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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 |
83 |
80 |
83 |
82 |
Major
air carriers |
N |
N |
N |
N |
N |
13 |
14 |
11 |
12 |
13 |
13 |
13 |
15 |
15 |
15 |
14 |
14 |
17 |
Other
air carriers |
N |
N |
N |
N |
N |
89 |
56 |
85 |
84 |
83 |
83 |
81 |
76 |
72 |
68 |
66 |
69 |
65 |
Railroads |
607 |
568 |
517 |
477 |
480 |
500 |
530 |
541 |
553 |
550 |
559 |
555 |
560 |
571 |
552 |
549 |
556 |
560 |
Class
I railroads |
106 |
76 |
71 |
73 |
39 |
25 |
14 |
11 |
10 |
9 |
9 |
9 |
8 |
8 |
7 |
7 |
7 |
7 |
Other
railroads |
501 |
492 |
446 |
404 |
441 |
475 |
516 |
530 |
543 |
541 |
550 |
546 |
552 |
563 |
545 |
542 |
549 |
553 |
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 |
600,104 |
674,314 |
677,317 |
679,744 |
Marine
vessel operatorsc |
U |
U |
U |
U |
U |
U |
U |
1,381 |
1,348 |
1,311 |
1,235 |
1,174 |
1,114 |
1,063 |
877 |
798 |
767 |
733 |
Pipeline
operatorsd |
N |
N |
1,123 |
1,682 |
2,243 |
2,204 |
2,212 |
(R)
2,387 |
(R)
2,346 |
(R)
2,301 |
(R)
2,260 |
(R)
2,260 |
(R)
2,172 |
(R)
2,128 |
(R)
2,171 |
(R)
2,196 |
2,216 |
2,166 |
Hazardous
liquid |
N |
N |
N |
N |
N |
g 222 |
187 |
209 |
215 |
217 |
225 |
(R) 237 |
243 |
(R) 239 |
(R) 237 |
(R) 232 |
222 |
235 |
Natural
gas transmission |
N |
N |
420 |
432 |
474 |
724 |
866 |
(R) 975 |
(R) 971 |
(R) 957 |
(R) 889 |
(R) 885 |
(R) 844 |
(R) 814 |
(R) 899 |
(R) 921 |
907 |
929 |
Natural
gas distribution |
N |
N |
938 |
f 1,500 |
f 1,932 |
1,485 |
1,382 |
1,444 |
1,397 |
(R)
1,365 |
(R)
1,375 |
(R)
1,393 |
(R)
1,363 |
(R)
1,341 |
(R)
1,331 |
(R)
1,309 |
1,318 |
1,291 |
KEY: N = data do not exist; R = revised; 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. Beginning in 2003 regional air
carriers are not required to report financial data which may result in under
reporting of "Other carriers" in this table.
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:
1960-2002: 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 ...".
2003: Ibid., personal communication, Oct. 5, 2004.
2004-05: 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.
1990-98: Ibid., Vol. 16 (Washington, DC: 1999), p. 10.
1999-2005: Ibid., Railroad Facts
(Washington, DC: Annual issues), p. 3.
Interstate motor
carriers:
1990-2001: U.S. Department of Transportation, Federal Motor
Carrier Safety Administration, Motor Carrier Management Information System
(MCMIS) data, personal communication, Nov. 6, 2001.
2002-03: U.S. Department of Transportation, Federal Motor
Carrier Safety Administration, Analysis and Information Online, Internet site
http://ai.volpe.dot.gov/mcspa.asp as of June 4, 2004 and personal
communication, Apr. 18, 2005.
2004-05: Ibid., personal communication, Jan. 18, 2007.
Marine vessel operators:
1995-2005: U.S. Army Corps of Engineers, Waterborne Transportation Lines of the United States,
Volume 1, National Summaries (New Orleans,
LA: Annual issues), table 13.
Pipeline Operators:
U.S. Department of Transportation, Office of Pipeline Safety,
personal communication, Feb. 7, 2007.
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