CA Flagger Night and Low-Visibility Flagging

Question 1

What class of high-visibility apparel does California require flaggers to wear during nighttime operations?

Accepted Answer

Class 3

Answer

Class 1

Answer

Class 2

Answer

Class 4

Question 2

During nighttime flagging, the STOP/SLOW paddle should be:

Accepted Answer

Retroreflective or illuminated

Answer

Standard red and orange only

Answer

Any color the flagger can see clearly

Answer

Painted with phosphorescent paint

Question 3

The minimum illumination level required at a California nighttime flagger station is:

Accepted Answer

1 foot-candle

Answer

0.5 foot-candles

Answer

3 foot-candles

Answer

5 foot-candles

Question 4

When flagging at night, advance warning signs should feature:

Accepted Answer

High-intensity retroreflective sheeting

Answer

Standard paint finish

Answer

Fluorescent paint only

Answer

LED backlighting only

Question 5

At night, channelizing devices such as cones and drums must be:

Accepted Answer

Retroreflective or equipped with lights

Answer

The same standard devices used in daytime

Answer

Larger than daytime devices

Answer

Made of metal for increased durability

Question 6

If fog significantly reduces visibility during a flagging operation, the flagger should FIRST:

Accepted Answer

Alert the supervisor and consider slowing or stopping traffic

Answer

Continue operations as normal since fog is temporary

Answer

Reduce spacing between devices only

Answer

Use a personal flashlight and continue flagging

Question 7

For night flagging operations, the advance warning area may need to be:

Accepted Answer

Extended because drivers need more time to react

Answer

Shortened to reduce driver confusion at night

Answer

The same length as daytime operations

Answer

Eliminated since nighttime speeds are typically lower