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Access Across America: Transit 2022 Data

Owen, Andrew
Liu, Shirley Shiqin
Jain, Saumya
Hockert, Matthew
Lind, Eric
2024-10-21
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Persistent link to this item

https://doi.org/10.13020/gjp7-4y32
 https://hdl.handle.net/11299/266461
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Collection period

2022-01-01
2022-12-31

Date completed

2024-09-15

Date updated

Time period coverage

Geographic coverage

Source information

Journal Title

Journal ISSN

Volume Title

Title

Access Across America: Transit 2022 Data

Published Date

2024-10-21

Authors

Group

University of Minnesota Center for Transportation Studies, Accessibility Observatory

Author Contact

Owen, Andrew
owenx148@umn.edu

Type

Dataset
Spatial Data
Other Dataset

Abstract

These data were created as part of a study that examines the accessibility to jobs by transit across the United States. It is the most detailed evaluation to date of access to jobs by transit, and it allows for a direct comparison of the transit accessibility performance of America's metropolitan areas. These data are part of a longitudinal study. Transit data for additional years can be found in the Accessibility Observatory Data collection: https://hdl.handle.net/11299/200592

Description

This dataset provides a summary of the worker-weighted access by different census geography levels and travel times for each state. The worker-weighted access here represents the average number of jobs a person can reach from a specific census area within a given travel time threshold, using a combination of walk/roll plus public transit. The travel time threshold are in integer minutes, at five-minute intervals from 5 min to 60 min (1 hour). For transit accessibility, the match between schedule and departure time greatly influences what is reachable. We use available published transit schedules for a given travel day, and calculate access based on the median (50%) travel time between origin and destination across each minute from 7am to 9am. This removes some of the variation due to mismatch of departure. Transit access travel times include walking or rolling to and from stops, as well as waiting. Where no applicable transit service is available, the accessibility metric represents jobs available by walking or rolling. Census levels included in this dataset are: Block, Block Group, Census Tract, County, and State. The file-naming system for the data files is [state]_[statecode]_[mode]_[census_level]_[year].csv: These files contain the census level data by mode, year. **Important Note: Due to its large size, the 'Block' level data file should not be opened outside of a person's coding platform. Attempting to open this file in Excel or a similar spreadsheet program would cut off a significant amount of data points.** Data fields included in the data are: 1. mode: the type of travel modes, one of auto, bike, or transit; 2. year: National Accessibility Evaluation data year, the year for which this dataset is relevant; 3. parent_area: the ID of the containing geography within which the data averages are calculated; 4. summary_level: the level of geography at which averages are calculated - one of state, county, census tract, block group, or block; 5. geoid: the ID of the particular census geography for which the data averages are calculated; 6. threshold: the travel time threshold in minutes, ranging from 5 to 60 minutes; 7. weighted_average: the average number of jobs a person can reach from a given census area within the travel time threshold for a specific mode. The LODES dataset used to calculate jobs in this data does not include job location data from the states of Alaska, Arkansas, or Mississippi. Therefore these states are not included in this data archive. See documentation at https://lehd.ces.census.gov/data/lodes/LODES8/LODESTechDoc8.1.pdf

Referenced by

Access Across America: Transit 2022 report https://hdl.handle.net/11299/266412

Related to

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License

CC0 1.0 Universal
 http://creativecommons.org/publicdomain/zero/1.0/

Publisher

Collections

Data Repository for U of M (DRUM)
Accessibility Observatory Data

Funding information

Federal Highway Administration, Transportation Pooled Fund program, TPF-5(455) to MnDOT

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Previously Published Citation

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Suggested citation

Owen, Andrew; Liu, Shirley Shiqin; Jain, Saumya; Hockert, Matthew; Lind, Eric. (2024). Access Across America: Transit 2022 Data. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/gjp7-4y32.

View/Download File

File View/Open
Description
Size
README.txt
data description (also included in each .zip file)
(2.08 KB)

AccessAcrossAmerica-Methodology2022.pdf
Methodology of Accessibility data generation and aggregation
(144.2 KB)

Alabama.zip
2022 Worker-weighted average access to jobs by transit, for each census unit in Alabama
(10.69 MB)

Arizona.zip
2022 Worker-weighted average access to jobs by transit, for each census unit in Arizona
(9.64 MB)

California.zip
2022 Worker-weighted average access to jobs by transit, for each census unit in California
(38.44 MB)

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