MEDFORD, Ore. (Nov 7, 2025) – At Medford Alert News, we get a steady stream of traffic-related questions from our readers — and lately, one inquiry keeps coming up more than any other: Roundabout signalization.
Thankfully, Oregon has a clear answer in the form of ORS 811.400, which covers the failure to use an appropriate signal for a turn, lane change, stop, or exit from a roundabout.
It might seem like a minor detail, but under Oregon law, failing to signal properly in these situations is a Class B traffic violation. That means drivers who don’t use their signal lamps (or proper hand signals where allowed) when turning, changing lanes, stopping, or exiting a roundabout can face a fine and citation.
The rule is simple in intent — it’s about communication. Whether you’re exiting a roundabout, changing lanes on I-5, or turning onto your neighborhood street, the law requires you to let others know what you’re doing. This includes signaling before exiting any position within a roundabout. Signaling is not required when initially entering a roundabout, as they are designed for single-direction traffic.
It’s worth noting that ORS 811.400 works hand-in-hand with ORS 811.395 and 811.405, which outline how signals must be used and when lights are mandatory instead of hand gestures. In short: if your vehicle is equipped with signal lights, you must use them.
Roundabouts are designed to reduce collisions and improve traffic flow — but they only work when drivers communicate. So the next time you use one, remember: signaling isn’t optional, it’s Oregon law.
— Medford Alert News Team
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