Current through Register Vol. 28, No. 3, September 1, 2024
01 A
shared signal face shall not be used for protected only mode right turns unless
the CIRCULAR GREEN and right-turn GREEN ARROW signal indications always begin
and terminate together. If a shared signal face is provided for a protected
only right turn, it shall meet the following requirements (see Figure 4D-16):
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A. It
shall be capable of displaying the following signal indications: steady
CIRCULAR RED, steady CIRCULAR YELLOW, CIRCULAR GREEN, and right-turn GREEN
ARROW. Only one of the three colors shall be displayed at any given
time.
B. During the protected
right-turn movement, the shared signal face shall simultaneously display both a
CIRCULAR GREEN signal indication and a right-turn GREEN ARROW signal
indication.
C. The shared signal
face shall always simultaneously display the same color of circular indication
that the adjacent through signal face or faces display.
D. If the protected only mode is not the only
right-turn mode used for the approach, the signal face shall be the same shared
signal face that is used for the protected/permissive mode (see Section 4D.24
).
Option:
02 A straight-through GREEN ARROW signal
indication may be used instead of the CIRCULAR GREEN signal indication in Items
A and B in Paragraph 1 on an approach where left turns are prohibited and a
straight-through GREEN ARROW signal indication is also used instead of a
CIRCULAR GREEN signal indication in the other signal face(s) for through
traffic.
Standard:
03 (DE Revision) If a separate right-turn
signal face is provided for a protected only mode right turn, it shall meet the
following requirements (see Figure 4D-17):
A.
It shall be capable of displaying one of the following sets of signal
indications:
1. Steady right-turn RED ARROW,
steady right-turn YELLOW ARROW, and right-turn GREEN ARROW. Only one of the
three indications shall be displayed at any given time.
A signal instruction sign shall not be required with
this set of signal indications. If used, it shall be a RIGHT ON GREEN ARROW
ONLY (R10-5a) sign (see Figure 2B-27).
2. Steady CIRCULAR RED, steady right-turn
YELLOW ARROW, and right-turn GREEN ARROW. Only one of three indications shall
be displayed at any given time. If the CIRCULAR RED signal indication is
sometimes displayed when the signal faces for the adjacent through lane(s) are
not displaying a CIRCULAR RED signal indication, a RIGHT TURN SIGNAL (R10-10R)
sign (see Figure 2B-27) shall be used unless the CIRCULAR RED signal indication
is shielded, hooded, louvered, positioned, or designed such that it is not
readily visible to drivers in the through lane(s).
B. During the protected right-turn movement,
a right-turn GREEN ARROW signal indication shall be displayed.
C. A steady right-turn YELLOW ARROW signal
indication shall be displayed following the right-turn GREEN ARROW signal
indication.
D. When the separate
signal face is providing a message to stop and remain stopped, a steady
right-turn RED ARROW signal indication shall be displayed if it is intended
that right turns on red not be permitted (except when a traffic control device
is in place permitting a turn on a steady RED ARROW signal indication) or a
steady CIRCULAR RED signal indication shall be displayed if it is intended that
right turns on red be permitted. Pursuant to Delaware Code, Title 21, Chapter
41, Subchapter II, §4108, right turns are not permitted on a steady RED
ARROW signal indication. Therefore, traffic control devices permitting turns on
a steady RED ARROW shall not be used.
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E. If the protected only mode is not the only
right-turn mode used for the approach, the signal face shall be the same
separate right-turn signal face that is used for the protected/permissive mode
(see Section 4D.24 and Figure 4D-19) except that a flashing right-turn YELLOW
ARROW or flashing right-turn RED ARROW signal indication shall not be displayed
when operating in the protected only mode.
Support:
04 (DE Revision) DelDOT's "Traffic Design
Manual" contains further information regarding signal indications for protected
only mode right-turn movements.
