Final answer:
A double solid yellow line down the middle of the roadway signifies that passing is not allowed in either direction. It is used to mark the centerline of a road where there are two-way traffic and passing is prohibited.
Step-by-step explanation:
A double solid yellow line down the middle of the roadway signifies that passing is not allowed in either direction. It is used to mark the centerline of a road where there are two-way traffic and passing is prohibited.
This type of line is commonly seen on narrow roads or roads with limited visibility, where passing could pose a safety hazard. It helps maintain traffic flow and reduces the risk of head-on collisions.
Drivers must obey the double solid yellow line and should not attempt to pass other vehicles unless there are other markings or signs allowing passing.