Federal Communications Commission
445 12th St., S.W.
News Media Information 202 / 418-0500
Internet: https://www.fcc.gov 
Washington, D.C. 20554
Released: June 27, 2014
WIRELESS TELECOMMUNICATIONS BUREAU SEEKS COMMENT ON ASSOCIATION OF
AMERICAN RAILROADS REQUEST FOR WAIVER TO PERMIT SIGNAL BOOSTERS WITH
INCREASED POWER ON CERTAIN 450 MHz BAND RAILROAD FREQUENCIES
WT Docket No. 14-98
Comment Date: July 28, 2014
Reply Comment Date: August 12, 2014
By this Public Notice, comment is sought on a request for waiver of the Commission’s Rules
filed by the Association of American Railroads (AAR) concerning use of signal boosters to maintain
communications between the fronts and rears of trains.1
Specifically, AAR seeks waiver of Sections
90.219(d)(3), which limits Part 90 signal booster power to five watts effective radiated power (ERP), and
90.261(f), which prohibits secondary fixed operations on certain frequencies designated for specialized
AAR seeks waiver to allow use of frequencies from 452/457.900 MHz to 452/457.96875 MHz3 for
signal boosters with an ERP of thirty watts in areas where coverage is unsatisfactory due to distance or
intervening terrain barriers.
AAR explains that safe, efficient movement of trains relies on communications links between the
fronts and rears of trains to monitor speed and brake pressure; operate rear-end brakes; and, on trains with
distributed power, coordinate the front and rear engines.4
It states that the options currently permitted by
the Commission’s rules do not provide sufficient coverage to maintain this communications link on long
trains in areas of challenging terrain, such as where tracks make sharp turns around mountain passes or
encounter quick inclines and declines along hilly terrain, and trackside signal boosters are needed to
maintain the link.5
As a result, AAR requests waivers of Sections 90.219(d)(3) and 90.261(f) to allow
secondary fixed operation of trackside signal boosters with thirty watts ERP in areas where coverage is
unsatisfactory due to distance or intervening terrain barriers. We seek comment on the waiver request.
1 Request for Waiver filed on June 13, 2014 by AAR (Request).
2 See 47 C.F.R. §§ 90.219(d)(3), 90.261(f).
3 Specifically, frequencies 452/457.900, 452/457.90625, 452/457.9125, 452/457.91875, 452/457.925,
452/457.93125, 452/457.9375, 452/457.94375, 452/457.950, 452/457.95625, 452/457.9625, and 452/457.96875
MHz. AAR is the mandatory certified frequency coordinator for these frequencies. See 47 C.F.R. § 90.35(b)(2)(iv),
4 See Request at 2-3.
5 See id. at 3-4.
Interested parties may file comments and reply comments in response to the waiver request on or
before the dates listed on the first page of this Public Notice. All pleadings must reference WT 14-98.
Comments may be filed using the Commission's Electronic Comment Filing System (ECFS) or by filing
paper copies. See Electronic Filing of Documents in Rulemaking Proceedings, 63 Fed. Reg. 24121
Comments filed through the ECFS can be sent as an electronic file via the Internet to http://
www.fcc.gov/cgb/ecfs/ . Generally, only one copy of an electronic submission must be filed. If multiple
docket or rulemaking numbers appear in the caption of this proceeding, however, commenters must
transmit one electronic copy of the comments to each docket or rulemaking number referenced in the
caption. In completing the transmittal screen, commenters should include their full name, U.S. Postal
Service mailing address, and the applicable docket or rulemaking number. Parties may also submit an
electronic comment by Internet e-mail. To get filing instructions for e-mail comments, commenters
should send an e-mail to firstname.lastname@example.org , and should include the following words in the body of the
message, “get form.” A sample form and directions will be sent in reply.
Parties who choose to file by paper must file an original and one copy of each filing. If more than
one docket or rulemaking number appears in the caption of this proceeding, commenters must submit two
additional copies for each additional docket or rulemaking number.
Filings can be sent by hand or messenger delivery, by commercial overnight courier, or by first-
class or overnight U.S. Postal Service mail. All filings must be addressed to the Commission's Secretary,
Office of the Secretary, Federal Communications Commission.
-Deliver hand-delivered or messenger-delivered paper filings to FCC Headquarters at 445 12th St.,
S.W., Room TW-A325, Washington, DC 20554. All hand deliveries must be held together with rubber
bands or fasteners. Envelopes must be disposed of before entering the building. The filing hours at this
location are 8:00 a.m. to 7:00 p.m.
-Commercial overnight mail (other than U.S. Postal Service Express Mail and Priority Mail) must
be sent to 9300 East Hampton Drive, Capitol Heights, MD 20743.
-U.S. Postal Service first-class mail, Express Mail, and Priority Mail should be addressed to 445
12th Street, S.W., Washington, DC 20554.
Parties are requested to send one copy of their comments and reply comments to Best Copy and
Printing, Inc., Portals II, 445 12th Street, S.W., Room CY-B402, Washington, DC 20554, (800) 378-
3160, e-mail FCC@BCPIWEB.com.
The request, and comments and reply comments filed in response to this Public Notice are
available for viewing via the Commission's Electronic Comment Filing System (ECFS) by entering the
docket number, WT 14-98. The documents also will be available for public inspection and copying
during business hours in the FCC Reference Information Center, Portals II, 445 12th Street S.W., Room
CY-A257, Washington, D.C. 20554. They may also be purchased from Best Copy and Printing, Inc.,
telephone (800) 378-3160, facsimile (202) 488-5563, TTY (202) 488-5562, e-mail
Alternate formats of this Public Notice (computer diskette, large print, audio recording, and
Braille) are available to persons with disabilities by contacting the Consumer & Governmental Affairs
Bureau at (202) 418-0530 (voice), (202) 418-0432 (TTY), or send an e-mail to email@example.com.
This proceeding has been designated as a “permit-but-disclose” proceeding in accordance with
the Commission's ex parte rules.6
Persons making ex parte presentations must file a copy of any written
presentation or a memorandum summarizing any oral presentation within two business days after the
presentation (unless a different deadline applicable to the Sunshine period applies). Persons making oral
ex parte presentations are reminded that memoranda summarizing the presentation must (1) list all
persons attending or otherwise participating in the meeting at which the ex parte presentation was made,
and (2) summarize all data presented and arguments made during the presentation. If the presentation
consisted in whole or in part of the presentation of data or arguments already reflected in the presenter’s
written comments, memoranda or other filings in the proceeding, the presenter may provide citations to
such data or arguments in his or her prior comments, memoranda, or other filings (specifying the relevant
page and/or paragraph numbers where such data or arguments can be found) in lieu of summarizing them
in the memorandum. Documents shown or given to Commission staff during ex parte meetings are
deemed to be written ex parte presentations and must be filed consistent with rule 1.1206(b). In
proceedings governed by rule 1.49(f) or for which the Commission has made available a method of
electronic filing, written ex parte presentations and memoranda summarizing oral ex parte presentations,
and all attachments thereto, must be filed through the electronic comment filing system available for that
proceeding, and must be filed in their native format (e.g., .doc, .xml, .ppt, searchable .pdf). Participants in
this proceeding should familiarize themselves with the Commission’s ex parte rules.
For further information, contact Mr. Rodney Conway of the Mobility Division, Wireless
Telecommunications Bureau, at (202) 418-2904 or via e-mail at firstname.lastname@example.org.
Action by the Deputy Chief, Mobility Division, Wireless Telecommunications Bureau.
- FCC -
6 See 47 C.F.R. §§ 1.1200(a), 1.1206.
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