Source register
Open data atlas
Pages across the site draw on 19 official datasets. Each row says who publishes it, under what licence, for what period, when we fetched it and what it cannot tell you. We read the licence from the dataset metadata. Where a dataset states no licence we say so, and treat it as U.S. government data that is publicly available without a key. Sources we could not reach are listed at the bottom, so nobody has to guess.
SnapshotAtlas registerData period: register built from the files in the projectRetrieved Oct 9, 2026, 00:00 UTCretrieved Oct 9, 2026
Every dataset
Click a column heading to sort. The links lead to the page that uses the data.
| Dataset | Publisher | Used on | Licence as stated | Data period | Retrieved | Refreshes | Main limit |
|---|---|---|---|---|---|---|---|
| Diesel prices, current weeks | EIA | Diesel | US government work, public domain; attribute 'Source: U.S. Energy Information Administration' | see source page | Oct 8, 2026 | Weekly (Monday) | weekly retail pump average, regional, not live, not a freight rate. |
| Diesel prices, weekly history | EIA | Diesel seasonality | US government work, public domain; attribute 'Source: U.S. Energy Information Administration' | weekly to 2026-10-05 | Oct 9, 2026 | Weekly (Monday) | weekly Monday retail pump average, nominal dollars (not inflation adjusted), not live, not a freight rate; EIA_API_KEY not used. |
| Active weather alerts | NWS | Weather risk | US government, open data; do not imply NWS endorsement or modify and present as official | see source page | Oct 8, 2026 | Minutes; alerts expire | snapshot at retrieval time; alerts expire; not a delay prediction. |
| Storm Events history | NOAA NCEI | Weather calendar | US government work, public domain; NOAA asks that you not imply endorsement | calendar years 2021 to 2025 | Oct 9, 2026 | Files re-issued about monthly, years revised | Event-days measure recorded weather events, which depend on reporting (population, spotters) as well as weather. |
| Company Census | FMCSA | Carrier safety, USDOT record | No license stated in dataset metadata; US government data, publicly accessible without key. Aggregates only. | rows updated Oct 8, 2026 | Oct 9, 2026 | Daily | self-reported on MCS-150, filings can be years old; includes interstate and intrastate carriers, all classifications; band = power units reported; carriers with 0 or blank power units not in any band. |
| Company Census profile | FMCSA | USDOT record | No license stated in dataset metadata; US government data, public without key. Aggregates only. | rows updated Oct 9, 2026 | Oct 9, 2026 | Daily | self-reported on MCS-150; counts are of USDOT-number records, not of distinct companies; filter status_code A and US physical address unless stated. |
| Safety Measurement System, property carriers | FMCSA | Carrier safety | No license stated in dataset metadata; US government data, public without key. Aggregates only. | rows updated Sep 13, 2026 | Oct 9, 2026 | Monthly | 24-month inspection window as defined in the SMS file. |
| Vehicle Inspection File | FMCSA | Crash and inspection | No license stated in dataset metadata; US government data, public without key. Aggregates only. | rows updated Oct 9, 2026 | Oct 9, 2026 | Daily to weekly | The open file covers inspections from late 2023 onward, so 2024 and 2025 are the only full calendar years. |
| Crash File | FMCSA | Crash and inspection | No license stated in dataset metadata; US government data, public without key. Aggregates only. | rows updated Oct 9, 2026 | Oct 9, 2026 | Daily to weekly; states report late | FMCSA crash file holds state-police-reported crashes involving trucks and buses that meet the federal reportable threshold (fatality, injury treated away from scene, or tow-away). |
| National Bridge Inventory | FHWA via BTS NTAD | Bridge conditions | Work of the US government (17 USC 101), not copyrighted, unrestricted public use (service copyrightText) | as of June 20, 2025 | Oct 9, 2026 | Annual | as of June 2025, annual state submissions; a poor rating is not a closure; posting rules may not apply to a given truck weight; clearance is a recorded minimum, not a route check; use your state permit office for route decisions. |
| Truck Stop Parking, Jason's Law | FHWA, BTS NTAD | Truck parking | Work of the US government (17 USC 101), not copyrighted, unrestricted public use (service copyrightText) | see source page | Oct 9, 2026 | One-off (2015 survey, 2019 file) | compiled 2019, not availability, not live; facilities may have closed, opened or changed; spots are counts reported in the survey. |
| Jason's Law survey tables | FHWA | Truck parking | US government work, public domain | see source page | Oct 9, 2026 | One-off (2015) | survey year 2014-2015, 10+ years before this site build; spaces per 100K daily truck vehicle-miles-traveled uses VMT of that time; survey percentages are shares of respondents naming the state, not measured shortages; not live. |
| Truck size and weight enforcement | FHWA | Road restrictions | Public Domain U.S. Government (dataset metadata) | rows updated May 13, 2025 | Oct 9, 2026 | Annual | as reported by each state; reporting practices differ; counts are of enforcement events and permits, not of rules or fines. |
| Oversize and overweight permit offices | FHWA | Road restrictions | US government work, public domain | see source page | Oct 9, 2026 | When states change | links as listed by FHWA on the retrieval date; state pages change; we do not copy any state rule. |
| Freight Analysis Framework 6, truck flows | BTS and FHWA | Freight corridors, Lane costs | not stated | see source page | no data | Periodic (2022 base year) | modeled historical annual flows by state, NOT live demand, NOT rates, NOT lane-level or city-level. |
| State internal points | Census Bureau TIGERweb | distance estimates on corridor pages | US government work, public domain | see source page | Oct 9, 2026 | Decennial geography | one point per state; used only to estimate state-to-state straight-line distance. |
| Truck driver wages by state | BLS OEWS | Detention cost | BLS data are public domain; cite BLS (bls.gov/opub/copyright-information) | 2025 | Oct 9, 2026 | Annual (May estimates) | mean wage paid to employee drivers; excludes self-employed owner-operators; does not include benefits, payroll tax, insurance or the truck itself; some states may have no estimate. |
| Freight price, volume and jobs indexes | BLS and BTS via FRED | Freight cost indices, Fuel shock pilot | FRED terms of use; underlying BLS and BTS data are U.S. government works. Series notes on each FRED page. | monthly to 2026-09 | Oct 9, 2026 | Monthly | Monthly values, not spot rates and not a rate for any lane. |
| USDOT registration rule, 49 CFR 390.201 | eCFR (Office of the Federal Register) | USDOT record | US government work, public domain | as of Oct 1, 2026 | Oct 9, 2026 | When the rule changes | rule text excerpt only; read the full section and ask FMCSA or counsel for how it applies to a given carrier. |
Retrieval dates and licences are read from each data file at build time. A missing licence means the publisher left it blank in the metadata, not that we looked and found none.
Sources we could not use
Blocked, key-only or without history. Nothing on the pages relies on these.
| Source | What happened |
|---|---|
| BLS API v2 | BLS_API_KEY not set; v1 used (25 requests a day), one request for three series |
| Census ACS | skipped: no state-level truck statistic that adds to BLS OEWS (already in wave 2) and FAF; CENSUS_API_KEY present but unused |
| EIA API v2 (api.eia.gov/v2) | EIA_API_KEY is not set in this shell; no key was read, printed or stored. Used the public EIA history files instead. |
| FEMA OpenFEMA | 403 from this server per registry; not requested in wave 4 |
| FMCSA SMS downloads page (ai.fmcsa.dot.gov) | 403 |
| api.us.socrata.com catalog | returned 0 results; used data.transportation.gov/api/catalog/v1 |
| api.weather.gov alerts history | alerts endpoint with start/end dates in 2025 returned zero features (active alerts only); used NOAA NCEI Storm Events instead |
| csa.fmcsa.dot.gov documents | 403 |
| ecfr.gov API | needs Accept-Encoding gzip (works with it) |
| fmcsa.dot.gov / ai.fmcsa.dot.gov | 403 to non-browser clients (wave 1 finding) |
| fmcsa.dot.gov / safer / li-public / QCMobile | 403 to non-browser clients from this server (registry 2026-10-09); not requested |
| fmcsa.dot.gov data pages | 403 |
| geo.dot.gov NBI service | Token Required (499); used the BTS NTAD copy on services.arcgis.com instead |
| hepgis.fhwa.dot.gov | no connection |
What this number means
- Open does not mean fresh. The truck parking file is from a 2015 survey. The bridge file is from June 2025. The diesel series is weekly.
- Open does not mean a licence. Several FMCSA datasets state no licence. We treat them as U.S. government data and use only aggregates.
- Official does not mean complete. The limits column is where each file stops being useful.
- Where a figure is missing the pages say "no data". They do not fill the gap with a guess.
What to do about it
- Before you quote a number from these pages, check the retrieval date and the refresh cycle in the table.
- If you need a figure for a contract, a claim or a filing, go to the publisher and use the link on the page. This site is a reading aid.
- Check the freshness of any number you carry yourself with the checker below.
- Tell us if a source has moved or changed. A stale link is a bug.
Is the number you hold still current?
Pick the dataset your figure came from and the date of your figure. The checker compares it with how often the source refreshes.
YYYY-MM-DD
Age of your figure
enter a date
- Source refreshes
- Our copy was fetched
- Refresh cycles missed by your figure
Formula: today minus your date, divided by the typical refresh interval of the source. The example numbers are invented placeholders. Replace them with yours.
How we handle open data
- Only aggregates of FMCSA files are stored. No carrier record is kept.
- No API key is read, printed or stored. The EIA API v2 needs a key that this build did not have, so the public EIA history files are used.
- Every data file has a retrieval time in UTC, a licence line and a limitations line.
- When a fetch is blocked we log it here and the page does not use it.
What we do not do
- Name, rank or score a carrier or broker.
- Present a regional number as a city or lane number.
- Present history as a forecast.
- Fill a gap with an estimate. A gap reads "no data".
Related: state trucking profiles, open-data pilots.
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