
[Federal Register Volume 76, Number 32 (Wednesday, February 16, 2011)]
[Proposed Rules]
[Pages 8990-8992]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-3267]


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DEPARTMENT OF TRANSPORTATION

Federal Motor Carrier Safety Administration

49 CFR Parts 385, 386, 390, and 395

[Docket No. FMCSA-2004-19608]
RIN 2126-AB26


Hours of Service of Drivers; Availability of Supplemental 
Documents and Corrections to Notice of Proposed Rulemaking

AGENCY: Federal Motor Carrier Safety Administration (FMCSA), DOT.

ACTION: Notice of Proposed Rulemaking; notice of availability of 
supplemental documents and corrections; extension of comment period.

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SUMMARY: This document advises the public that FMCSA has placed in the 
public docket three additional documents concerning hours of service 
(HOS) for commercial motor vehicle drivers. This notice also makes 
clerical corrections to both the preamble and the regulatory text of 
FMCSA's notice of proposed rulemaking (NPRM) on HOS requirements, which 
was published in the Federal Register on December 29, 2010. Finally, 
the notice extends the public comment period for the NPRM from February 
28, 2011 to March 4, 2011.

DATES: Comments on the NPRM are due by March 4, 2011.

FOR FURTHER INFORMATION CONTACT: Mr. Thomas Yager, Chief, Driver and 
Carrier Operations Division, Federal Motor Carrier Safety 
Administration, U.S. Department of Transportation, 1200 New Jersey 
Avenue, SE., Washington, DC 20590, (202) 366-4325.

[[Page 8991]]


SUPPLEMENTARY INFORMATION: 

Availability of Supplemental Documents

    For a full background on this rulemaking, please see the preamble 
to the December 2010 HOS NPRM (75 FR 82170; December 29, 2010). The 
docket for this rulemaking (FMCSA-2004-19608) contains all of the 
background information for this rulemaking, including comments. As 
explained more fully below, this notice calls attention to three 
supplemental documents that FMCSA has placed as electronic files in the 
docket:
     FMCSA-2004-19608-6147--Response to January 28, 2011, 
Request from American Trucking Associations, Inc. for Further 
Information on the Cumulative Fatigue Function Used in Docket Item 
Number FMCSA-2004-19608-4116 Titled ``2010-2011 Hours of Service Rule 
Regulatory Impact Analysis for the Proposed Hours of Service (HOS) of 
Drivers Rule, December 20, 2010''.
     FMCSA-2004-19608-6147.1--An Excel Spreadsheet presenting 
the information requested by ATA: Coefficient estimates, an explanation 
of the coefficient names, and the formulas for the cumulative fatigue 
function used in Chapter 4 of the Regulatory Evaluation for the HOS 
NPRM, and displayed graphically in Exhibit 4-14 of that document.
     FMCSA-2004-19608-6147.2--An Excel Spreadsheet containing a 
column of data using the formula in the HOS Regulatory Evaluation to 
link the hours worked in the previous week to fatigue the following 
week.
    On January 28, 2011, ATA requested further information on 
``Analyses of Fatigue-Related Large Truck Crashes, The Assignment of 
Critical Reason, and Other Variables Using the Large Truck Crash 
Causation Study, May 30, 2008.'' The study at issue estimated the 
impact that cumulative hours worked have on driver fatigue, and FMCSA 
used the study to calculate some of the safety benefits associated with 
the reduced driver working hours the Agency proposed in the NPRM. FMCSA 
placed the study, which analyzed Large Truck Crash Causation Study 
data, in the HOS docket (FMCSA-2004-19608-3481). While the study 
provides a detailed description of the analysis and methodology, it did 
not include the actual coefficients estimated for the cumulative 
fatigue function that linked greater working hours in a week with 
increased fatigue involvement in the following week. ATA requested 
those coefficients on January 28, 2011, so it could recreate the safety 
benefit calculations FMCSA used in the Regulatory Impact Analysis. On 
February 1, 2011, FMCSA sent ATA the spreadsheets with a cover memo. 
FMCSA has docketed both the memo and the spreadsheets.
    The coefficients for the cumulative fatigue function from the 2008 
study are shown in Table 1.

Table 1--Coefficients for the Cumulative Fatigue Function From ``Analyses of Fatigue-Related Large Truck Crashes, the Assignment of Critical Reason, and
                                       Other Variables Using the Large Truck Crash Causation Study, May 30, 2008''
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                           Chi Square
              Figure                     Variable            DF           Term         Standard error       statistic                 P-value
--------------------------------------------------------------------------------------------------------------------------------------------------------
5................................  Intercept...........          1          -3.70411          0.343315          116.4078  Less than 0.000001.
5................................  Last................          1           0.03717          0.006648           31.2692  Less than 0.000001.
--------------------------------------------------------------------------------------------------------------------------------------------------------

    These coefficients relate fatigue involvement to total hours worked 
the week before the crash. The formula using these coefficients is as 
follows:
    Prob (driver fatigue) = 1/(1+exp(3.70411-0.03717*last), where 
``last'' is the number of hours the driver worked in the last week and 
``driver fatigue'' is the probability that the driver was coded as 
fatigued at the time of the crash.
    There are two accompanying spreadsheets. The first, docketed at 
FMCSA-2004-19608-6147.1, presents the coefficient estimates, 
explanation of the coefficient names, and the formulas for the 2008 
study for figure 5, which contains the cumulative fatigue formula. The 
second spreadsheet, docketed at FMCSA-2004-19608-6147.2, contains a 
column of data using the formula from the 2008 study to link hours 
worked in the previous week to fatigue involvement percentages the 
following week. This column includes the raw predicted values from the 
estimated equation. Because FMCSA used baseline estimates of average 
work and fatigue involvement in the Regulatory Impact Analysis docketed 
at FMCSA-2004-19608-4116, the fatigue-involvement predicted values from 
the equation were scaled so that the average work and fatigue levels 
predicted by the equation (for all hours) would equal the averages used 
in the Regulatory Impact Analysis. The second column of fatigue 
percentages presents these scaled values, which are only slightly 
different from the raw values estimated directly from the equation. 
FMCSA used a look-up table for scaling the individual hours of work in 
the previous week. Look-up tables act like step functions: a reduction 
of 10.7 hours is treated as though it is a reduction of 11 hours (it 
goes to the next step), and so forth. The use of this methodology may 
result in slightly higher estimated benefits for each option, compared 
to using exact values. The differences in total benefits for the 
central case, between the lookup function and actual raw values, would 
have been no more than a few percent; they would not have affected the 
net benefits of the options relative to one another, or significantly 
changed their attractiveness from a cost-benefit standpoint.
    The spreadsheet containing these values and formulas incorporates 
two worksheets, one titled ``Parameters'' and another titled ``Driving 
Hours Data.'' The formula coefficients are presented in cells B87 
through B90 of the ``Driving Hours Data'' worksheet. The cells in A92 
through C137 use the coefficients to link work hours (contained in 
Column A, cells A93-A137) to fatigue involvement percentages in Column 
B (contained in cells B93-137). Column C (cells C93-137) presents the 
values scaled to our average work (52 hours per week of work) and 
fatigue involvement (13 percent).
    FMCSA is extending the comment period for all comments on the NPRM, 
not just on the issues raised in this notice, so everyone may have an 
opportunity to review this formula and its data.

Corrections to Notice of Proposed Rulemaking

    In addition, FMCSA makes the following clerical corrections to the 
HOS NPRM published in the Federal Register on December 29, 2010 (75 FR 
82170):

[[Page 8992]]

    1. Page 82177. Correct footnote 17 to read as follows:

    \17\ Balkin, T., Thorne, D., Sing, H., Thomas, M., Redmond, D., 
Wesensten, N., Williams, J., Hall, S. & Belenky, G.,''Effects of 
Sleep Schedules on Commercial Vehicle Driver Performance,'' 2000. 
FMCSA-2004-19608-2007.

    2. Page 82178. Correct footnote 31 to read as follows:

    \31\ Fu, J.S., Calcagno, J.A., Davis, W.T., Boulet, J.A.M. & 
Wasserman, J.F., ``Improving Heavy-Duty Diesel Truck Ergonomics to 
Reduce Fatigue and Improve Driver Health and Performance,'' FMCSA, 
December 2010.

    3. Page 82179. Correct the third sentence in the last paragraph of 
the third column to read: ``An answer would turn on knowing the total 
number of crashes in each hour and the percentage of driving that takes 
place in each hour.''
    4. Page 82182, correct footnote 39 to read as follows:

    \39\ Van Dongen, H.P.A. & Belenky, G., ``Investigation into 
Motor Carrier Practices to Achieve Optimal Commercial Motor Vehicle 
Driver Performance: Phase I,'' December 2010. FMCSA-2004-19608-4120.

    5. Page 82182. Correct footnote 45 to read as follows:

    \45\ Van Dongen, H.P.A., Jackson, M. & Belenky, G., ``Duration 
of Restart Period Needed to Recycle with Optimal Performance: Phase 
II,'' FMCSA, December 2010. FMCSA-2004-19608-4440.

    6. Page 82183. Correct the sentence that begins on the fourth line 
from the bottom of the second column to read, ``Because one of the team 
members drives while the other takes his or her break, the result of 
the rule is that the non-working driver has to take both periods in the 
sleeper berth because it is not possible to log the shorter time as off 
duty while he or she is `in or upon any commercial motor vehicle.' ''
    7. Page 82187. Correct the sentence that begins on the ninth line 
of the second column to read, ``To analyze the safety impacts of these 
changes, the Agency has developed a series of functions that relate 
fatigue-coded crashes to hours of daily driving and hours of weekly 
work.''
    8. Page 82188. Remove the comma after ``benefits'' and before 
``These'' in the thirteenth line of the first full paragraph in the 
third column and add in its place a period.
    9. Page 82189. Remove the period in ``Section V.'' in line five of 
the paragraph that begins after Table 8 in the second column.
    10. Page 82192. Remove ``numbers'' and add in its place ``number'' 
in the eighth line of the third column.
    11. Page 82193. Revise the heading of Table 13 to read: ``Table 
13--First-Year Costs to Affected Firms per Power Unit for Option 3.''
    12. Page 82193. Revise the last sentence of footnote 63 to read, 
``When the Agency has looked at the impact on private carriers in 
relation to their revenue in the past, the percentage impact of costs 
to private carriers as a share of revenue has generally been an order 
of magnitude smaller than the impacts on for-hire trucking firms.''
    13. Page 82195. Remove the abbreviation ``EA'' in the third line 
from the bottom of the third column and add in its place 
``Environmental Assessment.''
    14. Page 82197. Correct:
    a. Sec.  395.1 by revising paragraph (b)(1).
    b. Sec.  395.1(d)(2) by removing the period after ``Sec. Sec.  
395.8'' in the second sentence and adding in its place a comma.
    c. Sec.  395.1(g) by revising paragraphs (g)(1)(i)(A)(4), 
(g)(1)(i)(B), and (g)(1)(i)(C).


Sec.  395.1  Scope of rules in this part.

* * * * *
    (b) Driving conditions--
    (1) Adverse driving conditions. Except as provided in paragraph 
(h)(2) of this section, a driver who encounters adverse driving 
conditions, as defined in Sec.  395.2, and cannot, because of those 
conditions, safely complete the run within the maximum driving time 
permitted by Sec. Sec.  395.3(a) or 395.5(a) may drive and be permitted 
or required to drive a commercial motor vehicle for not more than 2 
additional hours to complete that run or to reach a place offering 
safety for the occupants of the commercial motor vehicle and security 
for the commercial motor vehicle and its cargo. However, that driver 
may not drive or be permitted to drive--
    (i) For more than 12 hours in the aggregate following 10 
consecutive hours off duty for drivers of property-carrying commercial 
motor vehicles;
    (ii) After the end of the 14th or 16th hour since coming on duty 
following 10 consecutive hours off duty for drivers of property-
carrying commercial motor vehicles, pursuant to Sec.  395.3(a)(2);
    (iii) For more than 12 hours in the aggregate following 8 
consecutive hours off duty for drivers of passenger-carrying commercial 
motor vehicles; or
    (iv) After he/she has been on duty 15 hours following 8 consecutive 
hours off duty for drivers of passenger-carrying commercial motor 
vehicles.
* * * * *
    (g) * * *
    (1) * * *
    (i) * * *
    (A) * * *
    (4) The equivalent of at least 10 consecutive hours off duty if the 
driver does not comply with paragraph (g)(1)(i)(A)(1), (2), or (3) of 
this section;
    (B) May not drive more than 10/11 hours following one of the 10-
hour off-duty periods specified in paragraph (g)(1)(i)(A)(1) through 
(4) of this section; however, driving is permitted only if 7 hours or 
less have passed since the driver's last off-duty or sleeper-berth 
period of at least 30 minutes; and
    (C) May not be on duty for more than the 13-hour period in Sec.  
395.3(a)(4) or drive beyond the 14- or 16-hour driving window in Sec.  
395.3(a)(2) after coming on duty following one of the 10-hour off-duty 
periods specified in paragraph (g)(1)(i)(A)(1) through (4) of this 
section; and
* * * * *

    Issued on: February 9, 2011.
Anne S. Ferro,
Administrator.
[FR Doc. 2011-3267 Filed 2-15-11; 8:45 am]
BILLING CODE 4910-EX-P


