How long does it take a typical tractor-trailer to clear a single railroad track? A double track?
a) It takes 7 seconds to clear a single track and more than 10 seconds to clear a double track
b) It takes 10 seconds to clear a single track and more than 12 seconds to clear a double track
c) It takes 14 seconds to clear a single track and more than 15 seconds to clear a double track
Answer: c) It takes 14 seconds to clear a single track and more than 15 seconds to clear a double track
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