# Transportation Services Index and Seasonally-Adjusted Transportation Data

## Local file

- Dataset file: `transportation_services_index.csv`
- Format: CSV
- Retrieved: 2026-07-01
- Size: 154,495 bytes, about 150.9 KB
- Shape: 316 data rows, 66 columns
- SHA-256: `f1fa531faf5079be04b66aba5c27a435f7f4526779cabe9f41d9ff1572b09051`

## Source

- Found at: https://catalog.data.gov/dataset/seasonally-adjustment-transportation-data
- Publisher: Bureau of Transportation Statistics
- Direct download used: https://data.transportation.gov/api/views/bw6n-ddqk/rows.csv?accessType=DOWNLOAD

## What it is

This dataset contains monthly transportation indicators used in the Transportation Services Index and related seasonally adjusted transportation measures. The rows are monthly observations, with IDs such as `SATD200001`, and the date field is `OBS_DATE`.

The columns include aviation, rail, transit, petroleum, natural gas, waterborne, trucking, freight index, passenger index, total transportation index, industrial production, and related indexed measures. Several columns appear to include seasonally adjusted or derived index variants.

## Notes for static website use

- The file is small enough to ship directly with a static site build.
- The dataset is wide, so client-side visualizations should select a focused subset of columns rather than loading all fields into a table view.
- Date values are stored as strings like `01/01/2000`; parse `OBS_DATE` explicitly if using the data in JavaScript charts.
- The CSV was downloaded as-is from the source. No filtering, sorting, or transformations were applied.