3.25
3
4
30
3
2
3
2
3
3.21
5.94
10.12
4.22
6.35
New
3.25
3
2
11.3
4.22
6.35
3.25
7.47
2.64
4
7.47
10.92
15.5
15.06
30
More Flexible
TR08.067 10.08
TR08.067
8.08
The new display provides traffic engineers
with more options to handle variable traffic volumes.
www.modot.org
For more information about
traffic signals contact:
1 888 ASK MODOT
Missouri Department of Transportation
888-ASK-MODOT (275-6636)
www.modot.org
3
7.62
18.28
7.15
2.4
7.47
2.5
2
4
2
7.93
3.21
12.12
10.12
3.76
5.94
10.12
15.56
6.35
11.3
24
7.25
14.76
2
2.64
7.25
15.5
7.62
4.92
5.94
4.22
9.8
7.25
7.25
2.4
ON
F LA S H I N G
ARROW
3.21
3.25
30
3
4
2
ON FLASHIN G
ARROW
2.4
18.28
15.06
4
YIELD
3.21
5.94
10.12
YIELD
1.5
30
3
2
3
2
7.93
24
30
3.76
15.56
3
2.5
12.12
10.12
6.35
2
7.15
5.94
7.25
3
4.92
7.47
2.64
7.25
7.62
2
2.4
10.92
15.5
15.5
14.76
3
4
7.62
L E FT T U R N
3
9.8
7.25
7.25
L E FT T U R N
SIGNAL
3
3.21
4.22
2.64
2
4
1.5
36
4
2
4
ON FLASHING
ARROW
You have more opportunities to make a
left turn with the flashing yellow left-turn
arrow than with the traditional yielding
left-turn indication, which keeps you
moving.
ON
F LA S H I N G
ARROW
1.5
YIELD
2
4
2
YIELD
4
L E FT T U R N
0.5
Less Delay
3
L E FT T U R N
SIGNAL
3
Traditional
2
A national study demonstrated drivers
had fewer crashes with the flashing yellow
left-turn arrow than with the traditional
yielding left-turn indication.
4
Safer
Signal Display Changes
3.25
A Better Left-Turn Signal
0.5
7.93
24
1.5
11.3
36
3.76
15.56
2.4
4
2.5
12.12
10.12
6.35
7.25
7.47
30
2
2.64
7.25
7.62
18.28
15.06
4
2
2
10.92
15.5
15.5
14.76
4.92
3
36
4
2
4
2
4
3.25
7.15
5.94
4
4
7.62
7.47
2
0.5
1.5
4
YIELD
ON
F LA S H I N G
ARROW
3.21
4.22
9.8
7.25
7.25
2
2
4
L E FT T U R N
1.5
YIELD
2.4
Flashing
Yellow
Arrows
3
L E FT T U R N
SIGNAL
ON FLASHING
ARROW
2.64
What to
know about
4.22
6.35
The Missouri Department of Transportation is implementing
a new traffic signal display to provide a safer, more efficient
left turn for motorists. The flashing yellow arrow left-turn
indication is a new type of display that can replace the
circular green indication for left turns at selected signalized
intersections.
Flashing
YellowArrow
Flashing Yellow Arrow = Circular
Green for Left Turn: Both mean
YIELD
The new flashing yellow arrow indication
provides a more direct message than the
circular green for left turns – yield to opposing traffic and pedestrians when you see it
displayed. It reduces confusion since the left
turn display is no longer the same indication as the adjacent through lanes. Like the
circular green, there will be a sign adjacent
to the left turn signal display explaining the
meaning.
A National Study Confirms It’s A
Better Left-Turn-Signal
Several states, including Missouri, are currently using this type of signal. We expect
the new signals to become the preferred
signal display for left turns. A national study
conducted for the Federal Highway Administration demonstrated the new indication
helps to prevent crashes, move more traffic
through intersections, and provide additional
traffic management flexibility for road
agencies.
Steady Circular Red
It requires you to stop and wait
during this interval.
Steady Yellow Arrow
It warns you that the left-turn
signal is about to change to red
and that you should prepare to
stop – or prepare to complete your left turn
if you are legally within the intersection and
there is no conflicting traffic present.
Flashing Yellow Arrow
It allows you to turn left when oncoming traffic is clear [oncoming traffic has a green light].
You must carefully determine that there is an
adequate gap in the oncoming traffic, and
ensure that there are no pedestrian conflicts,
before making your turn.
Steady Green Arrow
It allows you to turn left.
How does a flashing yellow
arrow work?
A flashing yellow arrow means left turns
are allowed, but you must first yield to
oncoming traffic and pedestrians and then
proceed with caution.
Drivers must always
remember: a flashing yellow
arrow = turn with caution.
What should motorists do
when approaching the flashing yellow left-turn signal?
Drivers should stop at the intersection,
and yield to oncoming traffic. When it
is safe, make your left turn and proceed
through the intersection. After it flashes,
the flashing yellow left-turn arrow then
becomes the steady (non-flashing) yellow
left-turn arrow. Drivers should treat the
steady yellow arrow just like a standard
yellow light. Prepare to stop before the
red light appears.
Will the flashing yellow arrow
be on all day?
An advantage of the flashing yellow left
turn display is that it gives traffic engineers the flexibility to use specific indications during different times of the day.
This means the flashing yellow arrow or
steady green arrow may not be seen every
time you approach the intersection. This
will reduce your wait times at a signal
using this display.