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Table 1-2: Number of Air Carriers, Railroads, Interstate Motor Carriers, Marine
Vessel Operators, and Pipeline Operators
Excel | CSV
Air carriersa |
N |
N |
39 |
36 |
63 |
102 |
70 |
96 |
96 |
96 |
96 |
94 |
91 |
87 |
Major air carriers |
N |
N |
N |
N |
N |
13 |
14 |
11 |
12 |
13 |
13 |
13 |
15 |
15 |
Other air carriers |
N |
N |
N |
N |
N |
89 |
56 |
85 |
84 |
83 |
83 |
81 |
76 |
72 |
Railroads |
607 |
568 |
517 |
477 |
480 |
500 |
530 |
541 |
553 |
550 |
559 |
555 |
560 |
U |
Class I railroads |
106 |
76 |
71 |
73 |
39 |
25 |
14 |
11 |
10 |
9 |
9 |
9 |
8 |
U |
Other railroads |
501 |
492 |
446 |
404 |
441 |
g 475 |
516 |
530 |
543 |
541 |
550 |
546 |
552 |
U |
Interstate motor carriersb |
e |
e |
e |
e |
U |
U |
216,000 |
346,000 |
379,000 |
417,000 |
477,486 |
517,297 |
560,393 |
592,909 |
Marine vessel operatorsc |
U |
U |
U |
U |
U |
U |
U |
2,519 |
2,505 |
2,494 |
2,534 |
2,391 |
2,341 |
U |
Pipeline operatorsd |
N |
N |
1,123 |
1,682 |
2,243 |
2,204 |
2,212 |
2,378 |
2,338 |
2,282 |
2,225 |
2,216 |
2,163 |
1,957 |
Hazardous liquid |
N |
N |
N |
N |
N |
g 222 |
187 |
209 |
215 |
217 |
225 |
216 |
243 |
239 |
Natural gas transmission |
N |
N |
420 |
432 |
474 |
724 |
866 |
974 |
970 |
954 |
880 |
862 |
828 |
637 |
Natural gas distribution |
N |
N |
938 |
f 1,500 |
f 1,932 |
1,485 |
1,382 |
1,444 |
1,397 |
1,363 |
1,366 |
1,382 |
1,351 |
1,305 |
KEY: N = data do not exist; U = data are not available.
a Carrier groups are categorized based on their annual operating
revenues as major, national, large regional, and medium regional. The thresholds
were last adjusted July 1, 1999, and the threshold for major air carriers is
currently $1 billion. The other air carrier category contains all national,
large regional, and medium regional air carriers.
b Figures are for the fiscal year, October through September. The
Federal Motor Carrier Safety Administration deletes motor carriers from the
Motor Carrier Management Information System (MCMIS) when they receive an official
notice of a change in status. This most often occurs when a safety audit or
compliance review is attempted. As a result, inactive carriers may be included
in the MCMIS.
c The printed source materials do not contain totals for the number
of operators and data files from which the figures can be determined are not
available prior to 1993.
d There is some overlap among the operators for the pipeline modes
so the total number of pipeline operators is lower than the sum for the three
pipeline modes.
e Prior to 1980, the source of motor carrier data was the Interstate
Commerce Commission (ICC), which was abolished on Jan. 1, 1996. (Certain functions
were transferred to the Surface Transportation Board and the Department of Transportation.)
The system used by ICC to collect motor carrier data differs significantly from
that used by the Federal Motor Carrier Safety Administration in its Motor Carrier
Management Information System (MCMIS), which began operations in 1980. The MCMIS
is updated weekly, but archive versions are not retained. Because of differences
between the two systems, data are not comparable and thus are not included here.
f Includes master meter and mobile home park natural gas distribution
operators. A master meter system is a pipeline system for distributing gas within,
but not limited to, a definable area, such as a mobile home park, housing project,
or apartment complex, where the operator purchases metered gas from an outside
source for resale through a gas distribution pipeline system. The gas distribution
pipeline system supplies the ultimate consumer who either purchases the gas
directly through a meter or by other means, such as by rents.
g This value is for 1986. The number of hazardous liquid pipeline
operators is not available for prior years.
SOURCES
Air carriers:
U.S. Department of Transportation, Bureau of Transportation Statistics, Office
of Airline Information, Air Carrier Financial Statistics Quarterly (Washington,
DC: Fourth quarter issues), "Alphabetical List of Air Carriers by Carrier
Group ...".
Railroads:
1960-85: Association of American Railroads, Railroad Ten-Year Trends,
Vol. 2 (Washington, DC), table I-2.
1989-98: Ibid., Vol. 16 (Washington, DC: 1999), p. 10.
1999-2000: Ibid., Railroad Facts (Washington, DC: Annual issues), p.
3.
Interstate motor carriers:
U.S. Department of Transportation, Federal Motor Carrier Safety Administration,
Motor Carrier Management Information System (MCMIS) data, personal communication,
Nov. 6, 2001.
Marine vessel operators:
1995-2000: U.S. Army Corps of Engineers, Waterborne Transportation Lines
of the United States, Volume 2, Vessel Company Summary (New Orleans, LA:
Annual issues), source data files.
Pipeline Operators:
U.S. Department of Transportation, Office of Pipeline Safety, personal communication,
Nov. 15, 2001.
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