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NOTE: Please wait for these animated GIF files to finish downloading for
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PPLT Displays Preferred by the NCHRP
3-54 Panel 10/99
Horizontal Flashing Yellow Arrow Display (Leading
Protected Left-turn Arrow)
Horizontal Flashing Yellow Arrow Display (Lagging
Protected Left-turn Arrow)
Vertical Flashing Yellow Arrow Display (Leading
Protected Left-turn Arrow)
Vertical Flashing Yellow Arrow Display (Lagging
Protected Left-turn Arrow)
Vertical Flashing Yellow Arrow Display (Leading With
Dual-Mode Lens)
Vertical Flashing Yellow Arrow Display (Lagging With
Dual-Mode Lens)
Unique Flashing Left-turn Displays
Currently in Use
Flashing Yellow Arrow Used in Nevada (lead operation)
Flashing Yellow Arrow Used in Nevada (lag operation)
Flashing Red Arrow Used in Cupertino, CA
Flashing Yellow Used in Washington State
Flashing Yellow Ball Used in Seattle, Washington
Flashing Red Ball Used in Michigan
PPLT "Dallas Phasing"
(Horizontal Head Placement)
Leading Left-turn Indications Compared with the
"Yellow Trap"
Lagging Left-turn Indications Showing Dallas vs.
Arlington Phasing
Dual Lead Left-turn Indications Compared With the
"Yellow Trap" Display
PPLT "Dallas Phasing"
(Doghouse Configuration)
Lead Left-turn Indication During Lead/Lag Operation
Lag Left-turn Indication During Lead/Lag Operation
Lead Left-turn Indication During Lead/Lead Operation
PPLT "Modified Dallas Phasing
Using Flashing Yellow Arrows for Permitted Indications"
Replacing the Green Ball in a
Dallas Display With Flashing Yellow Arrow(Leading Left-turns)
The "Ideal" Dallas Display Closest to the
Reno, Nevada Display (Leading Left-Turns)
The "Ideal" Dallas Display Closest to the
Reno, Nevada Display (Lagging Left Turns)
MUTCD Left-turn Displays
Left-turn Signal Head Arrangements Provided in the 1988 MUTCD
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