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The National Household Travel Survey. Heather Contrino US Department of Transportation Federal Highway Administration. About the NHTS…. Only national data source on travel demand and travel behavior of the American public. Measures travel by US households for all modes and all purposes

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The National Household Travel Survey

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The national household travel survey

The National Household

Travel Survey

Heather Contrino

US Department of Transportation

Federal Highway Administration


About the nhts

About the NHTS…

  • Only national data source on travel demand and travel behavior of the American public.

  • Measures travel by US households for all modes and all purposes

  • Survey conducted since 1969


Nhts uses a classic travel diary as a memory jogger

NHTS uses a classic travel diary as a memory jogger…


And obtains trips from one address to another by all modes

And obtains trips from one address to another by all modes…


Nhts core data content

NHTS Core Data Content

  • Households

  • Persons

  • Geography

  • Vehicles

  • Trips

Major Contribution

Linkage between people,

travel and vehicles


2008 nhts provides trends over 40 years of core content

2008 NHTS provides trends over 40 years of core content…


New 2008 nhts content

New 2008 NHTS Content

  • Congestion

    • Interstate use and tolling

    • Telecommuting – opportunity and frequency

    • Work arrival time and flexibility

  • Safety

    • Safe Travel to School

    • Travel impacts of disability

  • Energy and Environment

    • Shopping by Internet and deliveries to the household

    • Hybrid/Alternative fuel vehicles

    • Fuel costs by vehicle type and travel behavior

  • Intermodalism

    • Access, egress, and travel party size

    • Frequency of walk and bike

    • Motorcycle ownership and use


The nhts program

The NHTS Program

  • National Study

    • Serves the department, congress, and administration

    • Resource for State and metropolitan areas (MPOs) and transportation community

    • 40 years of trend data on U.S. travel behavior

    • Sample size of 25,000 households

  • Add-On Program

    • Service to States and MPOs since 1990

    • Allows States and MPOs to purchase additional samples for their local area

    • Program participation has doubled every survey year

      (Sample size of 125,000 households for 2008)

2008 NHTS Travel Data for 150,000 Households


2008 add on program

2008 Add-On Program

125,000 Add-On Samples

Vermont DOT

Wisconsin DOT

South Dakota DOT

New York State DOT

Cedar Rapids, IA

Iowa DOT

Indiana DOT

Omaha, Nebraska

California DOT

Virginia DOT

North Carolina DOT

Tennessee DOT

Piedmont Region

Maricopa, AZ

South Carolina DOT

Pima, AZ

Georgia DOT

Texas DOT

Florida DOT


The national household travel survey

2008 NHTS Schedule

  • April 2009 - Data collection completed

  • June 2009 - Final unweighted data for QA

  • August 2009 - Add-On GIS files

  • August 2009 – Draft final weighted file for QA

  • October 2009 – Final weighted data and documentation

    • Add-Ons receive final data

  • January 2009 – Public use data set

    • On-line analysis tool available for 2008

  • March 2009 – Final full documentation and users guide


The national household travel survey

How can NHTS help you?


Identifying trends in demand

Identifying Trends in Demand

Huge growth in travel since 1969, however demand (number of trips) has leveled off over the past decade

Base: NHTS data series, travelers 16+


Understanding mode use

Understanding Mode Use

Purpose Distribution of Transit Trips

Source: 2001 NHTS


For interpreting and using jtw looking at mode loyalty

For interpreting and using JTW looking at mode loyalty:


Measure how access impacts behavior

Measure how access impacts behavior…

Source: NHTS series since 1969


Quantify the link between demographics and mobility

Quantify the link between demographics and mobility

This is the daily range of travel for a high income African American

This is the daily range of travel for a low-income African American


And demographics and safety

And demographics and safety…

Base: NHTS data on driver miles by age and FARS fatalities


See how the transportation system works together

See how the transportation system works together

Source: 2001 NHTS


And when and why people drive

Commute

Fam/Pers (inc. Shop)

School/Ch

Soc/Rec

14,000

12,000

10,000

8,000

Person Trips in Millions

6,000

4,000

2,000

0

1

2

3

4

5

6

7

8

9

10

11

12

1

2

3

4

5

6

7

8

9

10

11

Start Hour

And when and why people drive


To look at changes in the fleet mix

To look at changes in the fleet mix…

Hybrid/Alternative Fuel Vehicles by State

Source: NHTS 2008 preliminary


And forecast future demand

And forecast future demand

Estimated on current VMT/person from NHTS and Census population forecast


The national household travel survey

How other areas use the NHTS…


Safety planning california

Safety Planning - California

Pedestrian Fatalities per Mile of Exposure

Source: 2001 FARS pedestrian Fatalities and NHTS 2001 miles walked


Model calibration wisconsin

Model Calibration - Wisconsin

HBW Observed Vs Predicted Trip Length Frequency

Source: 2001 NHTS Bruce Aunet, WI DOT & Cambridge Systematics Inc.


Air quality new york

Air Quality - New York

Vehicle Starts, Trip Lengths by Time of Day and Vehicle Utilization

Source: 2001 NHTS


The national household travel survey

Performance Measures - Virginia

Mode

Trip Length Distribution

Trips by time of day

Source: 2001 NHTS


Special studies florida

Special Studies - Florida

  • Hurricane Evacuation Planning

  • Weekend and Holiday Travel Planning

  • Event Planning

  • Seasonal Resident Impact


Nhts products

NHTS Products

  • State Profiles

  • Policy Briefs

  • Trends Database

  • Transferability

  • On-line Analysis Tool

  • Risk Assessment Tool

    • AAA Traffic Safety Foundation

NHTS

Trends

CD-ROM


Accessing nhts products

Accessing NHTS Products

Contact Heather Contrino, FHWA

  • State Profiles

  • Policy Briefs: http://ornl.gov/publications.shtml#issueBriefs

  • Trends Database: To be posted soon

  • Transferable data for trip generation

    • http://fmip.ornl.gov/nhts/

  • Risk Assessment Tool:

    • http://www.aaafoundation.org/trafficSTATS/

  • On-line Analysis Tool: http://nhts.ornl.gov

    • SAS Data Set: http://nhts.ornl.gov/download.shtml


The national household travel survey

Thank You!

Heather Contrino

[email protected]


The national household travel survey

Future Program Goals

  • Methods

    • Coverage and Response Rates

      • Cellular phones and non-contacts

  • Periodicity

    • Real time reporting environment

    • Continuous study design/annual reporting

  • Relevant Content

    • Establishing regular, reliable performance measures

    • Maintaining trends while addressing new policy and planning questions


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