1

1

Transportation of 

U.S. Grains

A Modal Share Analysis 

1978-2020 Update

Updated

August 2023
Photo credits: USDA

USDA is an equal opportunity provider, employer, and lender.

Preferred Citation

Henderson, Richard, Jesse Gastelle, and Peter Caffarelli. Transportation of U.S. Grains: A 

Modal Share Analysis, August 2023. U.S. Dept. of Agriculture, Agricultural Marketing Service. 

Web. <http://dx.doi.org/10.9752/TS049.08-2023>
i

Transportation of 

U.S. Grains

A Modal Share Analysis

1978-2020 Update

USDA Economists

Richard Henderson

Jesse Gastelle

Peter Caffarelli

Transportation Services Division

USDA Agricultural Marketing Service
ii

Abstract

This report provides a breakout by mode of corn, wheat, soybeans, sorghum, and barley movements to 

either domestic markets or U.S. ports for export between 1978 and 2020. It is the thirteenth update of an 

initial modal share study completed in 1992. The purpose of this series of reports is to provide the latest 

information about changes and trends in the relative competitiveness and efficiency among the different 

transportation modes in moving grain. Estimates of the tonnages (and shares) of grain railed, barged, and 

trucked are developed from a variety of secondary sources. This data can be used to identify trends and 

implications on transportation from factors, such as changes in production volumes and commodity mix, 

as well as changes in the relative demand for U.S. grain for domestic purposes versus export.
iii

Contents

Abstract .......................................................................................................................ii

Introduction..................................................................................................................1

Methodology .................................................................................................................2

Corn Modal Shares ........................................................................................................8

Wheat Modal Shares ....................................................................................................10

Soybean Modal Shares .................................................................................................12

Sorghum Modal Shares ................................................................................................14

Barley Modal Shares ....................................................................................................16

Appendix A: Modal Share Methodology ..........................................................................18

Appendix B: FIPS Regions Included in Rail Export Tonnages .............................................20
iv
1

Introduction

The purpose of this analysis is to examine trends in the type of transportation used to move grains grown 

for the food and feed industry.1 Grains produced in the United States move to domestic and foreign 

markets through a well-developed transportation system. Barge, rail, and truck transportation facilitate a 

highly competitive market that bridges the gap between U.S. grain producers and domestic and foreign 

consumers. 

Barges, railroads, and trucks often compete head-to-head to supply transportation for grains. Despite a 

high degree of competition in some markets, these modes also complement each other. Before a bushel 

of grain reaches its final destination, it has often been transported by two or more modes. This balance 

between competition and integration provides grain shippers with a highly efficient, low-cost system of 

transportation. The competitiveness of U.S. grains in the world market and the financial well-being of U.S. 

grain producers depends upon this competitive balance. A highly competitive and efficient transportation 

system results in lower shipping costs, smaller marketing margins for middlemen, and more competitive 

export prices. Such efficiencies also result in lower food costs for U.S. consumers and higher market prices 

for U.S. producers. 

This analysis of the transportation of the final movement of grain, by mode, provides information about 

changes in market share among the modes. Over several years, such work helps identify critical trends 

affecting the transportation of grain. It also provides a framework to assess public policies that influence 

the development and success of the Nation’s transportation infrastructure. Public policies that promote an 

efficient grain transportation system also promote strong U.S. agricultural and rural economies. 

Note to readers regarding past versions of this report: This update presents new data for 2020 as well as 

minor revisions to previous years.

1 For this analysis, it is assumed that corn, wheat, soybeans, sorghum, and barley represent all grain movements.
2

Any effort to measure tonnages of grain moved by mode of transport is limited by the absence of 

information on the total volume of truck movements. Accurate data exist for barge and rail freight 

tonnages and commodities, but not for trucks. Other analyses of grain movements have relied extensively 

on survey data to overcome this obstacle. This analysis uses the Waterborne Commerce Statistics of the 

U.S. Army Corps of Engineers to calculate tonnages of barged grain and uses the Carload Waybill Sample 

from the Surface Transportation Board to estimate the amount of railed grain. Trucking data are derived 

from known grain production data, as compared to the estimates of the railed and barged volumes of 

grain. Estimating these modal grain volumes and modal shares on an annual basis provides a data series 

that tracks changes in grain transportation over time.

In this analysis, the term “modal share” describes that portion of the total tonnages of grain moved by 

each mode of transport—barge, rail, or truck. These shares, expressed as percentages, were determined 

by mode for particular types of grains and movements. Grains identified for this analysis were corn, 

wheat, soybeans, sorghum, and barley. The 1992 and 1998 versions of this study also included rye 

and oats. Rye and oats were taken out of the calculations for this report because of unreliability due to 

small volumes, which total less than 1 percent of all grain movements. Transport modes are categorized 

according to the final movement going to domestic markets or ports for export.

The estimates of modal tonnages and shares are based on the amount of grain moved to commercial 

markets. Truck tonnages are estimated by subtracting barge and rail tonnages from total tonnages 

transported. Figure 1 shows how modal shares are estimated. For each crop, total movements are 

determined first, and then exports are subtracted from the total to get domestic movements. Total rail and 

barge volumes are subtracted from total movements to get truck movements. A more detailed description 

of the methodology is covered in Appendix A.

Methodology

Figure 1: Estimating modal tonnages and shares

Total 

Movements*

Domestic 

Truck

Domestic 

Barge

Domestic 

Rail

Export 

Truck

Export 

Barge

Export 

Rail

Total 

Truck

Total 

Barge

Total 

Rail

Domestic 

Movements

Export 

Movements

(=)

(-) 

 KEY

 Subtract

 Equals

 *Total movement equals total 

 disappearance less the amount of 

 grain grown and used on farm.

(=)

(-)

(=) (=)

(=)

(=)

(=)

(-)

(-)

(-)

(-)

(-)

(-) (-)

(-)
3

Figure 2: Total grain movements to domestic and export markets, 1978-2020

Figure 3: U.S. grain shipments by commodity, 1978-2020

0

100

200

300

400

500

600

700

1978198019821984198619881990199219941996199820002002200420062008201020122014201620182020

Million Tons

Year

Exports

Domestic

Total

0

100

200

300

400

500

600

700

1978198019821984198619881990199219941996199820002002200420062008201020122014201620182020

Million Tons

Year

Corn Wheat

Soybeans Barley

Sorghum Total
4

Table 1: Tonnages of U.S. grains transported, by type of crop and type of movement, 

2004-2020

Year

Corn Wheat Soybeans Sorghum Barley All grains

1,000 tons

Total

2004 241,129 66,878 85,645 10,885 5,386 409,923

2005 260,160 62,372 81,925 10,293 5,334 420,085

2006 284,980 57,895 89,274 9,284 4,887 446,318

2007 290,163 67,470 88,782 11,602 5,689 463,705

2008 302,243 66,847 88,832 12,419 5,174 475,516

2009 302,403 56,895 97,860 11,319 4,685 473,163

2010 336,597 61,780 96,186 9,220 4,651 508,434

2011 321,787 68,045 93,110 7,592 4,456 494,991

2012 308,008 66,591 91,043 6,698 4,538 476,878

2013 295,101 70,691 101,639 7,799 4,648 479,878

2014 350,231 62,616 115,292 12,553 4,784 545,475

2015 353,472 57,186 117,619 13,847 4,649 546,774

2016 365,303 62,086 125,644 13,714 4,365 571,112

2017 375,957 61,132 128,246 11,873 3,799 581,007

2018 387,432 56,234 118,739 9,016 3,655 575,076

2019 377,092 65,273 118,128 9,788 3,894 574,176

2020 377,153 61,239 134,858 11,091 3,982 588,322

Export

2004 53,394 34,728 32,915 5,089 370 126,496

2005 50,629 30,413 28,196 5,062 839 115,140

2006 63,429 26,815 33,495 5,205 439 129,384

2007 63,438 37,238 34,765 6,326 832 142,599

2008 58,874 33,812 38,379 5,813 601 137,478

2009 52,749 25,153 44,971 4,164 132 127,169

2010 54,819 31,174 45,149 4,143 189 135,474

2011 50,371 36,540 40,958 3,728 218 131,815

2012 35,265 29,256 39,826 1,991 213 106,551

2013 26,200 35,922 49,157 2,492 217 113,988

2014 55,305 28,677 55,273 7,870 369 147,494

2015 48,923 23,939 58,279 10,595 336 142,072

2016 61,918 27,176 64,997 7,566 109 161,766

2017 57,832 30,595 64,012 6,617 146 159,202

2018 76,674 25,256 52,603 4,319 106 158,958

2019 46,435 30,386 50,377 2,942 130 130,271

2020 57,606 29,557 67,817 7,242 209 162,431

Domestic

2004 187,735 32,150 52,731 5,796 5,015 283,428

2005 209,532 31,959 53,729 5,231 4,495 304,945

2006 221,551 31,080 55,779 4,078 4,447 316,934

2007 226,725 30,232 54,017 5,276 4,856 321,107

2008 243,369 33,035 50,453 6,606 4,574 338,038

2009 249,654 31,743 52,889 7,155 4,553 345,994

2010 281,777 30,607 51,036 5,077 4,462 372,960

2011 271,416 31,505 52,153 3,864 4,238 363,176

2012 272,743 37,015 51,217 4,707 4,324 370,006

2013 268,901 34,260 52,482 5,307 4,431 365,381

2014 294,926 33,939 60,019 4,683 4,414 397,981

2015 304,550 33,247 59,340 3,252 4,313 404,701

2016 303,385 34,910 60,647 6,148 4,257 409,346

2017 318,125 30,537 64,234 5,257 3,652 421,805

2018 310,758 30,978 66,136 4,697 3,549 416,118

2019 330,657 34,887 67,751 6,846 3,765 443,905

2020 319,548 31,682 67,041 3,849 3,772 425,892
5

Figure 5: U.S. grain modal shares, 1978-2020

Figure 4: U.S. corn, soybeans, and wheat production, 1978-2020

0%

10%

20%

30%

40%

50%

60%

70%

80%

1978198019821984198619881990199219941996199820002002200420062008201020122014201620182020

Percentage of total grain movements

Year

Rail

Barge

Truck

0

2

4

6

8

10

12

14

16

1978197919801981198219831984198519861987198819891990199119921993199419951996199719981999200020012002200320042005200620072008200920102011201220132014201520162017201820192020

Billion Bushels

Year

Corn

Soybeans

Wheat
6

Table 2: Tonnages and modal shares for all U.S. grains, 2004–2020

Year & 

type of 

movement

Mode of transport

Rail Barge Truck

1,000 tons Percent 1,000 tons Percent 1,000 tons Percent

Total

2004 136,354 33 67,274 16 206,296 50

2005 141,145 34 57,668 14 221,272 53

2006 158,549 36 60,484 14 227,285 51

2007 152,427 33 65,750 14 245,529 53

2008 149,061 31 56,118 12 270,337 57

2009 142,682 30 62,689 13 267,793 57

2010 151,274 30 65,428 13 291,732 57

2011 138,159 28 59,789 12 297,042 60

2012 125,993 26 60,426 13 290,459 61

2013 115,107 24 56,764 12 308,007 64

2014 132,234 24 74,966 14 338,275 62

2015 135,734 25 72,063 13 338,976 62

2016 141,140 25 81,235 14 348,737 61

2017 135,128 23 77,412 13 368,468 63

2018 132,604 23 77,156 13 365,317 64

2019 126,505 22 64,405 11 383,265 67

2020 135,502 23 78,361 13 374,460 64

Export

2004 49,760 39 61,729 49 15,006 12

2005 53,797 47 52,981 46 8,361 7

2006 59,719 46 56,617 44 13,048 10

2007 63,138 44 61,613 43 17,848 13

2008 68,176 50 51,765 38 17,537 13

2009 59,143 47 59,095 46 8,932 7

2010 68,222 50 61,371 45 5,880 4

2011 54,447 41 55,877 42 21,491 16

2012 41,471 39 55,603 52 9,798 9

2013 39,984 35 51,854 45 22,660 20

2014 53,491 36 71,045 48 22,958 16

2015 50,530 36 68,157 48 23,386 16

2016 63,725 39 77,253 48 20,788 13

2017 59,613 37 73,426 46 26,164 16

2018 57,832 36 73,718 46 27,409 17

2019 50,578 39 61,814 47 17,879 14

2020 60,994 38 75,141 46 26,296 16

Domestic

2004 86,594 31 5,544 2 191,290 67

2005 87,347 29 4,686 2 212,911 70

2006 98,830 31 3,867 1 214,237 68

2007 89,289 28 4,137 1 227,681 71

2008 80,885 24 4,353 1 252,799 75

2009 83,539 24 3,594 1 258,861 75

2010 83,051 22 4,057 1 285,852 77

2011 83,712 23 3,912 1 275,551 76

2012 84,523 23 4,823 1 280,660 76

2013 75,123 21 4,910 1 285,347 78

2014 78,743 20 3,921 1 315,317 79

2015 85,204 21 3,907 1 315,591 78

2016 77,415 19 3,982 1 327,949 80

2017 75,515 18 3,986 1 342,304 81

2018 74,772 18 3,438 1 337,908 81

2019 75,927 17 2,592 1 365,386 82

2020 74,508 17 3,220 1 348,164 82
7

Table 3: Modal Share Summary: 2020 and 5-year average, percent

Mode/

Year

Corn Wheat Soybeans All grains

Exports Domestic All 

Corn Exports Domestic All Wheat Exports Domestic All Soybeans Exports Domestic All Grains

Rail 

2020 34 15 18 53 47 50 31 14 23 38 17 23

Rail 

5-yr avg 35 15 19 59 50 54 27 13 20 38 18 23

Barge 

2020 53 0 8 28 1 14 53 2 28 46 1 13

Barge 

5-yr avg 51 0 9 30 1 15 55 3 28 47 1 13

Truck 

2020 13 84 73 19 52 36 16 83 50 16 82 64

Truck 

5-yr avg 14 84 73 11 49 31 18 84 52 15 81 64
8

Corn Modal Shares

Table 4: Tonnages and modal shares for U.S. corn, 2004–2020

Year & 

type of 

movement

Mode of transport

Rail Barge Truck

1,000 tons Percent 1,000 tons Percent 1,000 tons Percent

Total

2004 74,766 31 37,302 15 129,062 54

2005 75,261 29 31,739 12 153,161 59

2006 87,514 31 34,587 12 162,878 57

2007 78,650 27 37,407 13 174,106 60

2008 75,652 25 30,088 10 196,503 65

2009 69,803 23 32,147 11 200,453 66

2010 74,909 22 33,134 10 228,553 68

2011 72,059 22 29,434 9 220,294 68

2012 64,514 21 22,331 7 221,162 72

2013 53,808 18 18,421 6 222,872 76

2014 66,701 19 35,072 10 248,457 71

2015 69,153 20 30,572 9 253,747 72

2016 69,839 19 35,729 10 259,735 71

2017 67,278 18 32,815 9 275,864 73

2018 78,696 20 37,555 10 271,181 70

2019 64,720 17 23,130 6 289,243 77

2020 68,022 18 31,997 8 277,134 73

Export

2004 16,055 30 33,974 64 3,365 6

2005 18,380 36 28,778 57 3,472 7

2006 24,744 39 31,941 50 6,744 11

2007 20,478 32 34,689 55 8,270 13

2008 24,615 42 27,457 47 6,802 12

2009 19,801 38 30,013 57 2,936 6

2010 22,070 40 31,174 57 1,575 3

2011 17,237 34 27,331 54 5,802 12

2012 10,108 29 19,825 56 5,332 15

2013 7,034 27 16,019 61 3,147 12

2014 14,822 27 33,624 61 6,859 12

2015 14,116 29 29,256 60 5,550 11

2016 21,582 35 34,187 55 6,150 10

2017 18,523 32 31,213 54 8,096 14

2018 30,369 40 36,356 47 9,949 13

2019 15,539 33 22,068 48 8,829 19

2020 19,593 34 30,716 53 7,296 13

Domestic

2004 58,711 31 3,328 2 125,697 67

2005 56,881 27 2,961 1 149,689 71

2006 62,770 28 2,646 1 156,134 70

2007 58,171 26 2,718 1 165,836 73

2008 51,037 21 2,631 1 189,701 78

2009 50,002 20 2,135 1 197,517 79

2010 52,839 19 1,960 1 226,978 81

2011 54,822 20 2,102 1 214,492 79

2012 54,406 20 2,506 1 215,830 79

2013 46,774 17 2,402 1 219,725 82

2014 51,879 18 1,448 0 241,598 82

2015 55,037 18 1,317 0 248,196 81

2016 48,258 16 1,542 1 253,585 84

2017 48,755 15 1,602 1 267,768 84

2018 48,327 16 1,199 0 261,232 84

2019 49,181 15 1,062 0 280,414 85

2020 48,429 15 1,281 0 269,838 84
9

Figure 6: U.S. corn domestic shipments by mode, 2004–2020

Figure 7: U.S. corn export shipments by mode, 2004–2020

0

50

100

150

200

250

300

350

04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20

Million Tons

Year

Truck

Barge

Rail

0

10

20

30

40

50

60

70

80

90

04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20

Million Tons

Year

Truck

Barge

Rail
10

Wheat Modal Shares

Table 5: Tonnages and modal shares for U.S. wheat, 2004-2020

Year & 

type of 

movement

Mode of transport

Rail Barge Truck

1,000 tons Percent 1,000 tons Percent 1,000 tons Percent

Total

2004 40,934 61 11,937 18 14,008 21

2005 44,195 71 8,668 14 9,509 15

2006 44,740 77 8,767 15 4,388 8

2007 47,781 71 10,515 16 9,174 14

2008 45,670 68 8,872 13 12,305 18

2009 41,094 72 8,462 15 7,339 13

2010 44,017 71 8,471 14 9,293 15

2011 43,417 64 9,844 14 14,784 22

2012 35,025 53 10,814 16 20,753 31

2013 36,290 51 15,170 21 19,232 27

2014 33,527 54 10,055 16 19,033 30

2015 32,388 57 9,112 16 15,685 27

2016 34,522 56 8,445 14 19,119 31

2017 35,917 59 9,279 15 15,935 26

2018 29,758 53 9,020 16 17,457 31

2019 35,565 54 8,876 14 20,832 32

2020 30,459 50 8,733 14 22,047 36

Export

2004 23,157 67 11,370 33 200 1

2005 22,120 73 8,294 27 0 0

2006 18,249 68 8,566 32 0 0

2007 26,520 71 10,229 27 489 1

2008 25,384 75 8,428 25 0 0

2009 17,183 68 7,970 32 0 0

2010 23,161 74 8,013 26 0 0

2011 24,175 66 9,333 26 3,033 8

2012 16,474 56 10,126 35 2,655 9

2013 18,034 50 14,519 40 3,368 9

2014 16,700 58 9,437 33 2,539 9

2015 13,855 58 8,411 35 1,673 7

2016 17,438 64 7,887 29 1,851 7

2017 19,398 63 8,824 29 2,373 8

2018 13,818 55 8,628 34 2,810 11

2019 18,913 62 8,584 28 2,889 10

2020 15,652 53 8,353 28 5,552 19

Domestic

2004 17,777 55 566 2 13,807 43

2005 22,075 69 375 1 9,509 30

2006 26,491 85 200 1 4,388 14

2007 21,261 70 286 1 8,685 29

2008 20,286 61 444 1 12,305 37

2009 23,911 75 493 2 7,339 23

2010 20,856 68 458 1 9,293 30

2011 19,242 61 511 2 11,752 37

2012 18,551 50 688 2 17,776 48

2013 18,255 53 651 2 15,354 45

2014 16,827 50 617 2 16,494 49

2015 18,533 56 701 2 14,012 42

2016 17,084 49 558 2 17,267 49

2017 16,519 54 456 1 13,562 44

2018 15,939 51 392 1 14,646 47

2019 16,651 48 292 1 17,944 51

2020 14,807 47 380 1 16,495 52
11

Figure 8: U.S. wheat domestic shipments by mode, 2004–2020

Figure 9: U.S. wheat export shipments by mode, 2004-2020

0

5

10

15

20

25

30

35

40

45

50

04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20

Million Tons

Year

Truck

Barge

Rail

0

5

10

15

20

25

30

35

40

45

50

04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20

Million Tons

Year

Truck

Barge

Rail
12

Soybean Modal Shares

Year & 

type of 

movement

Mode of transport

Rail Barge Truck

1,000 tons Percent 1,000 tons Percent 1,000 tons Percent

Total

2004 15,056 18 17,053 20 53,537 63

2005 16,141 20 16,332 20 49,452 60

2006 19,896 22 16,221 18 53,156 60

2007 19,478 22 16,327 18 52,976 60

2008 20,899 24 16,326 18 51,607 58

2009 25,764 26 21,569 22 50,527 52

2010 26,800 28 23,472 24 45,913 48

2011 19,055 20 19,962 21 54,093 58

2012 23,281 26 26,604 29 41,158 45

2013 21,591 21 22,399 22 57,648 57

2014 24,472 21 28,590 25 62,230 54

2015 25,239 21 30,131 26 62,250 53

2016 29,315 23 36,825 29 59,505 47

2017 25,305 20 35,235 27 67,706 53

2018 18,653 16 30,538 26 69,549 59

2019 23,083 20 32,384 27 62,660 53

2020 30,345 23 37,585 28 66,928 50

Export

2004 8,522 26 15,412 47 8,981 27

2005 10,676 38 15,030 53 2,490 9

2006 13,541 40 15,240 45 4,714 14

2007 12,524 36 15,242 44 6,999 20

2008 14,492 38 15,089 39 8,798 23

2009 19,694 44 20,634 46 4,644 10

2010 20,506 45 21,864 48 2,779 6

2011 12,041 29 18,793 46 10,124 25

2012 14,598 37 25,124 63 104 0

2013 14,426 29 20,611 42 14,119 29

2014 17,231 31 26,791 48 11,251 20

2015 16,168 28 28,296 49 13,814 24

2016 19,693 30 34,968 54 10,336 16

2017 17,255 27 33,308 52 13,449 21

2018 10,402 20 28,695 55 13,507 26

2019 14,819 29 31,149 62 4,409 9

2020 20,810 31 36,026 53 10,981 16

Domestic

2004 6,533 12 1,641 3 44,556 84

2005 5,465 10 1,302 2 46,962 87

2006 6,355 11 982 2 48,442 87

2007 6,953 13 1,086 2 45,978 85

2008 6,407 13 1,237 2 42,809 85

2009 6,070 11 936 2 45,883 87

2010 6,294 12 1,608 3 43,134 85

2011 7,015 13 1,169 2 43,969 84

2012 8,683 17 1,480 3 41,054 80

2013 7,165 14 1,788 3 43,529 83

2014 7,241 12 1,799 3 50,979 85

2015 9,070 15 1,834 3 48,436 82

2016 9,622 16 1,857 3 49,169 81

2017 8,050 13 1,927 3 54,257 84

2018 8,251 12 1,843 3 56,042 85

2019 8,264 12 1,235 2 58,251 86

2020 9,535 14 1,559 2 55,947 83

Table 6: Tonnages and modal shares for U.S. soybeans, 2004-2020
13

Figure 11: U.S. soybean export shipments by mode, 2004-2020 

Figure 10: U.S. soybean domestic shipments by mode, 2004-2020

0

10

20

30

40

50

60

70

04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20

Million Tons

Year

Truck Barge Rail

0

10

20

30

40

50

60

70

04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20

Million Tons

Year

Truck

Barge

Rail
14

Sorghum Modal Shares

Year & 

type of 

movement

Mode of transport

Rail Barge Truck

1,000 tons Percent 1,000 tons Percent 1,000 tons Percent

Total

2004 2,334 21 852 8 7,698 71

2005 2,366 23 721 7 7,206 70

2006 3,426 37 730 8 5,127 55

2007 3,490 30 1,252 11 6,859 59

2008 3,779 30 634 5 8,006 64

2009 3,218 28 442 4 7,660 68

2010 2,886 31 315 3 6,019 65

2011 1,078 14 427 6 6,087 80

2012 653 10 577 9 5,468 82

2013 667 9 691 9 6,441 83

2014 4,873 39 1,046 8 6,633 53

2015 6,361 46 2,139 15 5,347 39

2016 5,127 37 225 2 8,362 61

2017 4,518 38 74 1 7,281 61

2018 3,257 36 43 0 5,716 63

2019 1,567 16 15 0 8,206 84

2020 4,851 44 44 0 6,196 56

Export

2004 1,776 35 852 17 2,460 48

2005 1,941 38 721 14 2,399 47

2006 2,886 55 730 14 1,590 31

2007 2,989 47 1,246 20 2,091 33

2008 3,253 56 622 11 1,938 33

2009 2,372 57 440 11 1,352 32

2010 2,307 56 309 7 1,526 37

2011 776 21 420 11 2,532 68

2012 120 6 485 24 1,386 70

2013 316 13 660 26 1,515 61

2014 4,528 58 1,033 13 2,309 29

2015 6,117 58 2,130 20 2,349 22

2016 4,903 65 212 3 2,451 32

2017 4,297 65 74 1 2,245 34

2018 3,137 73 40 1 1,143 26

2019 1,177 40 13 0 1,753 60

2020 4,732 65 44 1 2,466 34

Domestic

2004 558 10 0 0 5,238 90

2005 425 8 0 0 4,806 92

2006 540 13 0 0 3,538 87

2007 502 10 6 0 4,769 90

2008 527 8 11 0 6,068 92

2009 846 12 2 0 6,307 88

2010 579 11 5 0 4,493 88

2011 302 8 7 0 3,555 92

2012 534 11 92 2 4,082 87

2013 351 7 31 1 4,925 93

2014 345 7 13 0 4,324 92

2015 244 8 9 0 2,999 92

2016 224 4 13 0 5,911 96

2017 221 4 0 0 5,035 96

2018 120 3 4 0 4,574 97

2019 390 6 2 0 6,454 94

2020 119 3 0 0 3,730 97

Table 7: Tonnages and modal shares for U.S. sorghum, 2004-2020
15

Figure 13: U.S. sorghum export shipments by mode, 2004–2020

Figure 12: U.S. sorghum domestic shipments by mode, 2004–2020

0

2

4

6

8

10

12

04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20

Million Tons

Year

Truck

Barge

Rail

0

2

4

6

8

10

12

04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20

Million Tons

Year

Truck

Barge

Rail
16

Barley Modal Shares

Year & 

type of 

movement

Mode of transport

Rail Barge Truck

1,000 tons Percent 1,000 tons Percent 1,000 tons Percent

Total

2004 3,264 61 130 2 1,991 37

2005 3,182 60 207 4 1,944 36

2006 2,972 61 179 4 1,735 35

2007 3,028 53 247 4 2,413 42

2008 3,061 59 198 4 1,916 37

2009 2,803 60 68 1 1,814 39

2010 2,661 57 36 1 1,954 42

2011 2,550 57 123 3 1,784 40

2012 2,520 56 100 2 1,918 42

2013 2,751 59 83 2 1,814 39

2014 2,660 56 203 4 1,921 40

2015 2,593 56 109 2 1,947 42

2016 2,337 54 12 0 2,016 46

2017 2,109 56 9 0 1,681 44

2018 2,240 61 0 0 1,414 39

2019 1,570 40 0 0 2,324 60

2020 1,826 46 2 0 2,154 54

Export

2004 249 67 121 33 0 0

2005 680 81 159 19 0 0

2006 299 68 140 32 0 0

2007 626 75 206 25 0 0

2008 432 72 168 28 0 0

2009 93 70 39 30 0 0

2010 178 94 11 6 0 0

2011 218 100 0 0 0 0

2012 171 80 42 20 0 0

2013 173 80 44 20 0 0

2014 210 57 160 43 0 0

2015 272 81 64 19 0 0

2016 109 100 0 0 0 0

2017 140 95 7 5 0 0

2018 106 100 0 0 0 0

2019 130 100 0 0 0 0

2020 208 99 2 1 0 0

Domestic

2004 3,015 60 9 0 1,991 40

2005 2,502 56 48 1 1,944 43

2006 2,673 60 39 1 1,735 39

2007 2,402 49 41 1 2,413 50

2008 2,629 57 29 1 1,916 42

2009 2,711 60 29 1 1,814 40

2010 2,483 56 26 1 1,954 44

2011 2,332 55 123 3 1,784 42

2012 2,349 54 58 1 1,918 44

2013 2,578 58 39 1 1,814 41

2014 2,450 56 43 1 1,921 44

2015 2,320 54 45 1 1,947 45

2016 2,229 52 12 0 2,016 47

2017 1,969 54 2 0 1,681 46

2018 2,134 60 0 0 1,414 40

2019 1,441 38 0 0 2,324 62

2020 1,618 43 0 0 2,154 57

Table 8: Tonnages and modal shares for U.S. barley, 2004-2020
17

Figure 15: U.S. barley export shipments by mode, 2004–2020

Figure 14: U.S. barley domestic shipments by mode, 2004–2020

0

1

2

3

4

5

6

04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20

Million Tons 

Year

Truck

Barge

Rail

0

1

2

3

4

5

6

04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20

Million Tons 

Year

Truck

Barge

Rail
18

Modal shares are calculated for all grains and each grain type, based on the estimated modal tonnages. 

These modal shares are determined for total, export, and domestic movements.

Total Tonnages. The approach used to estimate modal tonnages and shares requires that total tonnages 

of grain transported to market be determined. It is also necessary to determine the portions of total 

tonnages transported to domestic and export markets. Total tonnages are defined as total disappearance 

minus grain that was grown and used on-farm. Total disappearance for this study is calculated using the 

ERS Wheat Outlook, Feed Outlook, and Oil Crop Outlook reports. These reports include marketing year 

supply and disappearance tables that list domestic use and exports. The Oil Crop Outlook lists these 

numbers by marketing year. The other two reports break the numbers down on a quarterly basis. To get 

disappearance numbers by calendar year, monthly totals are calculated from the marketing year data and 

added together into respective calendar year totals. 

Total Export. Total exports are calculated using export numbers reported in the ERS Outlook reports. 

Total Domestic. Total domestic tonnages are estimated by subtracting total export tonnages from total 

disappearance.

Grown and Used-on-Farm Totals. Grown and used-on-farm data are provided by ERS. These data 

are reported in percentages by year and commodity. Production numbers for each commodity are 

multiplied by the grown and used-on-farm percentages. Those numbers are then subtracted from total 

disappearance to get total transported grain tonnages. Grain grown and used on-farm must be deducted 

from total disappearance because it generates no commercial transportation demand.

Rail Total. Annual rail movements come from the STB Master Carload Waybill Sample. STB’s Waybill 

Sample is a stratified sample of carload waybills for terminated shipments by railroad carriers. The STB 

collects operating statistics on U.S. railroads, which can be used to estimate rail traffic volumes and 

railroad characteristics. Total tonnages are calculated using the billed weight in tons from the Waybill 

Sample and multiplying it by an expansion factor to estimate the tonnages for all grain movements by all 

railroads. Movements that originated and terminated in the same five-digit, Federal Information Processing 

Standards (FIPS) region are assumed to be short hauls, which would be double-counted and, thus, were 

deleted. Some grain is moved by a combination of rail and barge. Since this represents a relatively small 

amount of grain, these movements are not included in the rail calculations. Instead, they are counted in 

the barge movements—the final mode used to transport the grain. There are other instances in which 

grain shipments are rebilled from one railroad to another at terminal markets. Such a movement would be 

considered a double-count of grain movements. An attempt is made to minimize the rebilled movements. 

Again, as with the rail-to-barge movements, these types of shipments represent a small portion of total 

rail shipments.

Rail Export. Export regions are defined by five-digit FIPS codes and are listed in Appendix B. The regions 

chosen are based on methodology from the 1998 modal share report as those regions with ports in the 

Pacific Northwest, Atlantic Coast, and Gulf of Mexico. Rail exports to the Great Lakes are determined from 

grain delivery information at Duluth-Superior, MN, and Toledo, OH. Total tonnages exported are then 

calculated using the designated export regions. Movements that originated and terminated in the same 

five-digit FIPS region are assumed to be short hauls, which would be double-counted and, thus, were 

deleted. 

Rail Domestic. Domestic rail tonnages are estimated by subtracting export grain tonnages moved by rail 

from total grain tonnages moved by rail.

Appendix A: Modal Share Methodology
19

Barge Total. Annual barge movement data, which are collected and compiled by the U.S. Army Corps of 

Engineers, are obtained from Waterborne Commerce of the United States. The categories used to calculate 

modal shares for barge are river shipping range (origin) and river receiving range (destination). Total 

movements are determined by summing the total of all receiving ranges. As explained in the Rail Total 

section above, when barge and rail are used in combination to ship grain, with barge being the final mode 

in the transportation route, only the barge movement is included. 

Barge Export. The following river receiving ranges are used to find barge export movements: Atlantic, 

Pacific, Central Gulf, East Gulf, and West Gulf. Any movement that is received into a port in the defined 

regions is determined to be an export movement. The receiving ranges are based on the 1998 report’s 

methodology. For that report, export barge modal shares were calculated using barge export tonnages 

based on internal grain and oilseed receipts reported on the inland waterways. Movements were defined 

as those to: 1) Kalama and Vancouver, WA, and Portland, OR, on the Columbia-Snake River system; 

2) Baton Rouge through New Orleans, LA, to the mouth of the passes on the Mississippi River system; 

3) Lake Charles, LA, on the Calcasieu River; 4) Mobile, AL, on the Tennessee-Tombigbee River system; 

5) Pascagoula, MS, on the Gulf Intracoastal Waterway; 6) Beaumont and Port Arthur, TX; 7) Galveston Bay 

(including Houston), TX; 8) Corpus Christi, TX, and the Gulf Intracoastal Waterway ports between Corpus 

Christi and the Mexican border; and 9) Hampton Roads and Norfolk, VA, on the Chesapeake Bay.

Barge Domestic. Domestic barge movements are calculated by subtracting export barge movements 

from total barge movements.

Truck Total. Total truck tonnages are estimated by subtracting total rail and total barge from total 

disappearance. The method for estimating truck grain tonnages and modal shares assumes that all 

barge and rail tonnages represent “long-haul” movements. “Short-haul” movements (farm-to-elevator) 

that originate on the farm are almost exclusively done by truck. Such farm-to-elevator movements 

are considered gathering movements. Unlike barge or rail movements that typically end at the point of 

domestic consumption or export, these truck movements represent only the first and shortest segment of 

the entire shipping route for grain. 

Truck Export. Truck export tonnages are estimated by subtracting rail export and barge export tonnages 

from total export tonnages.

Truck Domestic. Domestic truck tonnages are estimated by subtracting domestic rail and domestic barge 

tonnages from total domestic tonnages.
20

2

Appendix B: FIPS Regions Included in Rail 

Export Tonnages

State/country FIPS code County

Canada & Mexico 0 All areas

Alabama 1003 Baldwin

Alabama 1097 Mobile

Arizona 4023 Santa Cruz

California 6025 Imperial

California 6073 San Diego

Georgia 13051 Chatham

Georgia 13127 Glynn

Louisiana 22019 Calcasieu

Louisiana 22023 Cameron

Louisiana 22033 East Baton Rouge

Louisiana 22051 Jefferson

Louisiana 22063 Livingston

Louisiana 22071 Orleans

Louisiana 22075 Plaquemines

Louisiana 22089 St. Charles

Louisiana 22093 St. James

Louisiana 22095 St. John the Baptist

Louisiana 22121 West Baton Rouge

Minnesota 27137 St. Louis 

Mississippi 28045 Hancock

Mississippi 28047 Harrison

Mississippi 28059 Jackson

Ohio 39043 Erie

Ohio 39095 Lucas

Oregon 41009 Columbia

Oregon 41051 Multnomah

South Carolina 45019 Charleston

South Carolina 45053 Jasper

Texas 48061 Cameron

Texas 48141 El Paso

Texas 48167 Galveston

Texas 48201 Harris

Texas 48245 Jefferson

Texas 48323 Maverick

Texas 48355 Nueces

Texas 48361 Orange

Texas 48377 Presidio

Texas 48409 San Patricio

Texas 48479 Webb

Virginia 51710 Norfolk

Washington 53011 Clark

Washington 53015 Cowlitz

Washington 53033 King

Washington 53053 Pierce

Wisconsin 55031 Douglas

Wisconsin 55079 Milwaukee

22