What is the default speed limit on Illinois interstates and tollways when no other limit is posted?
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A.
75 mph
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B.
70 mph Correct
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C.
55 mph
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D.
65 mph
The answer is "70 mph"
Illinois defaults to 70 mph on interstates and tollways when no different limit is posted. D is the trap: 65 mph is the four-lane highway figure printed one line above interstates in the same list, and drivers who scan the list quickly grab the wrong row.
The traps in the wrong answers
A. 75 mph
75 mph is higher than any default in the Illinois list. This answer assumes any interstate can be driven faster than the manual actually prints.
C. 55 mph
55 mph is the manual's default for other highways and rural areas, not for interstates. This answer applies the rural-road default to the interstate row instead of reading the row above it.
D. 65 mph
65 mph is the four-lane highway figure listed one line above the interstate row. This answer grabs the neighboring value in the list rather than the one keyed to interstates.
This question tests your knowledge of Speed Limits in Illinois. Source: Illinois Rules of the Road, "Speed Limits," p.24..
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