1. Travel Modelling Group Technical Advisory Committee
January 8, 2014

2. Today’s Agenda GTAModel V4 Progress 2012 Base Network
Network Package Update
Network Editing Library
Other Software Improvements
Update to NCS 11
Next Meeting: Wednesday, March 5, 2014 at 10:00

3. GTA Model V4 Work Plan Model deployment by March 3, 2014
November
December
January
February
2 - 6
9 - 13
16-20
30 - 3
6 - 10
20-24
27-31
3 - 7
Task 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0. Network Models
Network Estimation
1. Synthesis
2. Car Ownership
3. PORPOW
4. PORPOS
5. NWS Location Choice
6. Rail Access Station Choice
7. TASHA - Activity Generation
8. TASHA - Activity Scheduling
9. TASHA - Mode Choice, etc.
10. External Trips
11. Special Generators
12. Convergence
13. Model system testing (TMG)
TMG Staff (James or Peter)
EJM & TMG Staff (Eric + James or Peter)
Prof. Khandker Habib
Prof. Eric Miller
All TMG Staff (Eric, James, & Peter)
Model deployment by March 3, 2014

4. GTAModel V4 Progress Update
Mode choice estimation modules are coded and tested
Mode Modules are coded
Except Drive Access Transit (DAT), which require station choice first
Activity generation rates are extracted
Fully automated within XTMF
Scheduler is now race-condition free
The same inputs (files, parameters, random seed) will always produce the same outputs
Base network is done
Centroids and connectors are in; network is runnable
Airport model has been converted

5. GTAModel V4 Progress Update
The following components have been designed but not yet implemented:
Place-of-Residence, Place-of-School (PORPOS)
Non-work/school (NWS) location choice
Station choice / DAT Network Assignment
Auto network assignment
Transit network assignment
External trips

6. Completed 2012 Base Network
Consists of two components:
Base network (NWP file)
Transit service table (CSV table)
TMG Toolbox → Network Editing → Dynamic Networks → Create Time Period Network
Tool for creating a network/scenario for a specific time period

7. Update to Network Package
NWP files now include the functions table (.411 file) from their respective emmebank
When importing an NWP file, these functions will be compared against those currently defined in the emmebank for potential conflicts
E.g., if FT1 = length / speed in the emmebank, and FT1 = length / speed + us2 in the NWP file, a conflict will be identified
A window will pop-up prompting the user as to how to handle all identified conflicts

8. Editing Library TMG Toolbox → Common → Editing Utilities
Collection of small functions for scripted network editing
Some functions:
Split/merge links
Transit line manipulations
Shortest-path calculation object
To use:
import inro.modeller as _m
_MODELLER = _m.Modeller()
_editing = _MODELLER.module('TMG2.Common.Editing')
network = _MODELLER.scenario.get_network()
...

9. Other software improvements
Fixed a bug in CCGEN
Error occurs when using Boundary Shapefile
File browser/selector for XTMF parameters
Enhanced TMG.DirectCompute API (GPU interface)

10. Update to NCS11 Transit ROW encoding:
Use Transit Time Function (TTF) to indicate which transit segments use an surface transit-only lane
ROW A (GO Rail, Subway) = FT1
ROW B (surface laneways) = FT2
ROW C (buses, streetcars) = FT3
Links with transit-exclusive ROWs are flagged for convenience using the ‘x’ mode
This should accommodate all current and future ROW needs

11. Using the new encoding Transit background traffic in auto assignment:
Need to calculate transit auto equivalencies manually
tvaeq / hr = 60.0 / headway * tvaeq
Can be stored in UL1, or stored in an extra attribute
If stored in an extrs attribute, need to link that attribute to extra function parameter EL1
VDFs need to be modified to use the new additional volume
Traffic speed updating in transit assignment:
Just modify the appropriate TTFs

12. Thank You!
Next meeting: Wednesday, March 5, 2014 at 10:00 AM