Safety, Work Zone Practices, and Personal Protection
Setting up the work zone
Every signal task happens inside a temporary traffic control (TTC) zone, and MUTCD Part 6 is the language of that zone. Know the four component areas: advance warning, transition, activity area, and termination area. Devices must be visible, spaced for the posted speed, and removed promptly when work ends. Flagger stations belong where approaching drivers have clear sight distance and the flagger has an escape route. Never stand in a lane with your back to traffic, and never assume a driver sees you because you see the vehicle.
Personal protection
High-visibility apparel class depends on speed, volume, and time of day; Class 2 is the common minimum and Class 3 is typical at night or in low-visibility conditions. Standard PPE includes hard hat, eye protection, gloves, and EH-rated footwear. For electrical work, treat every conductor as energized until verified otherwise: apply lockout/tagout with a personal lock and tag, test before touch with a meter proven on a known source, and use insulated gloves with leather protectors.
Elevated and electrical work
Bucket trucks require a harness and lanyard, outriggers on stable ground, wheel chocks, and a spotter. Do not exit an elevated bucket, and keep the boom clear of energized lines. Stay outside minimum approach distances for unqualified persons.
Traps
Questions often mix "good practice" with "required by standard." An open switch does not prove a circuit is dead. Police are not required at every flagging operation. The employer cannot substitute a lower apparel class because it is hot outside.
Rule of thumb
Test at the point of work, not at the panel. A quick worked check: if the meter reads zero on a known live source, the meter or leads are bad, so stop and re-verify before touching anything.