C-31 Traffic Control Practice Questions - California CSLB C-31 Construction Zone Traffic Control Examination Exam

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What is the minimum required shoulder taper length when closing a 10-foot wide paved shoulder on a roadway with a posted speed of 50 mph?

500 feet, which is the full merging taper length required for closing lanes. 333 feet, which is two-thirds of the full merging taper length for shifts. 250 feet, which is half of the full merging taper length for shifts. 167 feet, which equals L / 3 (one-third of the merging taper length).

Correct Answer:

167 feet, which equals L / 3 (one-third of the merging taper length).

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