According to the manual, what do the blue square or rectangular service signs on a highway show you?
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A.
Services located at the next exit Correct
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B.
Exit numbers for the next three exits ahead
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C.
Route numbers of highways crossing this one
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D.
The driving distance to the nearest large city
The answer is "Services located at the next exit"
Service signs are the blue signs marking motorist services. The manual says each sign shows the location of services (hospital, food, gas, lodging, and so on) available at the next exit. Choice B is the trap for drivers who latch onto the phrase "next exit" from the exit-number panels a page earlier and forget those panels are green, not blue.
The traps in the wrong answers
B. Exit numbers for the next three exits ahead
Exit-number information appears on the green highway guide signs shown earlier in the chapter, not on blue service signs. This answer pairs the phrase 'next exit' in the service-sign rule with the advance exit-number panels shown just before it and forgets those panels are green, not blue.
C. Route numbers of highways crossing this one
Crossing route numbers appear on the route-marker shields and keystones described on the same page, not on blue service signs. This answer groups every small numbered sign along the highway into one category and skips the color cue that separates route markers from motorist-service signs.
D. The driving distance to the nearest large city
Distances to cities appear on the green mileage guide signs, not on blue service signs. This answer assumes any wayfinding sign along the highway is blue and rolls city mileage in with hospital, food, gas, and lodging.
This question tests your knowledge of Guide Signs in Pennsylvania. Source: Pennsylvania Driver Manual, "Service Signs," p.21..
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