MOT Temporary Traffic Control Plans 3

Question 1

Under the MUTCD, what is the minimum retroreflectivity requirement for temporary traffic control signs used in work zones?

Accepted Answer

They must meet the same retroreflectivity standards as permanent signs

Answer

MUTCD requires TTC signs to meet the same minimum retroreflectivity levels as permanent regulatory and warning signs.

Question 2

A TTC plan specifies 'channelizing devices at 20-foot spacing.' Under what condition would spacing need to be reduced?

Accepted Answer

Through a curved or complex transition area where visual guidance is critical

Answer

Tighter device spacing is required in curved or complex areas to provide continuous clear guidance to drivers through the transition.

Question 3

What is the significance of a 'short-duration' work zone classification in TTC plan development?

Accepted Answer

It allows simplified TTC setups because the operation lasts 15 minutes to 1 hour

Answer

Short-duration operations (15 min to 1 hr) permit simplified TTC arrangements compared to longer-term stationary work zones.

Question 4

In a TTC plan for a divided highway, what must be included when closing a median crossover for emergency access?

Accepted Answer

Alternative emergency vehicle access routes clearly shown on the plan

Answer

TTC plans must document and provide alternative emergency vehicle access whenever a median crossover is closed.

Question 5

A contractor wants to use arrow boards at a lane closure. According to MUTCD, which mode should the arrow board display for a lane closure taper?

Accepted Answer

Sequential chevron mode

Answer

Sequential chevron (arrow) mode is the correct display for an arrow board at a lane closure taper to direct traffic to merge.

(MOT) Maintenance of Traffic Certification Practice Test