Disaggregate Disaggregate State Level State Level Freight Data to Freight Data to County Level County Level October 2013 Shih-Miao Chin, Ph.D. Ho-Ling Hwang, Ph.D. Francisco Moraes Oliveira Neto, Ph.D. Center for Transportation Analysis Oak Ridge National Laboratory
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Disaggregate State Level Freight Data to County Level
Disaggregate State Level Freight Data to County Level. October 2013 Shih-Miao Chin, Ph.D. Ho-Ling Hwang, Ph.D. Francisco Moraes Oliveira Neto, Ph.D. Center for Transportation Analysis Oak Ridge National Laboratory. Outline. Background Freight Analysis Framework (FAF) Major data sources - PowerPoint PPT Presentation
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Disaggregate Disaggregate State Level State Level Freight Data to Freight Data to County LevelCounty Level
October 2013
Shih-Miao Chin, Ph.D.Ho-Ling Hwang, Ph.D.Francisco Moraes Oliveira Neto, Ph.D.Center for Transportation AnalysisOak Ridge National Laboratory
OutlineOutline
Background Freight Analysis Framework (FAF) Major data sources
Methodology Disaggregation process Example
Results & Validations FAF Ton-miles Comparison with other freight data programs
Manages by the Office of Freight Management and Operations, Federal Highway Administration (FHWA)
Provides a comprehensive picture of freight movement among states and major metropolitan areas by all modes
Most current release is FAF3.4 database
South, Central & Western Asia
Eastern Asia
Mexico
Europe
Africa
Canada
Rest of Americas
Mexico
SE Asia & Oceania
Eastern Asia
SW & Central Asia
Geography 123 domestic regions 8 foreign regions
Modes of transportation Truck Rail Water Air/air-truck Multiple mode/mail Pipeline Others/unknown
43 Commodities
Background: Background: Major Data SourcesMajor Data Sources
Commodity Flow Survey (CFS) Conducted under the partnership of U.S. Census and Bureau of Transportation
Statistics (BTS) Sample survey of business U.S. establishments & classified according to North
American Industry Classification System (NAICS) codes Latest available data: 2007 (i.e., base year data for FAF3)
County Business Patterns (CBP) An annual data series from U.S. Census Provides economic data by industry (# establishments, employment, payroll) Latest available data: 2011
Industry Input-Output (I-O) Accounts Annual I-O tables produced by the Bureau of Economic Analysis (BEA) Make and Use Tables, by industry according to NAICS codes Latest available data: 2011
FAF3 Disaggregation: FAF3 Disaggregation: Estimation of Ton-MilesEstimation of Ton-MilesTonnage and value of goods moved are important measures of the freight
activity, but they do not necessarily reflect the usage of transportation systems Environmental impact (emissions and fuel efficiency) of freight activity can be
assessed using measures normalized by ton-miles
The revenue of transportation firms is related to the amount of freight in tones transported per mile
Main disaggregation steps Linking freight activities with economic activities
Disaggregate FAF3 database (ODCM tonnage matrix) to county level
Estimate average shipment distance by mode on the multimodal network systems
ωOrigin county / Commodity, Mode ωDestination county / Commodity, Mode
ωcounty-to-county by commodity & mode
ProductionCBP
Information theory
o d
i j
Where (o, d) – FAF OD pair & (i, j) – County pair
f FAF zone-to-zone, Commodity, Mode
AttractionCBP BEA I-O Accounts (apq)
ωO/ C, M = ∑ωO / I ωI / C, M ωD/ C, M = ∑ωD / I ωI / C, M
Methodologies/ModelsMethodologies/ModelsLog-linear regression models for linking freight activity with economic
activity by industry sector at stateProduction: freight tonnage shipped & payroll of producing industryAttraction: freight tonnage received & payroll of receiving industry
Estimates of county-level production/attraction shares by industrySpatial distribution by matrix balancing procedures (or doubly constraint
gravity model)
0 1000 2000 3000 4000 5000 6000 70000
1
2
3
4
5
6
7
8
9x 10
4
Payroll of food manufacturing by state (millinos of dollars)
To
tal
ton
s sh
ipp
ed b
y s
tate
(th
ou
san
ds)
Production curve for food manufacturing
y = 6.52x1.09
R2 = 0.85
Distance MatricesDistance Matrices
Terminal links
Terminal Access/ Egress Links
Origin of movement
Highway access link
Highway Network #1
Highway Network #2
Rail Network
Movement destination
http://cta.ornl.gov/transnet/
Highway: Contains 500,000 miles of roadway in the US, Canada, and Mexico
Railway: Contains every railroad route in the US, Canada, and Mexico that has been active since 1993