TRANSPORT CORPORATION OF AMERICA, INC. EXHIBIT 11.1 Computation of Earnings (Loss) per Common Share (In thousands, except share and per share amounts) THREE MONTHS ENDED DECEMBER 31, ------------------------------------------- 2000 1999 1998 - ------------------------------------------------------------------------------------------- Net earnings (loss) $ 849 $ (406) $ 3,202 - ------------------------------------------------------------------------------------------- Average number of common shares outstanding 7,177,955 7,114,456 6,702,275 Average number of common shares outstanding, non-detachable put 1,117,337 1,200,000 1,200,000 - ------------------------------------------------------------------------------------------- Average number of common shares outstanding, including non-detachable put 8,295,292 8,314,456 7,902,275 Dilutive effect of outstanding stock options and warrants 292 0 33,874 Dilutive effect of non-detachable put option 2,640,493 0 472,001 - ------------------------------------------------------------------------------------------- Average number of common and common equivalent shares outstanding 10,936,077 8,314,456 8,408,150 - ------------------------------------------------------------------------------------------- Basic earnings (loss) per share $ 0.10 $ (0.05) $ 0.41 Diluted earnings (loss) per share $ 0.08 $ (0.05) $ 0.38 =========================================================================================== YEARS ENDED DECEMBER 31, ------------------------------------------- 2000 1999 1998 - ------------------------------------------------------------------------------------------- Net earnings $ 4,673 $ 8,276 $ 10,656 - ------------------------------------------------------------------------------------------- Average number of common shares outstanding 7,171,589 6,942,481 6,699,833 Average number of common shares outstanding, attributable to non-detachable put 1,145,533 1,200,000 600,000 - ------------------------------------------------------------------------------------------- Average number of common shares outstanding, including non-detachable put 8,317,122 8,142,481 7,299,833 Dilutive effect of outstanding stock options and warrants 12,139 29,461 63,367 Dilutive effect of non-detachable put option 1,739,746 398,507 157,334 - ------------------------------------------------------------------------------------------- Average number of common and common equivalent shares outstanding 10,069,007 8,570,449 7,520,534 - ------------------------------------------------------------------------------------------- Basic earnings per share $ 0.56 $ 1.02 $ 1.46 Diluted earnings per share $ 0.46 $ 0.97 $ 1.42 ===========================================================================================