Federal Register / Vol. 67, No. 98 / Tuesday, May 21, 2002 / Proposed Rules
Room 4230, (202) 366每0791, U.S. Department of Transportation,Federal
Highway Administration, 400 Seventh Street, SW., Washington, DC 20590.
Office hours are from 7:45 a.m. to 4:15 p.m., e.t., Monday through
Friday, except Federal holidays.
In Section 1A.12 Color Code, the FHWA proposes adding to the STANDARD
statement the assignment of the color fluorescentcoral to incident
management to make it easier for road users to follow directions
relating to traffic incidents. The items will be reordered so that the
colors appearin alphabetical order. The color coordinates for the
color coral are indicated below. The Commission Internationale de
l＊Eclairage (CIE) (English: International Commission on Illumination)
chromaticity coordinates (x, y), defining the corner of the
Fluorescent Coral daytime color region are as follows:
X 0.450 0.590 0.644 0.536
y 0.270 0.350 0.290 0.230
Luminance Factor Limits (Y) D65 Min Fluorescent Pink
Fluorescent materials differ from nonfluorescent materials in that the
total luminance is the sum of the luminances due to reflection and
fluorescence. The luminance factor Y of such materials is the sum of
the luminance due to reflection (YR) and the luminance due to
fluorescence (YF). Therefore, Y=YR+YF. If the value YF is greater than
zero, the material is fluorescent; if YF equals zero, then the
luminance factor Y is equal to YR. These four pairs of chromaticity
coordinates determine the acceptable color in terms of CIE 1931
Standard Colorimetric System (2 degree standard observer) measured
with CIE Standard
Illuminant D65 in accordance with ASTM E991. In addition, the color
shall be fluorescent, as determinedby ASTM E1247. 8. In Section 1A.13
Definitions of Words and Phrases in This Manual, the FHWA proposes in
the STANDARD statement revising definitions for:＆＆Active Grade
Crossing Warning System,＊＊ ＆＆Average Day,＊＊＆＆Beacon,＊＊ ＆＆Crosswalk,＊＊
and ＆＆Highway Traffic Signal＊＊ tobetter reflect accepted practice and
terminologies. Additionally, theFHWA proposes adding definitions for
＆＆Crashworthy,＊＊＆＆Detectable,＊＊ ＆＆Inherently LowEmission Vehicle
(ILEV),＊＊＆＆Pedestrian Facilities,＊＊
and ＆＆Roundabout Intersection＊＊ since they are used in the MUTCD.
Additionally, the FHWA proposes removing the definition
for＆＆Preferential Lane Marking＊＊ since it is no longer used in the
MUTCD. 9. In Section 1A.14 Abbreviations Used on Traffic Control
Devices, the FHWA proposes in the first STANDARD statement revising
the text to clarify that the abbreviations shown in Table 1A每1 are not
the only word messages that can be abbreviated. The FHWA also proposes
adding a GUIDANCE statement at the end of this section to give
guidance regarding the consistency of abbreviations within a single
jurisdiction.
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Federal Register / Vol. 67, No. 98
In Section 2B.23, the FHWA proposes changing the title from
＆＆Reversible Lane Control Signs (R3每9c through R3每9i)＊＊ to
＆＆Reversible Lane Control Signs (R3每9d, R3每9f through R3每9i)＊＊ and
removing the R3每9c and R3每9e signs and allof their references in the
section. Using just the R3每9d sign will improve uniformity and
maintain consistency with the red X symbol used in reversible lane
signal systems. The DO NOT ENTER symbol is intended to be used to
prohibit entry into a roadway or ramp, and using this symbol to
prohibit use of a single lane of a roadway that is otherwise available
for travel is inconsistent and degrades the meaning of the symbol. The
FHWA proposes clarifying in the first STANDARD statement that the
barriers mentioned are physical barriers. Additionally, the FHWA
proposes modifying item B of the second OPTION statement to read, ＆＆An
engineering study indicates that the use of the Reversible Lane
Control signs alone would result in an acceptable level of safety and
efficiency.＊＊ This is proposed to clarify the specific types of signs
used for control of a reversible laneoperation that the study needs to
evaluate to determine whether suchsigns alone, without reversible
lanesignals, would be acceptable. The FHWA proposes that these changes
in Section 2B.23 become effective immediately for new or replacement
of damaged existing sign installations. The FHWA proposes a phase-in
compliance period of 10 years for existing signs in good condition to
minimize any impact on State or local highway agencies. 36. In Section
2B.28 Keep Right and Keep Left Signs (R4每7, R4每8), the FHWA proposes
adding to the first OPTION statement that the Keep Left (R4每8) sign
may be used at locations where it is necessary for traffic to pass
only to the left of a roadway feature or obstruction. TheFHWA proposes
adding to the GUIDANCE statement to clarify that the Keep Right sign
should be mounted on the face of.
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