MOT Nighttime Work Zone Operations 2

Question 1

What is the minimum retroreflectivity requirement for Type III barricades used in nighttime work zones?

Accepted Answer

100 cd/lux/m²

Answer

MUTCD requires Type III barricades to have retroreflective sheeting meeting a minimum of 100 cd/lux/m² for nighttime visibility.

Question 2

When setting up a nighttime lane closure on a high-speed highway, how far in advance of the taper should the first warning sign typically be placed?

Accepted Answer

1,500 feet or more

Answer

On high-speed highways (55+ mph), the first advance warning sign is typically placed 1,500 feet or more before the taper, with greater distances needed at night.

Question 3

Which type of channelizing device provides the BEST nighttime visibility in a work zone?

Accepted Answer

Cones with reflective collars

Answer

Cones equipped with retroreflective collars or sleeves significantly improve nighttime visibility by reflecting headlight beams back to drivers.

Question 4

What does the term 'glare bomb' refer to in nighttime work zone operations?

Accepted Answer

An overlit work zone that blinds approaching drivers

Answer

A 'glare bomb' describes an excessively bright work zone where over-lighting blinds approaching drivers, increasing crash risk.

Question 5

How should flagger stations be illuminated during nighttime operations per MUTCD guidelines?

Accepted Answer

Flagger stations should be illuminated with at least 5 foot-candles of light

Answer

MUTCD guidelines recommend flagger stations be illuminated with a minimum of 5 foot-candles so drivers can see the flagger and their signals clearly.

(MOT) Maintenance of Traffic Certification Practice Test

(MOT) Maintenance of Traffic Certification Practice Test

MOT Nighttime Work Zone Operations 2