You see numbered mileposts along a Texas interstate highway. According to the manual, what purpose do they serve?
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A.
Counting down miles to the next city
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B.
Locating crashes, breakdowns, and other emergencies Correct
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C.
Showing where speed limits change
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D.
Marking each rest area on the route
The answer is "Locating crashes, breakdowns, and other emergencies"
Mileposts on interstate highways provide a means of identifying the location of crashes, breakdowns, and other emergencies by mile number. Option A is the trap: green destination signs are what count down miles to the next city, and a driver who has learned to look for that number reads the same purpose onto every numbered marker.
The traps in the wrong answers
A. Counting down miles to the next city
Green destination signs, not mileposts, count the distance to the next city or exit. Rolls two different signs together because both carry numbers next to a city or highway name.
C. Showing where speed limits change
Speed-limit changes are announced by white regulatory signs, not by shoulder mileposts. Reads any numbered roadside sign as a speed change because that is the number a driver looks for first.
D. Marking each rest area on the route
Rest and picnic areas are marked by their own guide signs, while mileposts identify locations for crashes, breakdowns, and other emergencies. Trades the emergency-location purpose for the roadside amenity a driver actually watches for on a long trip.
This question tests your knowledge of Guide Signs in Texas. Source: Texas Driver Manual, "Guide Signs," p.32..
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