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EXHIBIT 24.1 POWER OF ATTORNEY Landstar System, Inc.
Annual Report on Form 10-K
for fiscal year ended 12/25/04 KNOW ALL MEN BY THESE PRESENTS, that the undersigned does hereby make, constitute and appoint
Henry H. Gerkens and Robert C. LaRose, and each of them, with full power in each to act without
the other, his true and lawful attorney-in-fact and agent, in his name, place and stead to
execute on his behalf, as an officer and/or director of Landstar System, Inc. (the Company),
the Annual Report on Form 10-K of the Company for the fiscal year ended December 25, 2004, and
file the same with all exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission (the SEC) pursuant to Sections 13 or 15(d) of the
Securities Exchange Act of 1934, as amended (the Act), and any and all other instruments which
either of said attorneys-in-fact and agents deems necessary or advisable to enable the Company
to comply with the Act, the rules, regulations and requirements of the SEC in respect thereof,
giving and granting to each of said attorneys-in-fact and agents full power and authority to do
and perform each and every act and thing whatsoever necessary or appropriate to be done in and
about the premises as fully to all intents as he might or could do if personally present at the
doing thereof, with full power of substitution and resubstitution, hereby ratifying and
confirming all that his said attorneys-in-fact and agents or substitutes may or shall lawfully
do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand on the date indicated below. /s/ David G. Bannister   DATED: February 28, 2005




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POWER OF ATTORNEY Landstar System, Inc.
Annual Report on Form 10-K
for fiscal year ended 12/25/04 KNOW ALL MEN BY THESE PRESENTS, that the undersigned does hereby make, constitute and appoint
Henry H. Gerkens and Robert C. LaRose, and each of them, with full power in each to act without
the other, his true and lawful attorney-in-fact and agent, in his name, place and stead to
execute on his behalf, as an officer and/or director of Landstar System, Inc. (the Company),
the Annual Report on Form 10-K of the Company for the fiscal year ended December 25, 2004, and
file the same with all exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission (the SEC) pursuant to Sections 13 or 15(d) of the
Securities Exchange Act of 1934, as amended (the Act), and any and all other instruments which
either of said attorneys-in-fact and agents deems necessary or advisable to enable the Company
to comply with the Act, the rules, regulations and requirements of the SEC in respect thereof,
giving and granting to each of said attorneys-in-fact and agents full power and authority to do
and perform each and every act and thing whatsoever necessary or appropriate to be done in and
about the premises as fully to all intents as he might or could do if personally present at the
doing thereof, with full power of substitution and resubstitution, hereby ratifying and
confirming all that his said attorneys-in-fact and agents or substitutes may or shall lawfully
do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand on the date indicated below. /s/ Ronald W. Drucker   DATED February 28, 2005




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POWER OF ATTORNEY Landstar System, Inc.
Annual Report on Form 10-K
for fiscal year ended 12/25/04 KNOW ALL MEN BY THESE PRESENTS, that the undersigned does hereby make, constitute and appoint
Henry H. Gerkens and Robert C. LaRose, and each of them, with full power in each to act without
the other, his true and lawful attorney-in-fact and agent, in his name, place and stead to
execute on his behalf, as an officer and/or director of Landstar System, Inc. (the Company),
the Annual Report on Form 10-K of the Company for the fiscal year ended December 25, 2004, and
file the same with all exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission (the SEC) pursuant to Sections 13 or 15(d) of the
Securities Exchange Act of 1934, as amended (the Act), and any and all other instruments which
either of said attorneys-in-fact and agents deems necessary or advisable to enable the Company
to comply with the Act, the rules, regulations and requirements of the SEC in respect thereof,
giving and granting to each of said attorneys-in-fact and agents full power and authority to do
and perform each and every act and thing whatsoever necessary or appropriate to be done in and
about the premises as fully to all intents as he might or could do if personally present at the
doing thereof, with full power of substitution and resubstitution, hereby ratifying and
confirming all that his said attorneys-in-fact and agents or substitutes may or shall lawfully
do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the
undersigned has hereunto set his hand on the date indicated below. /s/ William S. Elston   DATED: February 28, 2005




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POWER OF ATTORNEY Landstar System, Inc.
Annual Report on Form 10-K
for fiscal year ended 12/25/04 KNOW ALL MEN BY THESE PRESENTS, that the undersigned does hereby make, constitute and appoint
Henry H. Gerkens and Robert C. LaRose, and each of them, with full power in each to act without
the other, his true and lawful attorney-in-fact and agent, in his name, place and stead to
execute on his behalf, as an officer and/or director of Landstar System, Inc. (the Company),
the Annual Report on Form 10-K of the Company for the fiscal year ended December 25, 2004, and
file the same with all exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission (the SEC) pursuant to Sections 13 or 15(d) of the
Securities Exchange Act of 1934, as amended (the Act), and any and all other instruments which
either of said attorneys-in-fact and agents deems necessary or advisable to enable the Company
to comply with the Act, the rules, regulations and requirements of the SEC in respect thereof,
giving and granting to each of said attorneys-in-fact and agents full power and authority to do
and perform each and every act and thing whatsoever necessary or appropriate to be done in and
about the premises as fully to all intents as he might or could do if personally present at the
doing thereof, with full power of substitution and resubstitution, hereby ratifying and
confirming all that his said attorneys-in-fact and agents or substitutes may or shall lawfully
do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the
undersigned has hereunto set his hand on the date indicated below. /s/ Diana M. Murphy   DATED: February 28, 2005




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POWER OF ATTORNEY Landstar System, Inc.
Annual Report on Form 10-K
for fiscal year ended 12/25/04 KNOW ALL MEN BY THESE PRESENTS, that the undersigned does hereby make, constitute and appoint
Henry H. Gerkens and Robert C. LaRose, and each of them, with full power in each to act without
the other, his true and lawful attorney-in-fact and agent, in his name, place and stead to
execute on his behalf, as an officer and/or director of Landstar System, Inc. (the Company),
the Annual Report on Form 10-K of the Company for the fiscal year ended December 25, 2004, and
file the same with all exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission (the SEC) pursuant to Sections 13 or 15(d) of the
Securities Exchange Act of 1934, as amended (the Act), and any and all other instruments which
either of said attorneys-in-fact and agents deems necessary or advisable to enable the Company
to comply with the Act, the rules, regulations and requirements of the SEC in respect thereof,
giving and granting to each of said attorneys-in-fact and agents full power and authority to do
and perform each and every act and thing whatsoever necessary or appropriate to be done in and
about the premises as fully to all intents as he might or could do if personally present at the
doing thereof, with full power of substitution and resubstitution, hereby ratifying and
confirming all that his said attorneys-in-fact and agents or substitutes may or shall lawfully
do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand on the date indicated below. /s/ Jeffrey C. Crowe   DATED: February 28, 2005




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POWER OF ATTORNEY Landstar System, Inc.
Annual Report on Form 10-K
for fiscal year ended 12/25/04 KNOW ALL MEN BY THESE PRESENTS, that the undersigned does hereby make, constitute and appoint
Henry H. Gerkens and Robert C. LaRose, and each of them, with full power in each to act without
the other, his true and lawful attorney-in-fact and agent, in his name, place and stead to
execute on his behalf, as an officer and/or director of Landstar System, Inc. (the Company),
the Annual Report on Form 10-K of the Company for the fiscal year ended December 25, 2004, and
file the same with all exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission (the SEC) pursuant to Sections 13 or 15(d) of the
Securities Exchange Act of 1934, as amended (the Act), and any and all other instruments which
either of said attorneys-in-fact and agents deems necessary or advisable to enable the Company
to comply with the Act, the rules, regulations and requirements of the SEC in respect thereof,
giving and granting to each of said attorneys-in-fact and agents full power and authority to do
and perform each and every act and thing whatsoever necessary or appropriate to be done in and
about the premises as fully to all intents as he might or could do if personally present at the
doing thereof, with full power of substitution and resubstitution, hereby ratifying and
confirming all that his said attorneys-in-fact and agents or substitutes may or shall lawfully
do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has hereunto set his hand on the date indicated below. /s/ Merritt J. Mott   DATED: February 28, 2005