Flagging protects the work crew and offers guidance and direction to the traffic. In work zones, flaggers are required to maintain continuous traffic flow at safe speeds, especially when only one lane is available for traffic to funnel from two directions. Drivers should be warned in advance with Flagger signs that there will be a flagger ahead. Flaggers must use STOP/SLOW paddles, paddles with lights, or flags. They also need to be dressed in high-visibility safety apparel that meets ANSI/ISEA Class 2 or 3 requirements, that ensure they are visible from a minimum distance of 1,000 feet.Flaggers also use hand signals and it’s important to be familiar with them.  When a flagger’s paddle says “STOP,” slow down to a stop until further instruction from the flagger comes. In a construction zone that has only one lane to use, flaggers will allow one lane of traffic to flow at a time.  When it is okay and safe to proceed, the flagger will flip their paddle around to “SLOW.” A wave of the arm shows that it is safe for you to proceed at a slow speed. If the flagger indicates you to slow down with the paddle turned to “SLOW,” and with an up and down hand gesture, it means you need to drive at a slow speed in the work zone