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

Question 1

What is the minimum required merging taper length (L) for closing a 12-foot wide traffic lane on a California highway with a posted speed limit of 55 mph?

660 feet, calculated using L = W × S for speeds of 45 mph or greater. 302 feet, calculated using L = W × S² / 60 for low-speed urban streets. 440 feet, calculated using L = 0.67 × W × S for shifting tapers only. 220 feet, calculated using L = 0.33 × W × S for shoulder tapers only.

Correct Answer:

660 feet, calculated using L = W × S for speeds of 45 mph or greater.

Question 2

A traffic control contractor is designing a merging taper to close a 12-foot lane on an urban street posted at 35 mph. What is the minimum taper length required?

420 feet, calculated using L = W × S for high-speed highway merging tapers. 245 feet, calculated using L = W × S² / 60 for speeds of 40 mph or less. 123 feet, calculated using L = W × S² / 120 for shifting tapers on streets. 82 feet, calculated using L = W × S² / 180 for shoulder tapers on streets.

Correct Answer:

245 feet, calculated using L = W × S² / 60 for speeds of 40 mph or less.

Question 3

A contractor must install a shifting taper to align traffic across a 12-foot lateral shift on a highway posted at 60 mph. What is the minimum required shifting taper length?

720 feet, which represents the full merging taper length for a 60 mph zone. 540 feet, which represents three-quarters of the full merging taper length. 360 feet, which equals L / 2 (half of the full merging taper length). 240 feet, which equals L / 3 (one-third of the full merging taper length).

Correct Answer:

360 feet, which equals L / 2 (half of the full merging taper length).

Question 4

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).

Question 5

What is the standard taper length range specified in CA MUTCD for one-lane, two-way traffic control using flaggers or temporary signals?

50 feet to 100 feet maximum, using 5 to 6 channelizing devices. 150 feet to 300 feet maximum, using 10 to 12 channelizing devices. 300 feet to 500 feet maximum, using 15 to 20 channelizing devices. 500 feet to 1000 feet maximum, using 25 to 30 channelizing devices.

Correct Answer:

50 feet to 100 feet maximum, using 5 to 6 channelizing devices.

Exam overview

About this Exam

Prepare with the C-31 Traffic Control Practice Questions - California CSLB C-31 Construction Zone Traffic Control Examination Exam practice quiz. This question bank includes 100 questions covering traffic, lane, zone, closure, and minimum. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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

This practice set contains 100 questions from the matching question bank and focuses on traffic, lane, zone, closure, and minimum. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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

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