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Exhibit 10(f)

FIRST AMENDMENT TO OFFICE LEASE

        THIS FIRST AMENDMENT TO OFFICE LEASE (this "First Amendment") is made as
of the 1st day of July, 2004 by and between TDC CANADA, INC., a Canadian
corporation and WACKER GP, INC., a Delaware corporation (collectively,
"Landlord") and QUIXOTE CORPORATION, a Delaware corporation ("Tenant"),

WITNESSETH:

        A.    Landlord and Tenant entered into a certain office lease (the
"Lease") dated August 30, 2003, whereby Landlord leased to Tenant certain
premises (the "Original Premises") consisting of 18,789 rentable square feet of
office space on the eleventh (11th) floor (Suite 1100) of that certain office
building located at 35 East Wacker Drive, Chicago, Illinois, for a lease term to
expire on February 28, 2019.

        B.    Landlord and Tenant desire to amend the Lease to reflect the lease
by Landlord to Tenant of certain additional space located on the eleventh (11th)
floor of the aforesaid building, subject to the terms and conditions hereinafter
set forth.

        NOW, THEREFORE, for good and valuable consideration, the receipt and
legal sufficiency of which are hereby acknowledged, Landlord and Tenant hereby
agree as follows:

        1.    Definitions.    Each capitalized term used in this First Amendment
shall have the same meaning as is ascribed to such capitalized term in the
Lease, unless otherwise provided for herein.

        2.    First Additional Space.    

        (a)   Landlord leases to Tenant and Tenant leases from Landlord those
certain premises (the "First Additional Space") containing 125 rentable square
feet of office space located on the eleventh (11th) floor (Suite 1110) of the
Building, as shown on Exhibit A attached hereto. The First Additional Space is
leased for a lease term commencing on July 1, 2004 and expiring on February 28,
2019, unless sooner terminated as provided in the Lease and subject to renewal
as provided in Paragraph 2(e) below. Tenant may take occupancy of the First
Additional Space on or after the full execution of this First Amendment. The
First Additional Space is leased upon all of the same terms and provisions as
are contained in the Lease, except as otherwise provided in this First Amendment
or as may be inconsistent with the provisions of this First Amendment. From and
after the full execution of this First Amendment, all references in the Lease to
"Premises" shall mean and refer to the Original Premises and the First
Additional Space, collectively.

        (b)   Effective as of July 1, 2004, Tenant shall pay Base Rent for the
First Additional Space in the following amounts for the following periods:

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FIRST ADDITIONAL SPACE (125 RSF)

PERIOD

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  MONTHLY
BASE RENT

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  ANNUAL
BASE RENT

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  ANNUAL BASE
RENT PER RSF

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7/1/04 - 2/28/05   $ 255.21   $
2,041.68
(8 months)   $ 24.50
3/1/05 - 2/28/06
 
 
260.42
 
 
3,125.00
 
 
25.00
3/1/06 - 2/28/07
 
 
265.63
 
 
3,187.50
 
 
25.50
3/1/07 - 2/29/08
 
 
270.83
 
 
3,250.00
 
 
26.00
3/1/08 - 2/28/09
 
 
276.04
 
 
3,312.50
 
 
26.50
3/1/09 - 2/28/10
 
 
281.25
 
 
3,375.00
 
 
27.00
3/1/10 - 2/28/11
 
 
286.46
 
 
3,437.50
 
 
27.50
3/1/11 - 2/29/12
 
 
291.67
 
 
3,500.00
 
 
28.00
3/1/12 - 2/28/13
 
 
296.88
 
 
3,562.50
 
 
28.50
3/1/13 - 2/28/14
 
 
302.08
 
 
3,625.00
 
 
29.00
3/1/14 - 2/28/15
 
 
307.29
 
 
3,687.50
 
 
29.50
3/1/15 - 2/29/16
 
 
312.50
 
 
3,750.00
 
 
30.00
3/1/16 - 2/28/17
 
 
317.71
 
 
3,812.50
 
 
30.50
3/1/17 - 2/28/18
 
 
322.92
 
 
3,875.00
 
 
31.00
3/1/18 - 2/28/19
 
 
328.13
 
 
3,937.50
 
 
31.50

        (c)   Effective as of July 1, 2004, Tenant shall pay Additional Rent
under Section 4.2 of the Lease for the First Additional Space and with respect
to the First Additional Space, (i) "Base Year" shall mean 2004, and
(ii) "Tenant's Share" shall mean 0.0241%.

        (d)   Exhibit B attached to the Lease shall apply to the First
Additional Space, but with respect to the First Additional Space, "Landlord's
Allowance" (or the "Allowance" or "Landlord's Contribution") shall mean and be
$8,125.00 (i.e., $65.00 per rentable square foot of the First Additional Space).
By taking possession of the First Additional Space hereunder, Tenant accepts the
First Additional Space as being in good order, condition and repair, and
otherwise "As-Is", "Where-Is" and with all faults, known or unknown.

        (e)   Section 28.4 of the Lease shall apply to the First Additional
Space, and Tenant shall have two (2) options to extend the Term for the First
Additional Space for five (5) years each, subject to the terms and conditions of
said Section 28.4.

        (f)    Section 28.5 of the Lease shall apply to the First Additional
Space, and Tenant shall have the right to terminate the Lease, as hereby
amended, with respect to the First Additional Space, subject to the terms and
conditions of said Section 28.5. For purposes of Section 28.5B of the Lease, the
portion of the termination fee payable with respect to the First Additional
Space shall be an amount equal to all of the transaction costs (pertaining to
this First Amendment), to the extent the same remain unamortized (at an interest
factor of 8%).

        3.    Broker.    Tenant represents to Landlord that Tenant has not dealt
with any real estate broker, salesperson or finder in connection with this First
Amendment, and no such person initiated or participated in the negotiation of
this First Amendment or is entitled to any commission in connection herewith.
Tenant hereby agrees to indemnify, defend and hold Landlord, its property
manager and their respective agents and employees harmless from and against any
and all liabilities, claims, demands, actions, damages, costs and expenses
(including attorneys' fees) arising from either (a) a claim for a fee or
commission made by any broker claiming to have acted by or on behalf of Tenant
in connection with this First Amendment, or (b) a claim of, or right to, lien
under the Statutes of Illinois, relating to real estate broker liens with
respect to any broker retained by Tenant. Landlord agrees to pay any commissions
owing to the Broker by reason of this First Amendment pursuant to separate
agreement between Landlord and the Broker.

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        4.    Anti-Terrorism Representation.    Neither Tenant nor any of its
affiliates or constituents nor, to the best of Tenant's knowledge (without
independent investigation or inquiry), any brokers or other agents of same, have
engaged in any dealings or transactions, directly or indirectly (i) in
contravention of any U.S., international or other money laundering regulations
or conventions, including, without limitation, the United States Bank Secrecy
Act, the United States Money Laundering Control Act of 1986, the United States
International Money Laundering Abatement and Anti-Terrorist Financing Act of
2001, Trading with the Enemy Act (50 U.S.C. §1 et seq., as amended), or any
foreign asset control regulations of the United States Treasury Department (31
CFR, Subtitle B, Chapter V, as amended) or any enabling legislation or executive
order relating thereto, or (ii) in contravention of Executive Order No. 13224
dated September 24, 2001 issued by the President of the United States (Executive
Order Blocking Property and Prohibiting Transactions with Persons Who Commit,
Threaten to Commit, or Support Terrorism), as may be amended or supplemented
from time to time ("Anti-Terrorism Order") or on behalf of terrorists or
terrorist organizations, including those persons or entities that are included
on any relevant lists maintained by the United Nations, North Atlantic Treaty
Organization, Organization of Economic Cooperation and Development, Financial
Action Task Force, U.S. Office of Foreign Assets Control, U.S. Securities &
Exchange Commission, U.S. Federal Bureau of Investigation, U.S. Central
Intelligence Agency, U.S. Internal Revenue Service, or any country or
organization, all as may be amended from time to time. Neither Tenant nor any of
its affiliates or constituents nor, to the best of Tenant's knowledge, any
brokers or other agents of same, (i) are or will be conducting any business or
engaging in any transaction with any person appearing on the U.S. Treasury
Department's Office of Foreign Assets Control list of restrictions and
prohibited persons, or (ii) are a person described in section 1 of the
Anti-Terrorism Order, and to the best of Tenant's knowledge (without independent
investigation or inquiry), neither Tenant nor any of its affiliates have engaged
in any dealings or transactions, or otherwise been associated with any such
person. If at any time this representation becomes false then it shall be
considered a default under the Lease, as amended hereby, and Landlord shall have
the right to exercise all of the remedies set forth in the Lease in the event of
a default or to terminate the Lease immediately.

        5.    Submission.    Submission of this First Amendment by Landlord to
Tenant for examination and/or execution shall not in any manner bind Landlord
and no obligations on Landlord shall arise under this First Amendment unless and
until this First Amendment is fully signed and delivered by Landlord and Tenant;
provided, however, the execution and delivery by Tenant of this First Amendment
to Landlord shall constitute an irrevocable offer by Tenant on the terms and
conditions herein contained, which offer may not be revoked for fifteen
(15) days after such delivery.

        6.    Limitation of Liability.    The provisions of Section 23 of the
Lease are incorporated herein by this reference and shall expressly apply with
respect to this First Amendment.

        7.    Binding Effect.    The Lease, as heretofore and hereby amended,
shall continue in full force and effect, subject to the terms and provisions
thereof and hereof. This First Amendment shall be binding upon and inure to the
benefit of Landlord, Tenant and their respective successors and permitted
assigns.

        8.    Conflict.    In the event of any conflict between the terms of the
Lease and the terms of this First Amendment, the terms of this First Amendment
shall control.

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IN WITNESS WHEREOF, this First Amendment is executed as of the day and year
aforesaid.

  TENANT:
 
QUIXOTE CORPORATION, a Delaware corporation
 
By:
 
/s/  DANIEL P. GOREY      

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  Title:   Vice President and Chief Financial Officer

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LANDLORD:
 
TDC CANADA, INC., a Canadian corporation
 
By:
 
/s/  RUDY BANDUCCI      

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  Title:   Vice President

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WACKER GP, INC., a Delaware corporation
 
By:
 
/s/  RUDY BANDUCCI      

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  Title:   Vice President

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FIRST AMENDMENT TO OFFICE LEASE