v0.7.0a1)

  6. Download the predefined GMNS test data sets to users’ local machines when needed (v0.7.0a1)

  7. Add allowed use in terms of agent type (i.e., transportation mode) for links (v0.7.0a1)

  8. Calculate and show up multimodal accessibility (v0.7.0a1)

  9. Apply lightweight and faster implementation on accessibility evaluation using virtual centroids and connectors (v0.7.0)

  10. Get accessible nodes and links given mode and time budget (v0.7.0)

  11. Retrieve shortest paths under multimodal allowed uses (v0.7.2)

  12. Time-dependent accessibility evaluation (v0.7.3)

  13. Fix crucial bug in accessibility evaluation (v0.7.5)

  14. Deprecate node_sum as hash index in column generation (v0.8.0)

  15. Optimize class ColumnVec, setup_agents() in class Network, and column generation module (i.e., colgen.py) (v0.8.1)

  16. Deep code optimization in column generation module with significant performance improvement (v0.8.2)

  17. Let users choose which speed to use in accessibility evaluation (either the free speed of an agent specified in settings.yml or the link free flow speed defined in link.csv) (v0.8.3)

  18. Transportation equity evaluation (v0.8.3)

  19. Introduce special events with affected links and capacity reductions (v0.8.4)

  20. Synthesize zones and demands (v0.8.5)

  21. Add support for Apple Silicon (v0.8.5)

  22. More robust parsing functions (v0.8.6)

  23. Fix crucial bug in column generation module which will lead to wrong results if a zone has multiple nodes (v0.8.6)

  24. Fix crucial bug in setting up the capacity of each VDFPeriod instance if the input is missing from link.csv (v0.8.6)

  25. Add backwards compatibility on deprecated default agent type of p or passenger (v0.8.7a1)

  26. Fix potential issue in setup_spnetwork() which requires zone id’s are in ascending order (v0.8.7a1)

  27. Fix potential issue that bin_index might not start from zero along with potential zero division issue when all zones have the same number of nodes in _synthesize_bin_index() (v0.8.7a1)

  28. Enhance the tutorial with elaboration on the legacy way of loading demand and zone information and some caveats. (v0.8.7a1)

  29. Calculate and print out relative gap of UE as convergency measure (v0.8.7)

  30. Support the most common length and speed units. See tutorial for details (v0.8.7)

  31. Introduce the simulation module along with a simple traffic simulator using the point queue model and shortest paths (v0.9.0)

  32. Fully optimize the C++ routing engine (v0.9.1)

  33. Use the UE result as routing decisions for simulation (v0.9.1)

  34. Optimize the column generation module with faster and better UE convergency (v0.9.2)

  35. Fix the bug on updating the total system travel time (v0.9.2)

  36. Resolve the potential issue on traversing the last through node in path engine (v0.9.2)

  37. Fix the bug on loading columns where link path and node paths are not in the proper order (v0.9.2)

  38. Fix the bug on handling link capacity reduction in traffic assignment (v0.9.3)

  39. Remove dependency on demand.csv for loading columns (v0.9.3)

  40. Deprecate find_path_for_agents() (v0.9.3)

  41. Remove beg_iteration and end_iteration from setting up a special event (v0.9.4)

  42. Enhance DemandPeriod setup on time_period (v0.9.4)

  43. Fix multiple bugs related to simulation including calculation of agent arrival time and agent waiting time, link traverse time, and link outflow cap (v0.9.4)

  44. Remove memory_blocks and its implementations (which were intended for multiprocessing) (v0.9.4)

  45. Bring back the postprocessing after UE in case users do not do column updating (i.e., column_update_num = 0) (v0.9.4)

  46. Drop the requirement that node id must be integer (v0.9.5)

  47. Drop the requirement that zone id must be integer (v0.9.5)

  48. Eliminate ultra-low-volume columns from assignment (v0.9.6)

  49. Calculate and print out the final UE convergency after the postprocessing (v0.9.6)

  50. Embed and support the latest DTALite in addition to the existing classic version (v0.9.6)

  51. Complete update 47 introduced in v0.9.5 (v0.9.7)

  52. Introduce unit testing (v0.9.8)

  53. Support recurring calls of run_DTALite() in terminal and fixes issues regarding accessibility output (v0.9.8)

Detailed update information can be found in Releases.