Reversible lanes — Iowa Permit Test

Reversible lanes carry traffic one way at some times and the other way at other times, and are usually marked by double-dashed yellow lines.

The same lane may be yours in the morning and the other side's at night. The lines warn you to check first.

These lanes are usually marked by double-dashed yellow lines.

Over a reversible lane, a green arrow means you can use the lane beneath it.

The lights tell you which way the lane runs right now. Using it the wrong way puts you head on with traffic.

A green arrow means you can use the lane beneath it;

Over a reversible lane, a red X means you may not use that lane.

A red X means traffic in that lane is coming toward you, so you must stay out of it.

a red “X” means you may not.

A flashing yellow X over a reversible lane means the lane is only for turning.

Cars from both ways may use that lane to turn. Driving straight in it can lead to a head-on crash.

A flashing yellow “X” means the lane is only for turning.

A steady yellow X over a reversible lane means its use is changing, and you should move out of it as soon as it is safe.

Soon cars will be allowed to come the other way in that lane. Get out before they do.

A steady yellow “X” means that the use of the lane is changing and you should move out of it as soon as it is safe to do so.

What lines usually mark a reversible lane?

Double-dashed yellow lines. The same lane may be yours in the morning and the other side's at night. The lines warn you to check first. Iowa Driver's License Manual, p.15: “These lanes are usually marked by double-dashed yellow lines.”