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Exhibit 31 CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO
SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, W. Keith Kennedy, Jr. certify that:  1.
    I have reviewed this annual report on Form 10-K of CNF Inc.;2.
    Based on my knowledge, this report does not contain any untrue statement of a material
fact or omit to state a material fact necessary to make the statements made, in light of
the circumstances under which such statements were made, not misleading with respect to the
period covered by this report;3.
    Based on my knowledge, the financial statements, and other financial information
included in this report, fairly present in all material respects the financial condition,
results of operations and cash flows of the registrant as of, and for, the periods
presented in this report;4.
    The registrants other certifying officers and I are responsible for establishing and
maintaining disclosure controls and procedures and internal control over financial
reporting (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and
have:  a.
    designed such disclosure controls and procedures, or caused such
disclosure controls and procedures to be designed under our supervision, to ensure
that material information relating to the registrant, including its consolidated
subsidiaries, is made known to us by others within those entities, particularly
during the period in which this quarterly report is being prepared;b.
    designed internal control over financial reporting, or caused such
internal control over financial reporting to be designed under our supervision, to
provide reasonable assurance regarding the reliability of financial reporting and
the preparation of financial statements for external purposes in accordance with
generally accepted accounting principles;c.
    evaluated the effectiveness of the registrants disclosure controls and
procedures and presented in this report our conclusions about the effectiveness of
the disclosure controls and procedures, as of the end of the period covered by this
report based on such evaluation; andd.
    disclosed in this report any change in the registrants internal control over financial
reporting that occurred during the registrants most recent fiscal quarter (the registrants fourth fiscal
quarter in the case of an annual report) that has materially affected, or is
reasonably likely to materially affect, the registrants internal control over
financial reporting; and  5.
    The registrants other certifying officers and I have disclosed, based on our most
recent evaluation of internal control over financial reporting, to the registrants
auditors and the audit committee of the registrants board of directors (or persons
performing the equivalent functions):  a.
    all significant deficiencies and material weaknesses in the design or
operation of internal controls over financial reporting which are reasonably likely
to adversely affect the registrants ability to record, process, summarize and
report financial information; andb.
    any fraud, whether or not material, that involves management or other
employees who have a significant role in the registrants internal controls over
financial reporting. /s/ W. Keith Kennedy, Jr.March 14, 2005W. Keith Kennedy, Jr.
Interim Chief Executive Officer




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CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO
SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Chutta Ratnathicam, certify that: 1. I have reviewed this annual report on Form 10-K of CNF Inc.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or
omit to state a material fact necessary to make the statements made, in light of the circumstances
under which such statements were made, not misleading with respect to the period covered by this
report; 3. Based on my knowledge, the financial statements, and other financial information included in
this report, fairly present in all material respects the financial condition, results of operations
and cash flows of the registrant as of, and for, the periods presented in this report; 4. The registrants other certifying officers and I are responsible for establishing and
maintaining disclosure controls and procedures and internal control over financial reporting (as
defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have: a. designed such disclosure controls and procedures, or caused such disclosure controls and
procedures to be designed under our supervision, to ensure that material information relating to
the registrant, including its consolidated subsidiaries, is made known to us by others within those
entities, particularly during the period in which this quarterly report is being prepared; b. designed internal control over financial reporting, or caused such internal control over
financial reporting to be designed under our supervision, to provide reasonable assurance regarding
the reliability of financial reporting and the preparation of financial statements for external
purposes in accordance with generally accepted accounting principles; c. evaluated the effectiveness of the registrants disclosure controls and procedures and presented
in this report our conclusions about the effectiveness of the disclosure controls and procedures,
as of the end of the period covered by this report based on such evaluation; and d. disclosed in this report any change in the registrants internal control over financial
reporting that occurred during the registrants most recent fiscal quarter (the registrants
fourth fiscal quarter in the case of an annual report) that has materially affected, or is
reasonably likely to materially affect, the registrants internal control over financial reporting;
and 5. The registrants other certifying officers and I have disclosed, based on our most recent
evaluation of internal control over financial reporting, to the registrants auditors and the audit
committee of the registrants board of directors (or persons performing the equivalent functions): a. all significant deficiencies and material weaknesses in the design or operation of internal
controls over financial reporting which are reasonably likely to adversely affect the registrants
ability to record, process, summarize and report financial information; and d. any fraud, whether or not material, that involves management or other employees who have a
significant role in the registrants internal controls over financial reporting. /s/ Chutta RatnathicamMarch 14, 2005Chutta RatnathicamChief Financial Officer