FOCUS MODEL OVERVIEWCLASS FOURDenver Regional Council of GovernmentsJuly 7, 2011

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

Classes are posted on the website http://www.drcog.org/index.cfm?page=F

ocusTechnicalResources

Or google Focus travel model

Brief Interlude in the Model Steps to show operations of model

This will probably change. Show scenario creation & scenario

running. Questions

Focus Model Flow: 28 StepsOutside The Speed Feedback Loop: Run Once-STAGE 1GISDK called from C#:GISDK PreprocessJava:3. Population SynthesizerC#4. PopSyn Output Processor5. Size Sum Variable Calculator

STAGE 2 GISDK called from C#:For DIA, I-E, E-E and Commercial Trips1. DRCOG Multi-Period Highway Preprocess 2. DRCOG Multi-Period Transit Preprocess3. DRCOG Transit Preprocess4. Trip Generation5. Highway and Transit Skimming6. Trip Distribution7. Mode Choice

STAGE 3 C# Regular Trips8. Regular Work Location Choice 19 . Tour Main Mode Choice 9. Regular School Location Choice 20. Tour Time of Day Choice10. Auto Availability 21. Intermediate Stop Generation11. Aggregate Logsum Generation 22. Trip Time of Day Simulation12.Daily Activity Pattern 23. Trip Time Copier13. Exact Number of Tours 24. Intermediate Stop Location14.Work Tour Destination Type 25. Trip Mode Choice15.Work-Based Subtour Generation 26. Trip Time of Day Choice16. Tour Time of Day Simulation 27. Write Trips to TransCAD17. Tour Primary Destination Choice18. Tour Priority Assignment

STAGE 4 GISDK called from C#:28. Highway and Transit Assignment

FEEDBACK

Focus Model FlowSTAGE 1:

Make Population

And Network

STAGE 2:Run GISDK to Mode Choice

STAGE 3: C#

Logit Models to

Create Trips

STAGE 4: GISDK

Assignment

FEEDBACK

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?

HOME WORK

STORE

Next we generate tours and information about location, mode, and time.

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 subtours they take.

Tours get written into the database.

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)

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.

Tour Time of Day Choice Example

HOME

STORE

WORK

Arrive at Tour Primary Destination at 8 am,Leave at 5 PMThen the tour gets assigned, the AM Peak

skim for 8 am on the outbound, and the PM peak skim on the inbound tour half

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?

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 PurposeNumber of Jobs by TypeTour Time of DayNumber of Jobs by TypePerson AgeIncomeDistance/Accessibility from Home to Destination

Then we know where the tour starts and ends.

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.