[Federal Register Volume 66, Number 196 (Wednesday, October 10, 2001)]
[Proposed Rules]
[Pages 51629-51635]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 01-25428]
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DEPARTMENT OF TRANSPORTATION
National Highway Traffic Safety Administration
49 CFR Parts 571 and 587
[Docket No. NHTSA-01-10435]
RIN 2127-AI05
Federal Motor Vehicle Safety Standards; Side Impact Protection;
Fuel System Integrity
AGENCY: National Highway Traffic Safety Administration (NHTSA),
Department of Transportation.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: Pursuant to the agency's grant of a petition for rulemaking
from Mr. James E. Stocke, NHTSA proposes to update the Federal motor
vehicle safety standards on side impact protection and fuel system
integrity by requiring that radial tires of certain specifications,
rather than bias ply tires, be used on the moving barriers specified in
these standards. In conjunction with that proposal, NHTSA also proposes
to delete certain outdated or incorrect specifications for the moving
barriers in those standards.
DATES: You should submit your written comments so that they are
received by December 10, 2001.
ADDRESSES: You may submit your comments in writing to: Docket
Management, Room PL-401, 400 Seventh Street, SW, Washington, DC, 20590.
Alternatively, you may submit your comments electronically by logging
onto the Docket Management System (DMS) website at http://dms.dot.gov.
Click on ``Help & Information'' or ``Help/Info'' to view instructions
for filing your comments electronically. Regardless of how you submit
your comments, you should mention the docket number of this document.
FOR FURTHER INFORMATION CONTACT:
For technical and policy issues: Dr. William Fan, Office of
Crashworthiness Standards, NPS-11, National Highway Traffic Safety
Administration, 400 Seventh Street, SW, Washington, DC 20590.
Telephone: (202) 366-4922. Fax: (202) 366-4329.
For legal issues: Nancy Bell, Attorney Advisor, Office of the Chief
Counsel, NCC-20, National Highway Traffic Safety Administration, 400
Seventh Street, SW, Washington, DC 20590. Telephone: (202) 366-2992.
Fax: (202) 366-3820.
SUPPLEMENTARY INFORMATION:
I. Background
Federal Motor Vehicle Safety Standard (FMVSS) No. 214, Side impact
protection (49 CFR 571.214), and FMVSS No. 301, Fuel system integrity
(49 CFR 571.301), specify impact tests using moving barriers. Paragraph
S6.10 of FMVSS No. 214 contains specifications for a moving deformable
barrier. FMVSS No. 301 contains specifications for two 1,814 kilogram
(4,000 pound) rigid moving barriers, a flat rigid moving barrier
(Paragraphs S7.2 and S7.3) \1\ and a contoured rigid
[[Page 51630]]
moving barrier (Paragraph S7.5). Both FMVSS No. 301 barriers are used
to assess vehicle fuel system integrity. The FMVSS No. 301 flat rigid
moving barrier is used for testing passenger cars, multipurpose
passenger vehicles, trucks and buses with a gross vehicle weight rating
(GVWR) of 4,536 kilograms (10,000 pounds) or less, and the FMVSS No.
301 contoured rigid barrier is used for testing large school buses with
a GVWR greater than 4,536 kilograms (10,000 pounds). The FMVSS No. 214
barrier is a 1,367 kilogram (3,000 pound) moving deformable barrier
used for testing passenger cars, and multipurpose passenger vehicles,
trucks and buses with a GVWR of 2,722 kilograms (6,000 pounds) or less
in side impact crashes. G78-15 bias ply tires are currently specified
for the FMVSS No. 301 barriers.\2\
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\1\ The FMVSS No. 301 flat rigid moving barrier is identical to
the moving barrier specified for the lateral moving barrier test in
paragraph S8.2 of FMVSS No. 208, Occupant crash protection (49 CFR
571.208). At this time, the tire specifications in S8.2 of FMVSS No.
208 will not be amended. FMVSS No. 208's lateral moving barrier
crash test was part of an optional requirement for automatic
restraint systems which can no longer be utilized by manufacturers
to certify their vehicles. Vehicle manufacturers are currently
required to fulfill a more stringent requirement by installing air
bags and Type 2 seat belts in both front outboard designated seating
positions.
\2\ Paragraph S7.5.4 of FMVSS No. 301 specifies G78-15 bias ply
tires for use on the contoured rigid moving barrier. The
requirements for the FMVSS No. 301 flat rigid moving barrier do not
specify bias ply tires, but, in practice, the flat rigid moving
barrier utilizes the identical under-structure and G78-15 bias ply
tires as the contoured rigid moving barrier.
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The tire specifications for the FMVSS No. 214 moving barrier are
not set out in FMVSS No. 214. Rather, S6.10 of FMVSS No. 214 refers to
the moving barrier specified in 49 CFR Part 587, Side Impact Moving
Deformable Barrier. The tire specifications for that barrier are
contained in Drawing DSL-1278, Sheet 2 of 2, Item -11 and Note 8. Item
-11 specifies ``Bias belted tire (BF Goodrich--G78-15 CLM).'' On
October 1991, Note 8 was added to drawing DSL-1278 that states ``Bias
belted tire, size P215/75B15, may be substituted for that specified in
-11. Inflate to recommended pressure.''
II. Petition for Rulemaking
On February 3, 2000, Mr. James E. Stocke, a retired automotive
safety engineer, submitted a petition for rulemaking requesting that
NHTSA amend FMVSS No. 301 to require that the moving barrier assembly
be equipped with P205/75R15 radial tires inflated to 207 kPa (30 psi),
replacing the currently required G78-15 bias ply tires inflated to 165
kPa (24 psi).
In his petition, Mr. Stocke stated that the bias tire size
designation referenced in FMVSS No. 301 was outdated 15 years ago and
that bias tires are no longer readily available because they have been
replaced with radial tires. Mr. Stocke noted that the Society of
Automotive Engineers, Inc. (SAE) J972 Recommended Practice ``Moving
Barrier Collision Tests'' was revised (in August 1997) to specify both
P205/75R15 radial tires and G78-15 bias ply tires for use on moving
barriers.\3\
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\3\ SAE is an organization which develops voluntary standards
for aerospace, automotive and other industries. Many of SAE's
recommended practices are developed using technical information
supplied by vehicle manufacturers and automotive test laboratories.
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Additionally, Mr. Stocke stated that a P205/75R15 tire inflated to
207 kPa (30 psi) is equivalent to a G78-15 tire inflated to 165 kPa (24
psi). Also, he asserted that the tread width specification for the bias
ply tire would not be necessary for a radial tire specification because
the radial tire size designation (width to height ratio) is sufficient
to define the tread width. Accordingly, Mr. Stocke suggested amending
FMVSS No. 301 to read as follows: ``The moving barrier assembly is
equipped with P205/75R15 pneumatic tires inflated to 207 kPa.'' In a
letter dated August 16, 2000, NHTSA granted Mr. Stocke's petition for
rulemaking.
III. NHTSA's Response to Petition
In reviewing Mr. Stocke's petition, we were guided by a number of
considerations. First, with the increased use of the radial tire design
over the past 30 years in the U.S., the bias ply tire design has become
virtually obsolete.\4\ The manufacture and use of bias ply tires has
largely been replaced by the manufacture and use of radial tires.
Consequently, bias tires are not readily available to testing
laboratories at present and will become even more difficult for the
laboratories to obtain in the future. Also, as the petitioner points
out, the SAE Recommended Practice for ``Moving Barrier Collision
Tests'' now includes specifications for radial tires as well as for
bias ply tires. Both P205/75R15 and P215/75R15 radial tires are readily
available at present and are widely recommended for use by vehicle
manufacturers on passenger cars, small passenger vans, and small sport
utility vehicles.
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\4\ According to the Rubber Manufacturers Association's
``Factbook 2000,'' original equipment radial tires shipment sales
surpassed those of bias ply tires by a wide margin in the early
1970s. In 1999, radial tires shipments comprised 99.8% of the
replacement market.
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Another consideration for the agency is the possible effect on ride
height (the height at the center of gravity) and vertical motion
(bounce) of a moving barrier if tires different from those currently
specified in FMVSS Nos. 214 and 301 are used on those barriers. Bias
ply tires and radial tires are different in design and construction,
and they exhibit different performance characteristics. For instance,
bias ply tires have their inner carcass cords laid at an angle of about
50 degrees to the center line of the tread, and cords in successive
plies (two or four) usually run in a criss-cross fashion--an
arrangement which serves to equalize cord tensions. On the other hand,
radial tires have cords which run at right angles to the center line of
the tread and parallel to the radius of the tire. The radial
construction creates a tread which is stiffer and a sidewall which is
more flexible than that of a bias ply tire. These factors may affect
the performance of moving barriers as discussed below.
The moving barrier tests in FMVSS Nos. 214 and 301 specify a static
barrier ride height, an important impact parameter measurement.
Further, the Laboratory Test Procedure in FMVSS No. 214 provides a
guideline for barrier vertical displacement. Because a radial tire has
a lower profile and a more flexible sidewall than a bias ply tire, the
use of radial tires, rather than bias ply tires, on the moving barriers
specified in FMVSS Nos. 214 and 301 could affect the barrier ride
height (the center of gravity height and/or barrier contact height).
Additionally, if an improper tire inflation pressure is used, it may
affect the barrier's vertical motion as it is being towed during the
test.
IV. Related Barrier Tire Research
P215/75R15 Radial Tires
Recently, Ford Motor Company (Ford) conducted a barrier tire study
(Ford Study) to better understand the effect of tires on testing done
pursuant to FMVSS No. 214 and 96/27/EC, the European Union side impact
directive.\5\ This study included investigating vertical and horizontal
displacements of the barriers, quantifying cart/barrier behavior at
impact, and evaluating factors that may contribute to noncompliance
with the requirements of the regulations.
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\5\ Ford engineers have provided a copy of their summary report
to NHTSA. Test details are not currently available. A copy of the
summary report is available in the docket for this Notice.
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The Ford Study was based on data derived from 34 U.S. side impact
tests and 16 European side impact tests conducted in 1997.\6\ Three
principal
[[Page 51631]]
variables in the study were (1) release mechanisms (pins/chains), (2)
tire types (bias/radial) and (3) tire pressures (103 kPa (15 psi)/221
kPa (32 psi)). The study indicated that all 34 U.S. side impact tests
were within the horizontal displacement specification of +/-50 mm (2
inches) and approximately three-fourths of the tests were within the
vertical displacement guideline of +/-20 mm (0.8 inch). More
specifically, the test data indicated that the barriers with the P215/
75R15 radial tires inflated to 221 kPa (32 psi) were able to meet the
+/-20 mm (0.8 inch) guideline in almost 100% of the tests. After
careful review of this extensive study, NHTSA has tentatively concluded
that the P215/75R15 radial tire inflated to 221 kPa (32 psi) is an
appropriate alternative to the G78-15 bias ply tire for use on the
FMVSS No. 214 barrier.
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\6\ The Ford Study recommended conducting eight additional tests
to measure the barrier motion. Ford did not conduct the additional
tests because it concluded that no new information would be derived
from resulting data. NHTSA concurs with Ford's decision that the 34
Ford side impact tests and the 16 European tests provide a
sufficient data basis for analysis.
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P205/75R15 Radial Tires
As mentioned previously, SAE J972 was recently revised to specify
that P205/75R15 radial tires inflated to 207 kPa (30 psi), as well as
G78-15 bias ply tires inflated to 165 kPa (24 psi), may be used on all
1,814 kilogram (4,000 pound) moving barriers. Because SAE will not
issue a Recommended Practice that has not been approved by its test
engineers and auto industry representatives, NHTSA believes that
vehicle manufacturers and their test laboratories have already tested
and accepted the revised SAE J972 Recommended Practice. NHTSA,
following the SAE Recommended Practice, tentatively concludes that the
P205/75R15 tires inflated to 207 kPa (30 psi) are appropriate for use
on both of the 1,814 kilogram (4,000 pound) moving barriers specified
in FMVSS No. 301. Accordingly, NHTSA has tentatively concluded that the
P205/75R15 radial tires inflated to 207 kPa (30 psi) is an appropriate
alternative to the G78-15 bias ply tire for use on the FMVSS No. 301
barriers.
V. Agency Proposal
A. Radial Tire Size and Inflation Pressure
While NHTSA has tentatively made conclusions concerning the use of
one tire (the P215/75R15 tire inflated to 221 kPa (32 psi)) for the
FMVSS No. 214 moving barrier and another tire (the P205/75R15 tire
inflated to 207 kPa (30 psi)) for the FMVSS No. 301 moving barriers,
the agency recognizes that it would be easier for test laboratories to
use only one size tires for FMVSS Nos. 214 and 301 moving barriers. The
agency therefore proposes specifying either P215/75R15 tires inflated
to 221 kPa (32 psi) for use on FMVSS Nos. 214 and 301 moving barriers
or P205/75R15 tires inflated to 207 kPa (30 psi) for use on FMVSS Nos.
214 and 301 moving barriers. In other words, NHTSA plans to pick one of
these tires and specify it in the final rule for both barriers.
As discussed above, the ride height and vertical motion of a moving
barrier determine the impact location and the height of the moving
barrier can have an effect on test results. Prior to making a final
decision, the agency will assess the extent to which the substitution
of a single tire may have unintended effects on either (1) the ride
height, or (2) the impact performance of the FMVSS Nos. 214 and 301
moving barriers. For example, in attempting to find a set of
appropriate radial tires (tire size and inflation pressure) for use on
the FMVSS No. 214 barrier, NHTSA is concerned that a set of four
incorrectly inflated tires could result in excessive barrier vertical
motion during the towing process, which could make it difficult to stay
within the +/-20 mm (0.8 inch) vertical displacement guideline.\7\
NHTSA solicits comments and laboratory test data concerning these
matters.
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\7\ To control the impact height in the impact test in FMVSS No.
214, NHTSA's Office of Vehicle Safety Compliance specifies a
vertical displacement guideline of +/-20 mm (0.8 inch) in its
Laboratory Test Procedure. (This guideline only applies to NHTSA
contractors conducting FMVSS No. 214 side impact compliance tests.)
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B. Other Issues
Tread Width
NHTSA concurs with petitioner's comments that the tread width
specification for radial tires is not necessary since the radial tire
size designation is sufficient to define tread width. For instance, the
first three numbers in the P205/75R15 radial tire designation indicate
that the tire width is 205 mm. The Tire and Rim Association, Inc.
Yearbooks contain a chart to define the maximum dimensions of grown
tires in service.\8\ According to the chart, the maximum tire tread
width of a 75 series aspect ratio tire is 80 percent of the overall
width. Mr. Stocke is correct that the tread width of P205/75R15 tires
(205 mm x 0.8 = 164 mm) is within the specification in FMVSS No. 301
for tire width of 152 mm +/-25 mm (6.0 in. +/-1.0 in.). Likewise, the
P215/75R15 tires are within that specification (215 mm x 0.8 = 172
mm). In addition, FMVSS No. 214 does not specify any tire tread width.
Therefore, NHTSA proposes that the tread width specification be deleted
from the tire specifications in FMVSS No. 301.
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\8\ A ``grown'' tire means that a tire has experienced a growth
or a stretch of its fabric during service. Some tire tables show an
allowance on the maximum tire dimensions to compensate for this
``growth.'' To prevent the tire from rubbing the vehicle, vehicle
manufacturers use this maximum number in their vehicle designs.
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Moments of Inertia
Data received from NHTSA's contractors and from the Vehicle
Research and Test Center at East Liberty, Ohio (VTRC) indicate that it
is extremely difficult, if not impossible, to construct the FMVSS No.
301 contoured moving barrier in accordance with both the center of
gravity and the moments of inertia specified in FMVSS No. 301.\9\
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\9\ The moment of inertia is the quantitative measure of the
rotational inertia of a body, i.e., the opposition that the body
exhibits to having its speed of rotation about an axis altered by
the application of a torque (turning force).
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The FMVSS No. 301 moving contoured barrier test was initially based
on an old SAE Recommended Practice which included specifications for
moments of inertia, as well as dimensional drawings and a specified
center of gravity. In its rulemaking for the FMVSS No. 301 contoured
moving barrier (40 FR 18469, April 28, 1975; 40 FR 47790, October 15,
1975), NHTSA retained the SAE Recommended Practice specifications of
measurement, but made modifications to the original SAE design by
lowering the front face of the barrier design by 178 mm (7 inches).
With this modification, the moments of inertia derived from the SAE
Recommended Practice are difficult to achieve. However, there has been
no reason to believe that the actual barriers utilized by the agency
and by manufacturers have yielded inappropriate results.
Based on the current measurements, excepting the moments of
inertia, the FMVSS No. 301 contoured moving barrier can be constructed
to the barrier specifications with the dimensional drawings and the
specified center of gravity. There are no moments of inertia specified
for the FMVSS No. 301 flat moving barrier. Therefore, NHTSA proposes
that the moment of inertia specifications for the contoured moving
barrier be removed from FMVSS No. 301.
VI. Rulemaking Analyses and Notices
Executive Order 12866 (Federal Regulation) and DOT Regulatory Policies
and Procedures
This notice has not been reviewed under E.O. 12866. After
considering the
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impacts of this rulemaking action, we have determined that the action
is not significant within the meaning of the Department of
Transportation regulatory policies and procedures. The intent of the
rulemaking action is to update regulatory procedures that have been in
effect for over 25 years. In most cases, the effect of the proposed
amendments would be to relax or eliminate burdens on regulated
entities. This action does not involve a substantial public interest or
controversy. The rulemaking action would not have a substantial impact
on any transportation safety program or on state and local governments.
The impacts are so minimal as not to warrant the preparation of a full
regulatory evaluation. The tires specified in the proposed rule are
more readily available than those currently specified, and they are
already widely recommended by voluntary standards organizations for use
by vehicle manufacturers for testing. Accordingly, there will be no
increase in the cost of tires used for testing, and we do not
anticipate any impact on the ability to conduct valid tests or any
other impact on the cost or ease of testing.
Regulatory Flexibility Act
In compliance with the Regulatory Flexibility Act (5 U.S.C. 601-
612), we have evaluated the effects of this rule on small entities.
NHTSA certifies that this action would not have a significant economic
impact on a substantial number of small entities. This action merely
replaces an outdated tire specification for testing devices with an
equivalent current tire specification.
Paperwork Reduction Act
Under the Paperwork Reduction Act of 1995 (PRA) (44 U.S.C. 3501,
et. seq.), Federal agencies must obtain approval from the Office of
Management and Budget (OMB) for each collection of information they
conduct, sponsor, or require through regulations. NHTSA has reviewed
this proposal and determined that it does not contain collection of
information requirements.
Unfunded Mandates Reform Act of 1995
This rule would not impose a Federal mandate resulting in the
expenditure by State, local, and tribal governments, in the aggregate,
or by the private sector, of $ 100 million or more in any one year. (2
U.S.C. 1531 et seq.).
Executive Order 12778 (Civil Justice Reform)
This proposed rule would not have any retroactive effect. Under
section 49 U.S.C. 30103, whenever a Federal motor vehicle safety
standard is in effect, a state may not adopt or maintain a safety
standard applicable to the same aspect of performance which is not
identical to the Federal standard, except to the extent that the state
requirement imposes a higher level of performance and applies only to
vehicles procured for the State's use. 49 U.S.C. 30161 sets forth a
procedure for judicial review of final rules establishing, amending or
revoking Federal motor vehicle safety standards. That section does not
require submission of a petition for reconsideration or other
administrative proceedings before parties may file suit in court.
Executive Order 13045 (Protection of Children)
We have analyzed this action under Executive Order 13045,
Protection of Children from Environmental Health Risks and Safety
Risks. This rule is not an economically significant rule and does not
concern an environmental risk to health or safety that may
disproportionately affect children.
Executive Order 12630 (Taking of Private Property)
This rule will not effect a taking of private property or otherwise
have taking implications under Executive Order 12630, Governmental
Actions and Interference with Constitutionally Protected Property
Rights.
National Environmental Policy Act
The agency has analyzed this action for the purposes of the
National Environmental Policy Act of 1969, as amended (42 U.S.C. 4321
et seq.) and has determined that this action would not have any effect
on the quality of the environment.
Executive Order 13132 (Federalism)
E.O. 13132 (64 FR 43255, August 10, 1999), revokes and replaces
E.O.'s 12612 ``Federalism'' and 12875 ``Enhancing the Intergovernmental
Partnership.'' E.O. 13132 requires NHTSA to develop an accountable
process to ensure ``meaningful and timely input by State and local
officials in the development of regulatory policies that have
federalism implications.'' E.O. 13132 defines the term ``Policies that
have federalism implications'' to include regulations that have
``substantial direct effects on the States, on the relationship between
the national government and the States, or on the distribution of power
and responsibilities among the various levels of government.'' Under
E.O. 13132, NHTSA may not issue a regulation that has federalism
implication, that imposes substantial direct compliance costs, and that
is not required by statute, unless the Federal government provides the
funds necessary to pay the direct compliance costs incurred by State
and local governments, or NHTSA consults with State and local officials
early in the process of developing the proposed regulation.
The proposed rule would not have substantial direct effects on the
States, on the relationship between the national government and the
States, or on the distribution of power and responsibilities among the
various levels of government as specified in E.O. 13132. Thus, the
requirements of section 6 of the Executive Order do not apply to this
rule.
Plain Language
E.O. 12866 requires each agency to write all rules in plain
language. Application of the principles of plain language include
consideration of the following questions:
--Have we organized the material to suit the public's needs?
--Are the requirements in the proposed rule clearly stated?
--Does the proposed rule contain technical language or jargon that
is unclear?
--Would a different format (grouping and order of sections, use of
heading, paragraphing) make the rule easier to understand?
--Would more (but shorter) sections be better?
--Could we improve clarity by adding tables, lists, or diagrams?
--What else could we do to make the rule easier to understand?
If you have any responses to these questions, please include them
in your comments on this document.
VII. Comments
How Do I Prepare and Submit Comments?
Your comments must be written and in English. To ensure that your
comments are correctly filed in the Docket, please include the docket
number of this document in your comments.
Your comments must not be more than 15 pages long. (49 CFR 553.21).
We established this limit to encourage you to write your primary
comments in a concise fashion. However, you may attach necessary
additional documents to your comments. There is no limit on the length
of the attachments.
Please submit two copies of your comments, including the
attachments, to Docket Management at the address given above under
ADDRESSES.
[[Page 51633]]
How Can I Be Sure That My Comments Were Received?
If you wish Docket Management to notify you upon its receipt of
your comments, enclose a self-addressed, stamped postcard in the
envelope containing your comments. Upon receiving your comments, Docket
Management will return the postcard by mail.
How Do I Submit Confidential Business Information?
If you wish to submit any information under a claim of
confidentiality, you should submit three copies of your complete
submission, including the information you claim to be confidential
business information, to the Chief Counsel, NHTSA, at the address given
above under FOR FURTHER INFORMATION CONTACT. In addition, you should
submit two copies, from which you have deleted the claimed confidential
business information, to Docket Management at the address given above
under ADDRESSES. When you send a comment containing information claimed
to be confidential business information, you should include a cover
letter setting forth the information specified in our confidential
business information regulation. (49 CFR Part 512.)
Will the Agency Consider Late Comments?
We will consider all comments that Docket Management receives
before the close of business on the comment closing date indicated
above under DATES. To the extent possible, we will also consider
comments that Docket Management receives after that date.
How Can I Read the Comments Submitted by Other People?
You may read the comments received by Docket Management at the
address given above under ADDRESSES. The hours of the Docket are
indicated above in the same location.
You may also see the comments on the Internet. To read the comments
on the Internet, take the following steps:
(1) Go to the Docket Management System (DMS) Web page of the
Department of Transportation (http://dms.dot.gov/).
(2) On that page, click on ``search.''
(3) On the next page (http://dms.dot.gov/search/), type in the
four-digit docket number shown at the beginning of this document.
Example: If the docket number were ``NHTSA-1999-1234,'' you would type
``1234.'' After typing the docket number, click on ``search.''
(4) On the next page, which contains docket summary information for
the docket you selected, click on the desired comments.
You may download the comments. However, since the comments are
imaged documents, instead of word processing documents, the downloaded
comments are not word searchable.
Please note that even after the comment closing date, we will
continue to file relevant information in the Docket as it becomes
available. Further, some people may submit late comments. Accordingly,
we recommend that you periodically check the Docket for new material.
List of Subjects
49 CFR Part 571
Imports, Motor vehicle safety, Motor vehicles, Rubber and rubber
products, Tires.
49 CFR Part 587
Incorporation by reference, Motor vehicle safety.
In consideration of the foregoing, we propose to amend 49 CFR parts
571 and 587 as follows:
PART 571--FEDERAL MOTOR VEHICLE SAFETY STANDARDS
1. The authority citation for part 571 would continue to read as
follows:
Authority: 49 U.S.C. 322, 30111, 30115, 30166 and 30177;
delegation of authority at 49 CFR 1.50.
2. Section 571.301 would be amended by revising S7.5.2, S7.5.4 and
S7.5.5; by removing S7.5.6; and by adding S7.6 to read as follows:
Sec. 571.301 Standard No. 301; Fuel system integrity.
* * * * *
S7.5.2 The moving contoured barrier, including the impact surface,
supporting structure, and carriage, has a mass of 1,814 kg
23 kg with the mass distributed so that 408 kg 11 kg is at
each rear wheel and 499 kg 11 kg is at each front wheel.
The center of gravity is located 1,372 mm 38 mm rearward
of the front wheel axis, in the vertical longitudinal plane of
symmetry, 401 mm above the ground.
* * * * *
S7.5.4 The concrete surface upon which the vehicle is tested is
level, rigid, and of uniform construction, with a skid number of 75
when measured in accordance with American Society of Testing and
Materials Method E; 274-65T at 64 km/h, omitting water delivery as
specified in paragraph 7.1 of that method.
S7.5.5 The barrier assembly is released from the guidance mechanism
immediately prior to impact with the vehicle.
S7.6
[Alternative 1]
The moving barrier assemblies specified in S7.2, S7.3 and S7.5 are
equipped with P215/75R15 pneumatic tires inflated to 221 kPa.
[Alternative 2]
The moving barrier assemblies specified in S7.2, S7.3 and S7.5 are
equipped with P205/75R15 pneumatic tires inflated to 207 kPa.
* * * * *
3. Figure 2 at the end of section 571.301 would be revised to read
as follows: [blank page for figure 2]
BILLING CODE 4910-59-P
[[Page 51634]]
[GRAPHIC] [TIFF OMITTED] TP10OC01.010
BILLING CODE 4910-59-C
[[Page 51635]]
PART 587--DEFORMABLE BARRIERS
4. The authority citation for part 587 would continue to read as
follows:
Authority: 49 U.S.C. 322, 30111, 30115, 30117, 30166 and 30177;
delegation of authority at 49 CFR 1.50.
5. Section 587.6 would be amended by revising paragraph (b)(1) to
read as follows:
Sec. 587.6 General description.
* * * * *
(b)(1) The specifications for the final assembly of the moving
deformable barrier are provided in the drawings shown in DSL-1278,
dated [date of the final drawing change].
* * * * *
Issued on: October 4, 2001.
Stephen R. Kratzke,
Associate Administrator for Safety Performance Standards.
[FR Doc. 01-25428 Filed 10-9-01; 8:45 am]
BILLING CODE 4910-59-P