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Data Dictionary
Michael McCarthy edited this page Jan 29, 2026
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| Field | Description | Data Type | Usage |
|---|---|---|---|
| CensusBlockGroup | Census Block Group ID | Integer | Reference |
| CensusTrac | Census Tract ID | Integer | Reference |
| District ID | District Number | Integer | Reference |
| District Name | District Name | Text | Reference |
| HousingUnits | Number of Households (Occupied Housing Units) | Float | User-supplied Input to Household Submodels |
| HousingDensity | Housing Units per square mile | Float | Calculated (Reference) |
| ACS_AvgHHSize | Average HH Size for the Tract in ACS | Float (rounded to 1 decimal place) | Reference (Unused) |
| ACS_AvgHHSize_BG | Average HH Size for the Block Group in ACS | Float (rounded to 1 decimal place) | User-supplied Input to Household Size model |
| HHINC | Average Income for the Tract in ACS | Float | User-supplied Input to Household Income model |
| TotPopulation | Total Population | Float | Reference (Unused) |
| TotEmployment | Total Employment | Float | User-supplied Input |
| EMP_RETAIL | Retail and Food Services Employment | Float | User-supplied Input |
| EMP_FIRES | Finance, insurance, real estate, services Employment | Float | User-supplied Input |
| EMP_GOVERNMENT | Government Employment | Float | User-supplied Input |
| EMP_EDUCATION | Education Employment | Float | User-supplied Input |
| EMP_WTCU | Wholesale trade, transportation, utilities Employment | Float | User-supplied Input |
| EMP_MFG | Manufacturing Employment | Float | User-supplied Input |
| EMP_RESOURCE | Agriculture, forestry, fishing, mining Employment | Float | User-supplied Input |
| EMP_HEALTH | Health care, social assistance Employment | Float | User-supplied Input |
| EMP_SELF | Self Employment | Float | User-supplied Input |
| EXT_AUTO_GROWTH | External Auto growth rate | Float | User-supplied Input to External trip model |
| HHWRK0 | Households with 0 Workers | Float | Household Submodel Ouput |
| HHWRK1 | Households with 1 Workers | Float | Household Submodel Ouput |
| HHWRK2 | Households with 2 Workers | Float | Household Submodel Ouput |
| HHWRK3 | Households with 3+ Workers | Float | Household Submodel Ouput |
| HH1VEH0 | Cross-classified Households with 1 person and 0 Vehicles Available | Float | Household Submodel Ouput |
| HH1VEH1 | Cross-classified Households with 1 person and 1 Vehicle Available | Float | Household Submodel Ouput |
| HH2VEH0 | Cross-classified Households with 2 persons and 0 Vehicles Available | Float | Household Submodel Ouput |
| HH2VEH1 | Cross-classified Households with 2 persons and 1 Vehicle Available | Float | Household Submodel Ouput |
| HH2VEH2 | Cross-classified Households with 2 persons and 2 Vehicles Available | Float | Household Submodel Ouput |
| HH3VEH0 | Cross-classified Households with 3 persons and 0 Vehicles Available | Float | Household Submodel Ouput |
| HH3VEH1 | Cross-classified Households with 3 persons and 1 Vehicle Available | Float | Household Submodel Ouput |
| HH3VEH2 | Cross-classified Households with 3 persons and 2 Vehicles Available | Float | Household Submodel Ouput |
| HH3VEH3 | Cross-classified Households with 3 persons and 3+ Vehicles Available | Float | Household Submodel Ouput |
| HH4VEH0 | Cross-classified Households with 4+ persons and 0 Vehicles Available | Float | Household Submodel Ouput |
| HH4VEH1 | Cross-classified Households with 4+ persons and 1 Vehicle Available | Float | Household Submodel Ouput |
| HH4VEH2 | Cross-classified Households with 4+ persons and 2 Vehicles Available | Float | Household Submodel Ouput |
| HH4VEH3 | Cross-classified Households with 4+ persons and 3+ Vehicles Available | Float | Household Submodel Ouput |
| INC_INDEX | Index of Zonal Average Income to Regional Average | Float (rounded to 1 decimal place) | Household Submodel Ouput |
| Field | Description | Data Type | Usage |
|---|---|---|---|
| TypeNo | Link Type Number | Integer | Lookup |
| NumLanes | Number of Lanes by direction | Integer | User-supplied (VISUM attribute) |
| ADD_CAP | Additional Hourly Capacity | Integer | User-supplied |
| V0PrT | Free-flow Speed (mph) | Integer | User-supplied (VISUM attribute) |
| CapPrT | Directional Capacity | Integer | Lookup from Link Type, used in previous assignment (tpyically OP)* (VISUM attribute) |
| VolVehPrT(AP) | Assigned Volume (in Vehicles, Private Transport modes) | Float | Calculated, used in previous assignment (tpyically OP) (VISUM attribute) |
| AM_CAP | AM Directional Capacity | Integer | Calculated |
| PM_CAP | PM Directional Capacity | Integer | Calculated |
| OP_CAP | OP Directional Capacity | Integer | Calculated |
| PMPK_CAP | PM Peak Hour Directional Capacity | Integer | Calculated |
| AM_SPEED | AM Congested Speed | Integer | Calculated |
| PM_SPEED | PM Congested Speed | Integer | Calculated |
| OP_SPEED | OP Congested Speed | Integer | Calculated |
| PMPK_SPEED | PM Peak Hour Congested Speed | Integer | Calculated |
| AM_VOL | AM Assigned Demand | Float | Calculated |
| PM_VOL | PM Assigned Demand | Float | Calculated |
| OP_VOL | OP Assigned Demand | Float | Calculated |
| VOL_CORR | Volume LOS Corridor ID | Integer | Flag for Reporting |
| VOL_CORR_2 | Volume LOS Corridor ID (secondary) | Integer | Flag for Reporting |
| TT_CORR | Travel Time LOS Corridor ID | Integer | Flag for Reporting |
* Some of the VISUM attributes are changed for each assignment and retain their values from the prior assignment, typically OP as these trips are assigned last in a model run. Take care when referencing these attributes directly.
Intersection control and delay are a function of Node Type Number and Control Type lookup.
| Field | Description | Data Type | Usage |
|---|---|---|---|
| TypeNo | Node Type Number | 5 - Node Capacity for Two-way Stop 6, 20, 43 - Node Delay |
Lookup |
| ControlType | Intersection Control Type | 0 - Unknown 1 - Uncontrolled 2 - Two-way Stop 3 - Signalized 4 - All-way Stop 5 - Roundabout 6 - Two-way Yield |
User-supplied Input |
Network attributes are used to hold the scenario and base model years for the external growth calculation and a scenario name for naming output folders.
| Field | Description | Data Type | Usage |
|---|---|---|---|
| SCEN_YEAR | Current Scenario Year | Integer | User-supplied Input |
| BASE_YEAR | Base Year | Integer | User-supplied Input |
| SCENARIO | Current Scenario Name | Text | User-supplied Input |
These variables can be changed while creating/editing modifications to the base year network. The BASE_YEAR should remain at 2022 until the next model update. The SCEN_YEAR should be changed to 2045 or 2050 in future year modifications. Model Reporting ouputs are written to the folder SCOG_Model_2022\Outputs\ModelRun_SCENARIO_YYYYMMDD.
Path: SCOG_Model_2022\SharedData\External\Ext_Sta_Summary.csv
| Field | Description | Data Type | Usage |
|---|---|---|---|
| NO | External Zone Number | Integer | Lookup |
| Name | External Corridor Name | Text | Reference |
| Notes | Additional Notes | Text | Reference |
| AADT | Total Average Annual Daily Traffic count | Float | Reference |
| Auto_AADT | Average Annual Daily Auto Traffic count | Float | Reference |
| Trk_AADT | Average Annual Daily Truck Traffic count | Float | Not Used (No Truck fields are used) |
| Auto_XX_O | Auto XX Origin Trips | Float | User-supplied Input |
| Auto_XX_D | Auto XX Destination Trips | Float | User-supplied Input |
| Auto_XIIX_OD | Auto XI/IX Trips | Float | User-supplied Input |
| XI_W% | XI Work Share of XI/IX Trips | Float | User-supplied Input |
| IX_W% | IX Work Share of XI/IX Trips | Float | User-supplied Input |
| X_NW% | XI/IX Non-Work Share of XI/IX Trips | Float | User-supplied Input |
| Auto_IX% | Unused | ||
| Auto_XX% | Unused | ||
| AutoXXO% | Unused | ||
| AutoXXD% | Unused | ||
| Auto_XX_O_Out | Grown Auto XX Origin Trips | Float | Output |
| Auto_XX_D_Out | Grown Auto XX Destination Trips | Float | Output |
| Auto_XIIX_OD_Out | Grown Auto XI/IX Trips | Float | Output |
Path: SCOG_Model_2022\SharedData\HH_Submodel\Parameters\HHSizeModel.csv
| Field | Description | Data Type | Usage |
|---|---|---|---|
| HHSIZE | Zonal Average Household Size | Float (rounded to 1 decimal place) | Lookup |
| HH1 | Household Size 1 proportion | Float | User-supplied Input |
| HH2 | Household Size 2 proportion | Float | User-supplied Input |
| HH3 | Household Size 3 proportion | Float | User-supplied Input |
| HH4 | Household Size 4 proportion | Float | User-supplied Input |
Path: SCOG_Model_2022\SharedData\HH_Submodel\Parameters\IncomeModel.csv
| Field | Description | Data Type | Usage |
|---|---|---|---|
| INC_INDEX | Index of Zonal Average Income to Regional Average | Float (rounded to 1 decimal place) | Lookup |
| HHINC1 | Household Income 1 proportion | Float | User-supplied Input |
| HHINC2 | Household Income 2 proportion | Float | User-supplied Input |
| HHINC3 | Household Income 3 proportion | Float | User-supplied Input |
| HHINC4 | Household Income 4 proportion | Float | User-supplied Input |
Path: SCOG_Model_2022\SharedData\HH_Submodel\Parameters\NumberOfWorkersModel_MNL.csv
| Field | Description | Data Type | Usage |
|---|---|---|---|
| Variable | Variable name or ASC | Text | Lookup |
| Work0 | Work0 Coefficient | Float | Input Parameter |
| Work1 | Work1 Coefficient | Float | Input Parameter |
| Work2 | Work2 Coefficient | Float | Input Parameter |
| Work3p | Work3p Coefficient | Float | Input Parameter |
Path: SCOG_Model_2022\SharedData\HH_Submodel\Parameters\NumberOfVehiclesModel_MNL.csv
| Field | Description | Data Type | Usage |
|---|---|---|---|
| Variable | Variable name or ASC | Text | Lookup |
| Veh0 | Veh0 Coefficient | Float | Input Parameter |
| Veh1 | Veh1 Coefficient | Float | Input Parameter |
| Veh2 | Veh2 Coefficient | Float | Input Parameter |
| Veh3 | Veh3 Coefficient | Float | Input Parameter |