TRAFFIC SIGNALS - SOLVING A LEFT TURN PROBLEM

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YELLOW TRAP

DOGHOUSE LEAD-LAG SIGNAL (YELLOW TRAP)

doghouse leadlag signal

Permissive left stopped at wrong time by circular green.

FLASHING YELLOW ARROW LEAD-LAG SIGNAL

fya leadlag signal

Permissive left stopped at correct time by flashing yellow arrow.

PREVENTS YELLOW TRAP