national modeling trb transportation planning applications conference may 5, 2013

National Modeling

TRB Transportation Planning Applications ConferenceMay 5, 2013

Why national modeling?

National trends: mode choice and mode shift Infrastructure demand Travel crossing state lines Nationally significant travel corridors Energy and vehicle emissions Facilitate debate and implementation of

transportation legislation Providing anchor data for state external-internal

and external-external trips

FHWA initiatives

Long-distance survey

research

Origin-destination

matrix estimation

National travel model

exploratory research

Freight Analysis

Framework (FAF)

National networks (NHPN / HPMS)

Recognized need for updated long-distance travel survey, but cost prohibitive

Explore new methods, commercial data vendors

Consider data requirements for future long-distance survey

Long-distance survey

research

Annual business and leisure passenger trips by mode for 2008 and 2040

More zones equals larger matrix, more challenging to estimate accurately

Developed zones based on FAF with special generators

Origin-destination

matrix estimation

National picture of freight flows and baseline forecasts to support policy studies

Tonnage and value of regional freight flows by commodity and mode for 2007, with forecasts to 2040

Assignment of tons to freight-hauling trucks on individual highway segments

123 domestic regions

Freight Analysis

Framework (FAF)

“Big picture” Putting the pieces together Consider model output What are data needs? Develop estimation methods Think outside the box, but

make sure it can run!

National travel model

exploratory research

HPMS 8 based on linear referencing system (LRS)

Current NHPN for geospatial visualization of transportation features

Relate HPMS, NHPN, and FAF

Create a routable network Important for modeling

vehicle and goods movement on roads

National networks (HPMS/ NHPN)

What are your needs?

Brad GudzinasFHWA Office of Highway Policy Information

brad.gudzinas@dot.gov

Jeremy RawFHWA Office of Planning

Jeremy.raw@dot.gov