The Green Guide Sign, the Exit, and the Lane You're In
You are driving an unfamiliar highway toward a city at 65 mph in the right lane of three. A large green guide sign overhead reads: left two lanes "Anchorage - Keep Left," right lane "Exit 12 - Eagle River NEXT RIGHT." You want Eagle River. A smaller white rectangular sign below reads "EXIT ONLY" with a downward arrow over your lane. Traffic in the middle lane is dense and moving faster than you. Your exit is about a quarter mile ahead, and a car is close behind you.
1. What do the green sign and the white "EXIT ONLY" plaque tell you to do, and how does your current lane position factor in?
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The green guide sign is navigational: it tells you which lanes serve which destination. "Anchorage - Keep Left" means the left two lanes continue to Anchorage; "Exit 12 - Eagle River NEXT RIGHT" means your destination is the upcoming right exit. The white plaque with a down arrow and "EXIT ONLY" is a regulatory lane-use marking: your right lane must exit - it will not continue straight.
So your lane is committed to Eagle River, which is what you want. The practical point: you do not need to change lanes; changing left into the faster middle lane would actually take you away from your exit. Stay in the right lane, match the exit's geometry, and follow the guide sign's direction rather than the faster traffic beside you.
2. The car behind is close and the middle lane is fast. What is the safe plan for the next quarter mile, and why is speeding up to "clear" the exit a poor choice?
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Plan: maintain a steady, legal speed for the exit, signal early, and let the tailgater deal with their own following distance - do not let them push you into the fast middle lane or into an unsafe exit speed. Exit ramps often have lower advisory speeds, so begin slowing after you are clearly in the exit lane, not while still at highway speed in a through lane.
Speeding up to "get clear" is poor because: (1) it raises your entry speed into a ramp whose safe speed you haven't seen yet; (2) it reduces your reaction time to the tailgater and to ramp geometry; (3) the "EXIT ONLY" lane is already yours - there's nothing to race. The reasoning: the guide sign tells you where, the lane marking tells you you're committed, and the tailgater is a following-distance problem you solve by being predictable, not fast.