What does a double solid line indicate?

Answer: B — No passing

A double solid line indicates that there is no passing allowed. This marking is used to prevent vehicles from crossing it to overtake another vehicle, ensuring safety in areas where visibility is limited or where a higher risk of accidents exists. This regulation helps manage the flow of traffic and reduce the chances of collisions, particularly on roads with lane restrictions, sharp curves, or other hazardous conditions. Opposing this, options that suggest limited passing or allowing passing with caution do not apply here, as the presence of double solid lines specifically prohibits any form of passing. Yielding to oncoming traffic is also unrelated to the meaning of double solid lines, which focus solely on the rules concerning lane changes and overtaking other vehicles.