1. Ohio Traffic Forecasting Manual
Module 3: Part II Exercises

2. Standard Model Checking

3. Standard Model Reports
Under the Highway Assignment module:
Ohio Traffic Forecasting Manual

4. Define Study Area
All links within the study area must have the PROJID attribute coded
Ohio Traffic Forecasting Manual

5. Define Study Area
Use the Drawing Layer to create a polygon and then use the Link Compute to populate the PROJID = ‘WEST’
Ohio Traffic Forecasting Manual

6. RMSE Comparison
Find Report 7: RPT7LIM10VALRMSEBASE.DBF (RMSE for cars in the base scenario) Open file: as default DBF or other exported format (e.g. CSV)
Vol 3 Ex #1 – Check Reports.xlsx
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7. RMSE Comparison
Find Report 7: RPT7LIM10VALRMSEBASE.DBF Study Area: WEST
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8. RMSE Comparison Use the values from the desired RMSE curve from FWHA
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9. RMSE Comparison
Add Region and Study Area RMSE’s to data group Compare curves
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10. VMT Reports Find Report 8: RPT8LIM10VALVMTBASE.DBF
Area Type and Functional Class
Assigned link volumes and link counts
Open file: as default DBF or other exported format
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11. VMT Reports Find Report 8: RPT8LIM10VALVMTBASE.DBF
Each combination of Functional Class and Area Type
Totals of Functional Class and totals of Area Type
Repeat for the study area
Ohio Traffic Forecasting Manual

12. VMT Reports Find Report 8: RPT8LIM10VALVMTBASE.DBF
Repeat for the study area
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13. Screenline Checks Find Report 9: RPT9LIM10SCRLNBASE.DBF
Comparing the sum of assigned volume on a screenline to the sum total of the counts
Graph the percent differences compared to the desired maximum difference based on volume group
Ohio Traffic Forecasting Manual

14. Screenline Checks Used a pivot table to sum the screenlines
Allowable screenline % error uses the values from the desired RMSE curve from NCHRP Report 255 to make a graph
Ohio Traffic Forecasting Manual

15. Ratios of Volumes / Ground Counts
Create a new link attribute field (VOL2CNT)
Link Compute new field values
Plot link Volume/Count ratios by color and thickness
Ohio Traffic Forecasting Manual

16. Review of Land Use Data
Open Land Use data variable file (in DBF format) using a spreadsheet
Compare data within a zone for logical proportions
Create graphs to spot outliers
Ohio Traffic Forecasting Manual

17. Land Use Variable Checking
Population / Household
Workers / Household
Vehicles / Household
Pop18 / Total Population
Workers / Total Population
Hotel Rooms / NAICS 72 Employment
Total School Enrollment / NAICS 61 Employment
Others
ZDATA_LIMZDB.xlsx (from input zonal data DBF file)
Vol 3 Ex #2 – Check Variables.xlsx
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18. Land Use Variable Checking
Population / Household
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19. Advanced Model Checking

20. Select Link Analysis
All travel paths needed will be saved in the *.PTH files if the Save Paths options are checked in the Main Model Run Options (same as PATH* keys are set to 1)
Paths files are large, so not saved by default
The 4 path files for this assignment total 3 GB
Ohio Traffic Forecasting Manual

21. Select Link Analysis Open the NT assigned network: LIM10JNTASNBASE.NET
Open the NT peak period path file in a network: LIM10JPATHNTBASE.PTH
Analysis tab\ Add Path File…
Pick Options:
Mode: Selected Links
Iterations: 20
Selected Links/Nodes: L= *
Click <Display>
Ohio Traffic Forecasting Manual

22. Select Link Analysis
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23. Select Link Analysis Individual Select Link
Saves time when the link is known
Modify the Night Peak Period Assignment script
Save Paths options must be unchecked (PATH1=0)
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24. Select Link Analysis Individual Select Link Modify assignment script
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25. Select Link Analysis Individual Select Link
Only need to re-run Standard Assignment
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26. Select Link Analysis Individual Select Link
Open : LIM10JNTASNBASE_select_link.NET
The volumes for the select link will appear as a new link attributes
V3T_1 (cars)
V4T_1 (trucks)
Display the select link volumes using a link bandwidth
Analysis tab \ Multi-Bandwidth…
Attributes = V3T_1
LIM10JNTASNBASE.NET
Ohio Traffic Forecasting Manual

27. Select Link Analysis Individual Select Link
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28. Turning Movements Available for period and full day assignments
Daily turning volumes are adjusted for truck PCE value
Period turn volumes display all volumes at once and are better for presenting to decision makers
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29. Period Turning Movements
Open the NT peak assignment network
Load in the NT peak output intersection file
Intersection tab \ Output File
LIM10JTURNSNTBASE.INT
Load in the NT Voyager output turning volume file
Intersection tab \ Turn Volume File
LIM10JTURNSNTBASE.DBF
Go to Node 2300
Make sure that the node is selected
Ohio Traffic Forecasting Manual

30. Period Turning Movements
Output intersection file
Click node icon
Post all links with: V_1
(V_1 is the default label for assigned volume)
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31. Period Turning Movements
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32. Period Turning Movements
How does the matrix set of turning volume values compare to the output intersection data?
How do they compare to the approach link volumes posted on the network?
The posted network volumes are PCE adjusted
Ohio Traffic Forecasting Manual

33. Intersection Output Data Volumes
Volume 1 contains auto volumes
Volume 2 contains truck volumes
Combined Volume = Volume 1 + Volume 2
Each selected is added to the total displayed
Default model PCE value is 2.0, so selecting Combined Volume and Volume 2 is equal to autos + 2*trucks
Compare these to the posted network volumes
Ohio Traffic Forecasting Manual

34. Daily Turning Movements
Open the 24 hour assignment network
The 24 hour output intersection file does not exist
Load in the 24 hour Voyager output turning volume file
Intersections tab \ Turn Volume File
LIM10JTURNS24BASE.DBF
Go to Node 2321
Intersections tab \ Display Volumes…
Ohio Traffic Forecasting Manual

35. Daily Turning Movements
Similar to period volumes, but they are PCE adjusted to daily volumes
Sum up the values in a row and compare the approach link volumes
Sum up the values in a row and compare the exiting link volumes
Ohio Traffic Forecasting Manual