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License: BSD 3-Clause "New" or "Revised" License
Atlanta Regional Commission (ARC) ActivitySim Implementation
License: BSD 3-Clause "New" or "Revised" License
Using the ARC Mode Choice UEC as guide, fill in all of the tour mode choice coefficients into the tour_mode_choice_coeff.csv table.
Only focus on variables in the Excel UEC that start with 'c_'. Some may require formulas in lieu of straight numerical values. You can use the MTC Travel Model 1 tour_mode_choice_coeff.csv as a guide as well for formatting.
The table will look something like this....
Expression | Work | Univeristy | School | NonMandatory | AtWork |
---|---|---|---|---|---|
c_ivt | -0.0247 | -0.0247 | -0.0064 | -0.02142 | -0.02142 |
c_ovt | 0 | -0.0457 | -0.0127 | -0.05432 | -0.05432 |
... | .... | .... | ... | ... | ... |
Using the findings from #3, create the necessary tables and add them to the project HDF5 input file.
The current ARC inputs are here. For future compatibility, we should write a script that uses these inputs.
Review the existing UECs, and develop a comprehensive list of the necessary skims needed to run the ARC CT-RAMP model.
Finalize coveralls setup.
@sidharthanr: In the AutoOwnership.xls UEC there is a reference to a variable called ret30 which looks like it is coming from a file called RetEmp30.csv. I'm guessing this is a preprocessed file of total retail employment within 30 minutes of each TAZ. Do you know how this file is created and what it contains exactly?
Using the ARC Accessibility Logsum class identify the minimum necessary land use, person, household, and skim inputs needed to run and calculate ARC transit accessibilities.
The ARC accessibility batch script controls the process, and it can be run in isolation.
Create a 25x25 sample matrices from the ARC skims, so we can load all the skims into memory on a reasonably sized laptop.
Write a pytest that tests whether ARC CT-RAMP accessibilities match ARC ActivitySim accessibilities.
@sidharthanr : In the AutoOwnership UEC the following four tokens are referenced. I looked in the ArcAutoOwnershipChoiceDMU to get the definition of these tokens, but it looks like they are being pulled from an extended base class (AutoOwnershipChoiceDMU). I don't have access to the base class (com.pb.models.ctramp.AutoOwnershipChoiceDMU). Do you know how these four fields are defined in the Java code?
No | Token | Description | Formula for variable |
---|---|---|---|
12 | workersAutoDependency | Sum of scaled Auto minus Transit MC Logsum across all workers | @workTourAutoTimeSavings |
13 | studentsAutoDependency | Sum of scaled Auto minus Transit MC Logsum across all students | @schoolDriveTourAutoTimeSavings |
14 | workersRailProportion | Sum of rail IVT/transit IVT across all workers | @workerPremiumRatio |
15 | studentsRailProportion | Sum of rail IVT/transit IVT across all students | @studentPremiumRatio |
@sidharthanr: I’ve been working through converting the work and school destination choice UECs to ActivitySim for ARC, and I have a question regarding the ‘shortWalkOrig’ value in the Workplace location UEC. If I’m reading this UEC correctly (which I may not), it looks like shortWalkOrig is always set to a value of 1 which renders it pretty useless. I assume I’m not reading it correctly, but I’m not sure what this value is supposed to be. I’ve looked through the raw ARC Java source code, and I don’t see any references to it in the ARCHouseholdDataManager or ARCDestChoiceDMU. In the ARCHouseholdDataManager there is a property called hhWalkSubZone, but the comments suggest it has been removed from the model flow setting the value to 0. Can you shed any light on whether this shortWalkOrig ever takes on any value besides 1?
I grabbed the UEC from here: https://github.com/wsp-sag/ARC_Model/blob/master/ctrampModels/DestinationChoice.xls
After #1, create a Cube export script to export the necessary skims to OMX. A sample script is available on the OMX project site.
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