Trips by Distance

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Trips by Distance

How many people are staying at home? How far are people traveling when they don’t stay home? Which states and counties have more people taking trips? The Bureau of Transportation Statistics (BTS) now provides answers to those questions through our new mobility statistics.

The Trips by Distance data and number of people staying home and not staying home are estimated for the Bureau of Transportation Statistics by the Maryland Transportation Institute and Center for Advanced Transportation Technology Laboratory at the University of Maryland. The travel statistics are produced from an anonymized national panel of mobile device data from multiple sources. All data sources used in the creation of the metrics contain no personal information. Data analysis is conducted at the aggregate national, state, and county levels. A weighting procedure expands the sample of millions of mobile devices, so the results are representative of the entire population in a nation, state, or county. To assure confidentiality and support data quality, no data are reported for a county if it has fewer than 50 devices in the sample on any given day.

Trips are defined as movements that include a stay of longer than 10 minutes at an anonymized location away from home. Home locations are imputed on a weekly basis. A movement with multiple stays of longer than 10 minutes before returning home is counted as multiple trips. Trips capture travel by all modes of transportation. including driving, rail, transit, and air.

The daily travel estimates are from a mobile device data panel from merged multiple data sources that address the geographic and temporal sample variation issues often observed in a single data source. The merged data panel only includes mobile devices whose anonymized location data meet a set of data quality standards, which further ensures the overall data quality and consistency. The data quality standards consider both temporal frequency and spatial accuracy of anonymized location point observations, temporal coverage and representativeness at the device level, spatial representativeness at the sample and county level, etc. A multi-level weighting method that employs both device and trip-level weights expands the sample to the underlying population at the county and state levels, before travel statistics are computed.

These data are experimental and may not meet all of our quality standards. Experimental data products are created using new data sources or methodologies that benefit data users in the absence of other relevant products. We are seeking feedback from data users and stakeholders on the quality and usefulness of these new products. Experimental data products that meet our quality standards and demonstrate sufficient user demand may enter regular production if resources permit.


NameSocrata field nameColumn name in sgr mountData typeDescription
DatedatedateCalendar dateDate
State Postal Codestate_codestate_codeTextState postal code
Row IDrow_idrow_idTextUnique row identifier
Number of Trips 250-500trips_250_500trips_250_500NumberNumber of trips by residents greater than 250 miles and shorter than 500 miles (250 ≤ trip distance < 500 miles)
State FIPSstate_fipsstate_fipsTextTwo-digit FIPS state code
County FIPScounty_fipscounty_fipsTextFive-digit FIPS county code
Number of Trips 3-5trips_3_5trips_3_5NumberNumber of trips by residents greater than 3 miles and shorter than 5 miles (3 ≤ trip distance < 5 miles)
County NamecountycountyTextCounty name
Population Not Staying at Homepop_not_stay_at_homepop_not_stay_at_homeNumberNumber of residents not staying at home
Number of TripstripstripsNumberNumber of trips made by residents, i.e., movements that include a stay of longer than 10 minutes at an anonymized location away from home.
Number of Trips 5-10trips_5_10trips_5_10NumberNumber of trips by residents greater than 5 miles and shorter than 10 miles (5 ≤ trip distance < 10 miles)
Number of Trips 10-25trips_10_25trips_10_25NumberNumber of trips by residents greater than 10 miles and shorter than 25 miles (10 ≤ trip distance < 25 miles)
Number of Trips >=500trips_500trips_500NumberNumber of trips by residents greater than 500 miles (trip distance ≥ 500 miles)
LevellevellevelTextIndicates National, State, or County level metrics
Population Staying at Homepop_stay_at_homepop_stay_at_homeNumberNumber of residents staying at home, i.e., persons who make no trips with a trip end more than one mile away from home
Number of Trips <1trips_1trips_1NumberNumber of trips by residents shorter than one mile
Number of Trips 1-3trips_1_3trips_1_3NumberNumber of trips by residents greater than one mile and shorter than 3 miles (1 ≤ trip distance < 3 miles)
Number of Trips 25-50trips_25_50trips_25_50NumberNumber of trips by residents greater than 25 miles and shorter than 50 miles (25 ≤ trip distance < 50 miles)
Number of Trips 50-100trips_50_100trips_50_100NumberNumber of trips by residents greater than 50 miles and shorter than 100 miles (50 ≤ trip distance < 100 miles)
Number of Trips 100-250trips_100_250trips_100_250NumberNumber of trips by residents greater than 100 miles and shorter than 250 miles (100 ≤ trip distance < 250 miles)

Upstream Metadata