Exit 199, OR 99E, and a Brown Scenic Byway Sign
You are northbound on Interstate 5 in Oregon at milepost 197, approaching an interchange. A green guide sign reads 'Exit 199 - OR 99E / City Center' with a right-pointing arrow over the right lane. A smaller white sign below says 'EXIT ONLY' for the right lane. Another green sign reads 'Exit 201 - Next Right' and a blue services sign shows gas, food, and lodging at Exit 201. A brown sign shows a covered bridge and 'SCENIC BYWAY.' Your navigation app says to take Exit 199, but traffic is heavy and a semi truck is in the right lane beside you. The right lane is moving slower. You are in the center lane with a solid white line separating you from the exit lane, which becomes dashed 500 feet before the gore. The speed limit is 65 mph. Rain is falling.
1. How do exit numbers relate to mileposts in Oregon, and what does Exit 199 tell you about your position?
Read the worked answer
Oregon exit numbers are generally tied to mileposts along the route: Exit 199 is near milepost 199, so from milepost 197 it is about two miles ahead. That does not mean it is the second exit or that every exit number appears; numbers can skip as mileposts change. Use the milepost relationship to plan: you have roughly two miles, not two hundred feet, to get into the correct lane. The green guide sign with the right arrow over the right lane and the white EXIT ONLY plaque tell you the right lane is committed to Exit 199. If you stay in the center lane past the solid white line, you may lose the legal and physical space to exit. The rain and heavy traffic mean you should make the lane decision early, at the dashed section, rather than at the gore.
2. Given the semi beside you and the solid white line, how should you position for Exit 199?
Read the worked answer
Plan to enter the exit lane where the line becomes dashed, not across the solid white line. Signal, check the mirror and blind spot, and judge the semi's position: if the truck is alongside, do not squeeze between it and the gore; either slow to drop behind it or accelerate only if you can clearly complete the lane change ahead of it without cutting it off. The EXIT ONLY sign means once you are in that lane you must exit, so do not enter it as a passing lane. In rain, increase your following distance and avoid abrupt braking on the wet pavement. If traffic prevents a safe change, accept the miss: continue to the next exit and reroute. Do not stop, back up, or cross the gore. A missed exit is a delay; a forced exit-lane change beside a semi is a crash risk.
3. What do the blue and brown signs indicate, and should either change your route?
Read the worked answer
The blue services sign is informational: it tells you gas, food, and lodging are available at Exit 201, the next right. The brown sign is also informational and marks a scenic byway or recreation feature, not a legal route marker or a mandatory detour. Neither sign changes your obligation to follow the green guide sign for your destination. The OR 99E marker on the green sign identifies the state route you would reach via Exit 199; it is not the same as the brown scenic-byway sign. If you need fuel, you could choose Exit 201, but that is a service decision, not a traffic-control instruction. If you are committed to Exit 199, ignore the services sign for now and focus on the lane change. Do not confuse a brown recreational sign with a warning sign or with a route marker; color and shape tell you it is guidance, not regulation.