Which line marks the left edge of one-way roads and separates opposing lanes on two-way roads?

Which line marks the left edge of one-way roads and separates opposing lanes on two-way roads?

• A. Solid white lines
• B. Dashed yellow lines
• C. Dashed white lines
• D. Solid yellow lines

Answer: (D)

Solid yellow lines indicate the boundary between opposing traffic and, on one-way streets, mark the left edge of the roadway. On a two-way road, a solid yellow line runs down the center to show you’re not supposed to pass when that line is on your side. On a one-way street, that same solid yellow line serves as the left boundary of the travel lanes. Dashed yellow lines would allow passing when safe, while white lines are used for lane edges or for traffic moving in the same direction, and dashed white lines permit crossing.

Solid yellow lines indicate the boundary between opposing traffic and, on one-way streets, mark the left edge of the roadway. On a two-way road, a solid yellow line runs down the center to show you’re not supposed to pass when that line is on your side. On a one-way street, that same solid yellow line serves as the left boundary of the travel lanes. Dashed yellow lines would allow passing when safe, while white lines are used for lane edges or for traffic moving in the same direction, and dashed white lines permit crossing.