Final answer:
A solid double yellow centerline is used when there are two or more lanes of traffic moving in opposite directions to separate the opposing lanes and indicate that vehicles are not allowed to cross over into the opposite lane, except in special circumstances such as passing.
Step-by-step explanation:
When there are two or more lanes of traffic moving in opposite directions, a solid double yellow centerline is typically used.
This type of centerline is used to separate the opposing lanes of traffic and indicate that vehicles are not allowed to cross over into the opposite lane, except in special circumstances such as passing.
The solid double yellow centerline is an internationally recognized road marking and is commonly used in various countries.