Final answer:
Green is used as the background color for guide signs, mileposts, and street name signs. It is also used as a legend color on permissive regulation and parking signs. Green is associated with safety and symbolizes new beginnings, freshness, and hope.
Step-by-step explanation:
In the context of road signs, green is used as the background color for guide signs, mileposts, and street name signs. It is also used as a legend color on permissive regulation and parking signs.
Green is chosen for these purposes because it is easily visible in all light conditions and is associated with safety. Additionally, green is often used to symbolize new beginnings, freshness, and hope.