Illinois Driving Permit Practice Test

What does a solid yellow line indicate on the road?

1. Passing is allowed

2. Multiple lanes of traffic

3. No passing allowed on that side of the road

4. Reserved lane for bicycles

The correct answer is: No passing allowed on that side of the road

A solid yellow line on the road serves an important purpose in traffic regulation. It indicates that no passing is allowed on that side of the road. This means that if you are driving in a lane where there is a solid yellow line, you should refrain from crossing over it to overtake another vehicle. The presence of a solid yellow line typically suggests that the road conditions may be unsafe for passing, such as on hills, curves, or in areas where visibility is limited. The other options do not accurately describe the function of a solid yellow line. While a dashed yellow line would indicate that passing is allowed, a solid line restricts this action. It is also important to recognize that multiple lanes of traffic can exist regardless of the line markings, and reserved lanes for bicycles are typically marked with specific signs or symbols, not solid yellow lines.