What does the number on this milepost tell a driver?
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A.
Miles along the route from where it entered the state. Correct
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B.
The route number assigned to this highway.
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C.
How many miles are left until the state line.
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D.
The distance to the next numbered exit.
The answer is "Miles along the route from where it entered the state."
Green milepost panels count up from the point where the route enters the state, giving a running mile count along the route rather than a distance to anywhere ahead. Depending on direction of travel the numbers may rise or fall, but they are not a countdown to the next border or exit. The "miles left until the state line" answer is the trap for drivers used to watching a GPS clock down to a destination. They expect the milepost to work the same way and read the panel as miles remaining rather than miles counted since entering.
The traps in the wrong answers
B. The route number assigned to this highway.
The route number lives on the shield-shaped route marker; the milepost's number is a position on the road, not the road's identity. This answer reads any roadside number as labeling the road itself, so a shoulder panel gets treated like a small route shield.
C. How many miles are left until the state line.
Mileposts count up from the entry point, so the number rises as a driver continues along the route rather than falling toward the far border. This answer assumes the count runs toward wherever the route ends, the way a driver mentally tracks time remaining on a trip.
D. The distance to the next numbered exit.
Distance to the next exit is posted on separate exit-distance guide signs at interchange approaches, not on the small green milepost panels set at one-mile intervals along the shoulder. This answer grabs onto the 'next exit' habit, the number a highway driver checks most often, and pins it on any small shoulder panel with a number on it.
This question tests your knowledge of Guide Signs on the roads of every US state . Source: Manual on Uniform Traffic Control Devices, sign D10-1 (Reference Location Sign (Milepost))..
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