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National Household Travel Survey Data User Tools. Adella Santos FHWA-OFFICE OF HIGHWAY POLICY INFORMATION APDU 2008 ANNUAL CONFERENCE SEPTEMBER 25, 2008. Today’s Presentation. Public data: Purpose for Planning and Policy About the NHTS Data Travel Trends Data Content and data sets

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National Household Travel Survey Data User Tools

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National Household Travel SurveyData User Tools

Adella Santos

FHWA-OFFICE OF HIGHWAY POLICY INFORMATION

APDU 2008 ANNUAL CONFERENCE

SEPTEMBER 25, 2008


Today’s Presentation

  • Public data: Purpose for Planning and Policy

  • About the NHTS Data

  • Travel Trends

  • Data Content and data sets

  • Uses and Users

  • Data Products and User data Tools


About the NHTS Data…

  • National Study on travel of the American Public

  • Add-On Program for States and metropolitan areas.

  • 40 Years of Travel Data

    • 1969, 1977, 1983, 1990, 1995, 2001, 2008

  • Link between demographics, travel and vehicles.

  • Widely used inside and outside the transportation research, planning and policy communities.


Planning and Policy: How do we get from here to there?

v

Use of a travel diary


What do we ask? Core Travel

Data Content

  • Household demographics (composition and income)

  • Person (Age, race, sex, ethnicity, worker & students status, citizenship, education)

  • Geography (urban, rural, suburban, state and national analyses)

  • Vehicles (Make, model, year, mileage alternative fuels)

  • Trips/Commute information (mode, occupancy, time of departure, purpose, work location and occupation, distance trip length)


Travel Data Depends on:

For Each Vehicle:

Make (Hybrid/Alternative fuel)

Model

Age (year)

How long owned*

For Each Household:

Number of people

Number of drivers

Number of workers

Number of vehicles

Income

Race and Ethnicity

For Each Person:

Age

Gender

Driver status

Worker Status

Annual Miles

Daily Travel Data:

Purpose

Mode

Start/End time

Distance

Vehicle Occupancy

Interstate use


Trends in Travel Content: 2008 New and Improved Data

  • Shopping by Internet and deliveries to the household

  • Frequency of self-employed and work at home instead of traveling to workplace

  • Flexibility of arrival time at work Vehicle Make and model, whether hybrid or alternate fuel used

  • Travel to school detail to support Safe Routes to School program

  • Whether trip included travel on freeway/interstate and whether a toll was paid


Internet shopping and the impact of purchases being delivered


In 2001 we started to see a relationship on internet use and travel…

Source: Contrino and McGuckin paper to be submitted TRB 2008


Other sources show increased household purchases on-line…

Average Number of On-Line Purchases per Month

Source: USPS HDS data


What are the effects on system use?

  • More Truck in Residential areas:

  • Congestion impacts

  • Safety Issues

  • Economic impacts


Trend Issue: Fleet Penetration and use of Hybrid/Alternative fuel Vehicles

  • Since 1969 we have collected fleet characteristics (make/model/age of vehicle)

  • Since 2001, added value of vehicle efficiency (mpg) and gas cost

  • 2008, added Hybrid and alternate fuel use


Fleet Characteristic and fuel cost are changing


The Average Vehicle is 9 Years Old.

Source: NHTS Data Series, 1977 - 2001


NHTS 2001 and 2008 Data Sets

  • 2001 NHTS

  • - Household data set: 69,817 records, 188 variables

  • - Person data set: 160,758 records, 142 variables

  • - Daytrip data set: 642, records, 150 variables

  • - Vehicle data set: 139, 382 records, 92 variables

  • - 3 replicate weight files: each has 398 variables

  • - Contains 239 derived variables.

  • 2008 NHTS

  • - 150,000 Households (25,000 national Sample and 125,000 Add-On sample).


Major Users and Uses

Users

Uses

System Use Measures (congestion, Urban/rural)

Travel Characteristics (Trends & Forecasting)

Mode Use for Transit Planning, Bike/Pedestrian,

Safety (Exposure rates)

  • Federal (DOT)

  • Federal (Non DOT)

  • State DOT

  • MPOs

  • Universities

  • Research Entities


Other Measures

  • Provides data for forecasting and air quality analysis.

  • Tracks changes in fleet characteristics and use (e.g. Hybrids vehicles and effects of rising gas prices on travel)

  • Marks the effect of new technology/uses on travel behaviors (e.g. internet shopping and deliveries to homes.)

  • Policy effects in Travel (e.g. work at home workers with flexible arrival time.)

  • Rich in Demographics (e.g. travel demands specific population groups such as immigrants, elderly, school children, low income)


NHTS Products

  • PUBLICATIONS:

  • Policy Briefs

  • State Profiles

  • Summary of Travel Trends

  • Our Nation’s Travel: Current Issues

  • Data Trends Data Set: 1990, 1995, 2001

  • Data Tools

  • NHTS Website: http://nhts.ornl.gov (Community of exchange)

  • On Line Analysis Tool

  • Transferability Tool


NHTS Policy Briefs


State Profiles


NHTS Website: http://nhts.ornl.gov.


Please visit our website: http://nhts.ornl.gov


Transferability Data Tool


Accessing NHTS Products

  • State Profiles

  • Summary of Travel Trends and Our Nation’s Travel: Current Trends

  • Trends Database: CD

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

  • Transferability

    • http://fmip.ornl.gov/nhts/

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

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


National Household Travel Survey

Thank You!

[email protected]


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