Final answer:
A green traffic sign is a guide sign that provides information on direction and guidance for drivers.
Step-by-step explanation:
A green traffic sign typically marks a type of sign that provides information on direction and guidance, known as a guide sign. These signs inform drivers about upcoming exits, distances to destinations, and directions to cities or attractions. They differ from regulatory signs, which have rules that must be obeyed (like stop and yield signs), and warning signs, which alert drivers to potential hazards or changes in the road conditions. Moreover, green signs are distinctly different from school zone signs, which are normally yellow or yellow-green and indicate the presence of nearby schools and related activities.