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Overview of the Focus Model for Travel Scenario Creation and Running

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rafe
17 diapositives · 326 Views · Jul 28, 2014

This document summarizes the Focus Model from the Denver Regional Council of Governments, focusing on its operation and steps involved in travel scenario creation. It outlines the model's stages, including GISDK processing, trip generation, mode choice, and tour simulations. Key components include inputs for destination choices and priority assignment, illustrating how daily travel choices are generated based on individual circumstances. The document serves as a guide for understanding and running the Focus Model effectively.

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  1. Focus Model OverviewCLASS FOUR Denver Regional Council of Governments July 7, 2011

  2. Tentative Schedule Model Steps July 7 Final Model Steps/ How to Run the Model July 14 Theoretical Underpinning July 21(Erik) Model Steps/ SQL Database July 28 ???? August 4 Should we continue after this?

  3. Classes are posted on the website • http://www.drcog.org/index.cfm?page=FocusTechnicalResources • Or googleFocus travel model

  4. Brief Interlude in the Model Steps to show operations of model • This will probably change. • Show scenario creation & scenario running. • Questions

  5. Focus Model Flow: 28 Steps Outside The Speed Feedback Loop: Run Once- STAGE 1 GISDK called from C#: GISDK Preprocess Java: 3. Population Synthesizer C# 4. PopSyn Output Processor 5. Size Sum Variable Calculator STAGE 2 GISDK called from C#: For DIA, I-E, E-E and Commercial Trips 1. DRCOG Multi-Period Highway Preprocess 2. DRCOG Multi-Period Transit Preprocess 3. DRCOG Transit Preprocess 4. Trip Generation 5. Highway and Transit Skimming 6. Trip Distribution 7. Mode Choice STAGE 3 C# Regular Trips 8. Regular Work Location Choice 19 . Tour Main Mode Choice 9. Regular School Location Choice 20. Tour Time of Day Choice 10. Auto Availability 21. Intermediate Stop Generation 11. Aggregate Logsum Generation 22. Trip Time of Day Simulation 12.Daily Activity Pattern 23. Trip Time Copier 13. Exact Number of Tours 24. Intermediate Stop Location 14.Work Tour Destination Type 25. Trip Mode Choice 15.Work-Based Subtour Generation 26. Trip Time of Day Choice 16. Tour Time of Day Simulation 27. Write Trips to TransCAD 17. Tour Primary Destination Choice 18. Tour Priority Assignment STAGE 4 GISDK called from C#: 28. Highway and Transit Assignment FEEDBACK

  6. Focus Model Flow FEEDBACK

  7. Long term choices made • Each individual has regular work location, school location. We know how many cars a household has and how it accessible it is to various types of services. • Now we need daily choices for travel. How many trips will each person take and for what purposes?

  8. Next we generate tours and information about location, mode, and time. HOME WORK STORE

  9. Tour Generation Models • We generate a number of tours for seven purposes. We find out if each person has stops for each purpose • Then we look at if people go to their regular workplace or someone else. We see how many work-based subtoursthey take.

  10. Tours get written into the database.

  11. Now we need to know more information about the tours 16. Tour Time of Day Simulation (When) 17. Tour Primary Destination Choice (Where) 18. Tour Priority Assignment (Priority) 19 . Tour Main Mode Choice (Mode) 20. Tour Time of Day Choice (Time)

  12. Tour Time of Day Simulation • Tour Time of Day Simulation: Type of Model = Monte Carlo • This is a weird one! • Before we pick where a person goes and which mode they use on a tour we need a skim time period to pick from to choose how long it takes • We use a weighted random assignment of the TOUR DESTINATION ARRIVAL TIME/ TOUR DESTINATION DEPARTURE TIME based on the purpose of the tour.

  13. Tour Time of Day Choice Example HOME WORK Arrive at Tour Primary Destination at 8 am, Leave at 5 PM STORE Then the tour gets assigned, the AM Peak skim for 8 am on the outbound, and the PM peak skim on the inbound tour half

  14. Let’s talk about ourselves again (volunteer) Other than for work or school, where do you go (to the level of detail of an X-Y coodinate) on a typical weekday? Why? What variables about you, the transporation network, where you live, or where you work determine this?

  15. Tour Primary Destination Choicethis is hard! • Predicts: Zone and X,Y Location of Tour Primary Destination • Model Type: Multinomial Logit • Inputs: (what do you think) Tour Purpose Number of Jobs by Type Tour Time of Day Number of Jobs by Type Person Age Income Distance/Accessibility from Home to Destination

  16. Then we know where the tour starts and ends.

  17. Tour Priority Assignment • What is the rank order of the tours in your day? From most important to least important. • This helps determine which tours get their mode and time assigned first. • For example for full time workers, the most important tour is the first one to work. For students, it’s the first one to school.