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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