national modeling trb transportation planning applications conference may 5, 2013
DESCRIPTION
FHWA initiatives Long-distance survey research Origin- destination matrix estimation National travel model exploratory research Freight Analysis Framework (FAF) National networks (NHPN / HPMS)TRANSCRIPT
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
Jeremy RawFHWA Office of Planning