Current through Register Vol. 28, No. 3, September 1, 2024
Standard:
01
If a shared signal face is provided for a protected/permissive mode right turn,
it shall meet the following requirements (see Figure 4D-18):
A. It shall be capable of displaying the
following signal indications: steady CIRCULAR RED, steady CIRCULAR YELLOW,
CIRCULAR GREEN, steady right-turn YELLOW ARROW, and right-turn GREEN ARROW.
Only one of the three circular indications shall be displayed at any given
time. Only one of the two arrow indications shall be displayed at any given
time. If the right-turn GREEN ARROW signal indication and the CIRCULAR GREEN
signal indication(s) for the
adjacent through movement are always terminated
together, the steady right-turn YELLOW ARROW signal indication shall not be
required.
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B. During the protected right-turn movement,
the shared signal face shall simultaneously display a right-turn GREEN ARROW
signal indication and a circular signal indication that is the same color as
the signal indication for the adjacent through lane on the same approach as the
protected right turn.
C. A steady
right-turn YELLOW ARROW signal indication shall be displayed following the
right-turn GREEN ARROW signal indication, unless the right-turn GREEN ARROW
signal indication and the CIRCULAR GREEN signal indication(s) for the adjacent
through movement are being terminated together. When the right-turn GREEN ARROW
and CIRCULAR GREEN signal indications are being terminated together, the
required display following the right-turn GREEN ARROW signal indication shall
be either the display of a CIRCULAR YELLOW signal indication alone or the
simultaneous display of the CIRCULAR YELLOW and right-turn YELLOW ARROW signal
indications.
D. During the
permissive right-turn movement, the shared signal face shall display only a
CIRCULAR GREEN signal indication.
E. A protected/permissive shared signal face,
regardless of where it is positioned and regardless of how many adjacent
through signal faces are provided, shall always simultaneously display the same
color of circular indication that the adjacent through signal face or faces
display.
02 If a separate
right-turn signal face is being operated in a protected/permissive right-turn
mode, a CIRCULAR GREEN signal indication shall not be used in that
face.
03 (DE Revision) If a
separate right-turn signal face is being operated in a protected/permissive
right-turn mode and a flashing right-turn yellow arrow signal indication is
provided, it shall meet the following requirements (see Figure 4D-19):
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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, flashing right-turn YELLOW ARROW, and right-turn GREEN
ARROW. Only one of the four indications shall be displayed at any given
time.
2. Steady CIRCULAR RED,
steady right-turn YELLOW ARROW, flashing right-turn YELLOW ARROW, and
right-turn GREEN ARROW. Only one of the four 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 in the separate
right-turn signal face 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. During the permissive right-turn movement,
a flashing right-turn YELLOW ARROW signal indication shall be
displayed.
E. A steady right-turn
YELLOW ARROW signal indication shall be displayed following the flashing
right-turn YELLOW ARROW signal indication if the permissive right-turn movement
is being terminated and the separate right-turn signal face will subsequently
display a steady red indication.
F.
When a permissive right-turn movement is changing to a protected right-turn
movement, a right-turn GREEN ARROW signal indication shall be displayed
immediately upon the termination of the flashing right-turn YELLOW ARROW signal
indication. A steady right-turn YELLOW ARROW signal indication shall not be
displayed between the display of the flashing right-turn YELLOW ARROW signal
indication and the display of the steady right-turn GREEN ARROW signal
indication.
G. When the separate
right-turn 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.
H. It shall be permitted to display a
flashing right-turn YELLOW ARROW signal indication for a permissive right-turn
movement while the signal faces for the adjacent through movement display
steady CIRCULAR RED signal indications.
I. A signal face containing a dual-arrow
signal section in place of separate flashing right-turn YELLOW ARROW and
right-turn GREEN ARROW signal sections shall be permitted where signal head
height limitations (or lateral positioning limitations for a
horizontally-mounted signal face) are a concern. The dual-arrow signal section,
where used, shall display a GREEN ARROW for the protected right-turn movement
and a flashing YELLOW ARROW for the permissive right-turn movement.
J. During steady mode (stop-and-go)
operation, the signal section that displays the steady right-turn YELLOW ARROW
signal indication during change intervals shall not be used to display the
flashing right-turn YELLOW ARROW signal indication for permissive right
turns.
K. During flashing mode
operation (see Section 4D.30), the display of a flashing right-turn YELLOW
ARROW signal indication shall be only from the signal section that displays a
steady right-turn YELLOW ARROW signal indication during steady mode
(stop-and-go) operation.
Option:
Standard:
04 When an engineering study determines that
each and every vehicle must successively come to a full stop before making a
permissive right turn, a separate signal face that has a flashing right-turn
RED ARROW signal indication during the permissive right-turn movement may be
used.
05 (DE Revision) If a
separate right-turn signal face is being operated in a protected/permissive
right-turn mode and a flashing right-turn RED arrow signal indication is
provided, it shall meet the following requirements (see Figure 4D-15):
A. It shall be capable of displaying one of
the following sets of signal indications:
1.
Steady or flashing 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.
2. Steady CIRCULAR
RED on the left and steady or flashing right-turn RED ARROW on the right of the
top position, steady right-turn YELLOW ARROW in the middle position, and
right-turn GREEN ARROW in the bottom position. Only one of the four 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
in the separate right-turn signal face 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. During the permissive right-turn movement,
the separate right-turn signal face shall display a flashing right-turn RED
ARROW signal indication.
E. A
steady right-turn YELLOW ARROW signal indication shall be displayed following
the flashing right-turn RED ARROW signal indication if the permissive
right-turn movement is being terminated and the separate right-turn signal face
will subsequently display a steady red indication.
F. When a permissive right-turn movement is
changing to a protected right-turn movement, a right-turn GREEN ARROW signal
indication shall be displayed immediately upon the termination of the flashing
right-turn RED ARROW signal indication. A steady right-turn YELLOW ARROW signal
indication shall not be displayed between the display of the flashing
right-turn RED ARROW signal indication and the display of the steady right-turn
GREEN ARROW signal indication.
G.
When the separate right-turn 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.
H. It shall be permitted to
display a flashing right-turn RED ARROW signal indication for a permissive
right-turn movement while the signal faces for the adjacent through movement
display steady CIRCULAR RED signal indications and the opposing left-turn
signal faces display left-turn GREEN ARROW signal indications for a protected
left-turn movement.
I. A
supplementary sign shall not be required. If used, it shall be a RIGHT TURN
YIELD ON FLASHING RED ARROW AFTER STOP (R10-27) sign (see Figure 2B-27).
Option:
06 The requirements of Item A.1 in Paragraph
5 may be met by a vertically-arranged signal face with a horizontal cluster of
two right-turn RED ARROW signal indications, the left-most of which displays a
steady indication and the right-most of which displays a flashing indication
(see Figure 4D-15).
Support:
07 (DE Revision) DelDOT's "Traffic Design
Manual" contains further information regarding signal indications for
protected/permissive mode right-turn movements.