1. Building Confidence in TFlowFuzzy
Trip Table Development, Validation and Application in Downtown Windsor

2. Outline Study Overview Traditional Approach
Trip Table Development with TFlowFuzzy
Ways to Improve the Method
Conclusions

3. Overview: City of Windsor
Located across the Detroit River from Detroit, Michigan
Population of 323,000 in 2006
Major auto manufacturing centre
Promoting tourism industry
Expansion of Casino Windsor

4. Overview: Study Area
Tunnel to Detroit
Casino Windsor
Downtown Windsor

5. Overview: Assignment
To evaluate traffic implications of road network modifications
Road closures to facilitate Casino operations and expansion
One-way to two-way street conversions to improve accessibility and exposure to downtown businesses

6. Traditional Approach
Develop / utilize OD Table from survey, macro-level model, etc.
Assign to VISSIM network
Compare simulated volumes to observed traffic counts
Adjust trip table as required
Re-assign

7. Traditional Approach Not applicable in this case: No Survey Data
No Macro-level Model
Need to create a trip table for VISSIM assignment to evaluate the impact of closing a road in the Casino area

8. Reason for Initial Study
New hotel and entertainment complex under construction at time of study
Closing road proposed to facilitate valet parking and VIP entrance

9. Windsor Road Network and Initial Casino Study Area
Potential Road Closure

10. TFlowFuzzy: Model Development
41 zones
102 connectors

11. TFlowFuzzy: Model Development
Established base seed trip table
25 trips between each major gateways pair
12.5 trips between each minor gateways pair
1 trip between internal zone pairs
1 trips between gateways and internal zones
Adjusted seed trip table to ground counts with TFlowFuzzy
Assigned to network in VISUM and compared with ground counts

12. TFlowFuzzy: Analysis Results2% 0% 1% 0%
6% 0%
1% -1%
1% 2% 1% 2%

13. TFlowFuzzy: Analysis Results

14. TFlowFuzzy: Expanded Area
Initial results in small study area provided a reasonable correlation to observed conditions
Client asked for analysis of other proposed downtown road network changes
Network expanded to encompass other proposed changes

15. Windsor Road Network and Expanded Downtown Study Area
Potential Road Closures
Potential Two-way Conversions

16. TFlowFuzzy: Expanded Area
Developed traffic zone system (98 zones)
For each zone, surface areas by land use type estimated from Google Earth and MS Virtual Earth
Applied ITE Trip rates to generate zone productions and attractions
Distributed trips using logit model with unitary coefficients

17. TFlowFuzzy: Expanded Area
Assigned initial trip table to network in VISUM
Applied TFlowFuzzy procedure
Assigned adjusted trip table to network in VISSIM
Compared simulated flows to observed values
Final trip table represents existing conditions
Base to which development traffic is added

18. TFlowFuzzy: Analysis Results
-1% 8% 8% 5%
5% 3%
-4% 9%

19. Application of TFlowFuzzy Trip Table
Trip table and site specific development traffic assigned to VISSIM network with road closures and two-way street conversions
Provided intersection levels-of-services throughout the network
Allowed for the evaluation of several network scenarios.

20. Application of TFlowFuzzy Trip Table
Base Case – Existing One-way Network

21. Application of TFlowFuzzy Trip Table
Alternative – Complete Two-way Network

22. Way to Improve Method Refine trip generation and distribution method
Improve function for trip distribution
Consider gravity model
Review weightings of gateway zones
Refine trip generation through more detailed land use data
City records to obtain floor space or other statistics for land use if available

23. Conclusions
Trip tables synthesized using TFlowFuzzy provided adequate correlation between observed and modelled conditions
Method provides reasonable approach when no survey data or macro-level model is available