Appendix 1 Documentation of the Data Series

Appendix 1
Documentation of the Data Series

Excel | CSV | Table Version

1. Air Revenue Passenger-Miles (RPM)

Name of series Air Revenue Passenger-Miles (RPM)
Explanation One revenue passenger transported one mile
Source U.S. Department of Transportation, Bureau of Transportation Statistics, Office of Airline Information, Air Carrier Traffic Statistics Monthly, available at http://www.bts.gov/oai , January 1992
Data format Preliminary data; seasonally adjusted (in thousands)
Publication date Available at the end of the month for the 2 previous months
Revisions The latest 12 months of data are preliminary
Comments Based on BTS Form 41 filed by large certificated air carriers

1. Air Revenue Passenger-Miles (RPM). If you are a user with disability and cannot view this image, use the table version. If you need further assistance, please call 800-853-1351 or email answers@bts.gov.

2. National Transit Ridership

Name of series National Transit Ridership
Explanation Estimated unlinked passenger trips
Source American Public Transportation Association (APTA), APTA Quarterly Transit Ridership Report, available at http://www.bts.gov since January 1992
Data format Preliminary data; seasonally adjusted (in thousands of riders)
Publication date Available in the first day of each quarter for the 2 previous quarters
Revisions The latest 3 years of data are preliminary
Comments Includes ridership of commuter rail, heavy rail, light rail, and others

2. National Transit Ridership. If you are a user with disability and cannot view this image, use the table version. If you need further assistance, please call 800-853-1351 or email answers@bts.gov.

3. Rail Revenue Passenger-Miles (RPM)

Name of series Rail Revenue Passenger-Miles (RPM)
Explanation RPMs carried by Amtrak and Alaska Railroads
Source U.S. Department of Transportation, Federal Railroad Administration (FRA), Office of Safety Analysis, FRA Accident/Incident Bulletin, available at http://safetydata.fra.dot.gov/OfficeofSafety/Default.asp)
Data format Preliminary data; seasonally adjusted (in millions of riders)
Publication date Beginning of each month for previous 2 months
Revisions The latest 12 months of data are preliminary
Comments RPM for January 1980–December 1985 were estimated from data of revenue passengers, because empty trains were counted into RPM before that time

3. Rail Revenue Passenger-Miles (RPM). If you are a user with disability and cannot view this image, use the table version. If you need further assistance, please call 800-853-1351 or email answers@bts.gov.

4. Trucking Tonnage Index (TTI)

Name of series Trucking Tonnage Index (TTI)
Explanation Truck loads
Source American Trucking Association (ATA), Monthly Trucking Report
Data format Index: 1996 = 100; monthly, seasonally adjusted and unadjusted
Publication date 3rd of each month for the previous 2 months
Revisions The latest monthly data are preliminary
Comments Estimated from tonnage reported by ATA's members in 50 states

4. Trucking Tonnage Index (TTI). If you are a user with disability and cannot view this image, use the table version. If you need further assistance, please call 800-853-1351 or email answers@bts.gov.

5. Railroads Revenue Ton-Miles of Freight (RTMF)

Name of series Railroads Revenue Ton-Miles of Freight (RTMF)
Explanation Carloads of 20 railroads (total containers and trailers) in the United States
Source Association of American Railroads, Weekly Railroad Traffic, available at http://www.bts.gov since the 1st week of 1996
Data format Preliminary data; quarterly; seasonally adjusted (in billions)
Publication date Second month of each quarter for the 2 previous quarters
Revisions The latest 12 months of data are preliminary
Comments Monthly data were not available. We interpolated from the quarterly data; however, we expect to work with the monthly series soon.

5. Railroads Revenue Ton-Miles of Freight (RTMF). If you are a user with disability and cannot view this image, use the table version. If you need further assistance, please call 800-853-1351 or email answers@bts.gov.

6. Total Internal Commerce Tonnage Indicator (TICTI)

Name of series Total Internal Commerce Tonnage Indicator (TICTI), all commodities
Explanation Internal waterway tonnage of coal, petroleum and chemicals, and food and farm products; estimated from 11 key locks on 9 rivers
Source U.S. Army Corps of Engineers, Waterborne Commerce Statistics Center, available at http://www.iwr.usace.army.mil/ndc/monthlyindicators.htm , since January 1994
Data format Preliminary data; seasonally adjusted (in millions of short tons)
Publication date The beginning of each month for the 2 previous months
Revisions The latest 12 months of data are preliminary
Comments The data do not include great lakes, coastal and deep-sea waterborne traffic, which are currently not available

6. Total Internal Commerce Tonnage Indicator (TICTI). If you are a user with disability and cannot view this image, use the table version. If you need further assistance, please call 800-853-1351 or email answers@bts.gov.

7. Air Revenue Ton-Miles of Freight and Mails (RTMFM)

Name of series Air Revenue Ton-Miles of Freight and Mail (RTMFM)
Explanation Ton-miles of freight and express mail transported by the air industry
Source U.S. Department of Transportation, Bureau of Transportation Statistics, Office of Airline Information, Air Carrier Traffic Statistics Monthly, available at http://www.bts.gov/oai since January 1992
Data format Preliminary data; seasonally adjusted (in thousands)
Publication date The end of the month for the 2 previous months
Revisions The latest 12 months of data are preliminary
Comments Based on BTS Form 41 filed by large certificated air carriers

7. Air Revenue Ton-Miles of Freight and Mails (RTMFM). If you are a user with disability and cannot view this image, use the table version. If you need further assistance, please call 800-853-1351 or email answers@bts.gov.

8. Index of Energy Movements by Pipeline (IEMP)

Name of series Index of Energy Movements by Pipeline (IEMP)
Explanation Movements of crude oil and petroleum products between PADDs; Alaska field production and consumption of natural gas
Source U.S. Department of Energy, Energy Information Administration,
Petroleum Supply Monthly (for movements of crude oil and petroleum products) and Monthly Energy Review (for natural gas and Alaska field production)
Data format Final data; seasonally adjusted (in millions of tons)
Publication date 23rd–26th of each month for the 2 previous months
Revisions No revision
Comments Before January 1985, movements of crude oil between PADDs were not included in the total. In constructing IEMP, crude oil and petroleum products are in million barrels per day and natural gas is in cubic feet and are converted into tons using conversion factors. Conversion factors: 1 cubic foot of natural gas = 1,020 Btu (heat unit); 1 million Btu = 0.025 tons of oil equivalent; 1 barrel of petroleum products = 5.326 millions of Btu (heat unit).

8. Index of Energy Movements by Pipeline (IEMP). If you are a user with disability and cannot view this image, use the table version. If you need further assistance, please call 800-853-1351 or email answers@bts.gov.