STATEWIDE ANALYSIS MODEL (SAM-V3) · Janie Temple . SAM-V3 Planning Conference Presentation – June 4, 2014 Introduction ... –First version of SAM that aligns with a census year

SAM-V3 Planning Conference Presentation – June 4, 2014

STATEWIDE ANALYSIS MODEL (SAM-V3) June 5, 2014

Janie Temple


Introduction

Brief SAM History

Intro to SAM-V3 functionality

Past and Current SAM projects

Future additions to SAM

Suggestions from model users

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SAM-V1: Completed 2004 ◦ Base year 1998

◦ Forecast year 2025

◦ No built in capabilities for interim year or toll analysis


◦ Interim and forecast years 2010, 2020, 2030, and 2035

◦ Incorporated intercity toll analysis capabilities

◦ Added the TX-NAFF freight model component


◦ Interim and forecast years 2010, 2020, 2030, and 2040

◦ Interpolated non-standard years supported

Background of SAM

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TxNAFF Integration

Estimated Rail Tonnage Capacity

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SAM-V3 Update: General Changes

Future road projects as of SAM-V3

All networks were reviewed and updated with current MPO plans

◦ Fiscally constrained projects have changed

drastically since last update

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SAM-V3 Update: General Changes

Updated to run in

TransCAD 6.0

More detail in

neighboring states

Incorporated recent Workplace Surveys to

improve the attraction model

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SAM-V3 Update: Revalidation of SAM-V3

SAM-V3 was revalidated to a new 2010 base year – Benefits from newly available data such as 2010

census and the latest available urban area demographics

– First version of SAM that aligns with a census year

Forecast years: 2020, 2030, 2040 Used validation criteria from Travel Model

Improvement Program’s (TMIP) Validation Manual

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SAM-V3 Update: Automate Multimodal Assignment

In SAM-V2, all preliminary steps for the transit, HSR, rail and air were completed in the SAM run

Completing assignment took several extra steps

In SAM-V3, these steps were integrated into model run

Improvements:

◦ Simplified these model runs

◦ Fewer assumptions made

◦ Increased consistency and

repeatability of results

Freight and Pass. Rail

Air Links

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SAM-V3 Update: Demographics Interpolation

2010 2020 2018?

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SAM-V3 Update: Demographics Interpolation

SAM-V3 includes a full demographics interpolation tool ◦ For any year between 2010 and 2040

Enhances consistency between different users and projects ◦ Create a “level playing field” as a starting

point for studies using SAM

Adjustments not ‘set in stone’, but subject to the judgment of the modeler

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SAM-V3 Mode Alternatives

Drive alone, Shared

ride 2, and Shared ride 3+

Urban bus and

Urban rail

Intercity rail with drive,

rail, and walk access

High speed rail with drive, rail,

and walk access

Highway modes Urban transit

Intercity modes

Air with drive, rail, and bus access

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Past and Current SAM Use

TxDOT is currently planning

High Speed Intercity

Passenger Rail

Stated Goals:

Speeds 150mph+

Connections to airports, city

centers, other rail stations

Using features incorporated into

SAM-V3 in the recent update

Many routes being considered,

including Oklahoma City to

Laredo or the Valley

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Two additional High Speed

Rail projects are using SAM:

o the Houston-Dallas

corridor study and

o the Dallas-Fort Worth

corridor study

Located partially along the

federally-designated South

Central High-Speed Rail

Corridor

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Lone Star Rail District

Project 1 (Jacobs Engineering): Analysis of Passenger Flows in Austin-San Antonio Corridor

◦ LSTAR study focusing on analyzing the ridership if

Union Pacific ROW parallel to I-35 were converted

to passenger rail

Project 2 (Atkins Global): Analysis of Freight (Truck and Rail) Flows in the same corridor

◦ Primarily focused on the effects of freight rail

relocation – as road/fuel costs increase

◦ Currently studying new freight line further east –

between Taylor and Seguin – evaluating many options

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Lone Star Rail District

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Rural Transportation

Plan (Atkins Global)

◦ Adopted June 28th,

2012

◦ Used to identify and

rank the Top 3

Projects per District

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Rural Transportation Plan (Atkins Global)

Rankings were based on

All rural projects that

would add capacity

were input in SAM

Travel time

improvement, V/C &

LOS were calculated

for each

Commodity flow (in

annual tonnage of truck

freight) from SAM was

also a factor

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I-69 Innovative Finance

Multi-state effort

looking into the

financing of I-69

Internally tested a

segment from

Texarkana to Marshall

to determine potential

future volumes

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Past and Current SAM-V3 Use

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Project Lead

IH 10 Scenario testing Jacobs Engineering

Passenger and freight modeling – Texas Freight Plan HDR Engineering

Texas Freight Plan CDM Smith and Atkins Global

IH 35 to SH 130 Connector Study Alliance Transportation Group

Groundwork for Dynamic Traffic Assignment development Center for Transp. Research

Transloading/Intermodal Feasibility Study for Rio Grande COG Parsons Brinckerhoff

Texas Transportation Plan Update CH2M Hill

South Padre 2nd Causeway and toll revenue studies CDM Smith


Future SAM Changes: Incorporate Urban Models

The areas with the greatest need for more detail are

the urban model areas

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Future SAM Changes: Incorporate Urban Models

Potential for improvements:

– Greater accuracy of results in the urban area

– More overall sensitivity to changes

– Greater toll sensitivity

Would allow more consistency when comparing

results of regional and statewide levels

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Notes to users

All networks, TAZs, demographics, and the mode choice

model have been checked and updated to the extent

possible for statewide datasets.

However, every project is different and takes place in a

different location at a different scale.

Professional judgment and local knowledge should be

used to refine any aspect of the model to better suit the

needs of the study.

These model changes need to be provided to TPP after

project completion for possible addition into the model.

SAM is a platform

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Statewide Analysis Model

Suggestions for future enhancements to SAM are welcome

[email protected] [email protected] Questions/Comments?

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mailto:[email protected]

mailto:[email protected]

Documents

STATEWIDE ANALYSIS MODEL (SAM-V3) · Janie Temple . SAM-V3 Planning Conference Presentation – June 4, 2014 Introduction ... –First version of SAM that aligns with a census year