MOT Work Zone Planning & Design Principles 3

Question 1

In work zone design, what does the abbreviation 'TTC' stand for?

Accepted Answer

Temporary Traffic Control

Answer

TTC stands for Temporary Traffic Control, which encompasses all measures taken to guide road users safely through or around a work zone.

Question 2

Which type of work zone taper is used to merge traffic from a closed lane into an open lane?

Accepted Answer

Merging taper

Answer

A merging taper directs traffic from a closed lane into an adjacent open lane using channelizing devices placed at an angle.

Question 3

What is the recommended minimum length formula for a merging taper on roads with speeds of 45 mph or greater?

Accepted Answer

L = WS²/60

Answer

For speeds ≥45 mph, the MUTCD formula L = WS²/60 is used, where L is taper length in feet, W is offset width in feet, and S is posted speed in mph.

Question 4

A 'one-lane, two-way' operation is most safely managed by a flagger when the queue length does not exceed:

Accepted Answer

1,000 feet or sight distance limitations

Answer

Flagger-controlled one-lane operations work best when queues are short enough that flaggers can see each other or communicate; long queues may require pilot cars or signals instead.

Question 5

What is the purpose of a 'shifting taper' in a work zone?

Accepted Answer

To laterally shift traffic away from the work area without reducing the number of lanes

Answer

A shifting taper moves all traffic lanes laterally to provide clearance for work activities while maintaining the same number of through lanes.

(MOT) Maintenance of Traffic Certification Practice Test

(MOT) Maintenance of Traffic Certification Practice Test

MOT Work Zone Planning & Design Principles 3