Work Near Moving Traffic JSA

Roadway work zones have a hazard the rest of construction does not: the main threat is operated by someone outside your control, travelling at speed, who may be distracted, impaired or simply unable to stop. No amount of crew discipline addresses that — only physical separation and the design of the work zone do.

OSHA requires work zone signs, signals and barricades to conform to the Federal Highway Administration's Manual on Uniform Traffic Control Devices, so the MUTCD is effectively part of the rulebook. A traffic JSA should reference the approved traffic control plan rather than reinvent it.

What the work involves

• Setting out and removing temporary traffic control devices
• Flagging and controlling traffic through or around the work
• Working inside the activity area alongside live traffic
• Operating and reversing plant within the work space
• Night work, with its own visibility and lighting demands

Hazards and controls

Controls are listed in hierarchy order — the further down the list a control sits, the less it should be carrying on its own.

1. Worker struck by a vehicle intruding into the work space

• Eliminate: close the road or take the lane fully; do the work when traffic volumes are lowest, or divert traffic away entirely.
• Engineering: positive protection — concrete barrier, barrier-mounted attenuator or a shadow vehicle with a truck-mounted attenuator — between traffic and the crew, not cones alone.
• Engineering: tapers, buffer space and advance warning laid out to the approved traffic control plan and the MUTCD for the posted speed.
• PPE: high-visibility apparel appropriate to the speed and light conditions.

29 CFR 1926.201(a) requires signs, signals and barricades for traffic control in work zones to conform to the Manual on Uniform Traffic Control Devices. 29 CFR 1926.200(g)(2) requires all traffic control signs or devices used for protection of construction workers to conform to the MUTCD.

2. Flagger struck while controlling traffic

• Eliminate: use temporary signals, automated flagger assistance devices or a full closure so nobody stands in the roadway.
• Engineering: flagger station located with escape routes and sight distance for the posted speed, with advance flagger-ahead signing.
• Administrative: trained flaggers using MUTCD methods and devices; never a crew member pressed into it for ten minutes.
• PPE: high-visibility apparel, and retroreflective garments for night work.

29 CFR 1926.201(a) requires flagging and other traffic control to conform to the MUTCD, which sets flagger procedures, stations, signing and apparel.

3. Struck by plant operating inside the work zone

• Eliminate: an internal traffic control plan that separates plant movements from where people work on foot, with one-way circulation to remove reversing.
• Engineering: reverse alarms, cameras and proximity systems; barriers between the plant path and the crew.
• Administrative: spotters for reversing where it cannot be designed out; positive communication before anyone approaches a machine.

29 CFR 1926.601(b)(4) requires vehicles with an obstructed rear view to have a reverse signal alarm, or to be backed only when an observer signals it is safe. 29 CFR 1926.602(a)(9) applies the equivalent duty to earthmoving equipment with an obstructed rear view.

4. Reduced visibility at night or in bad weather

• Engineering: work area lighting positioned to light the task without glaring oncoming drivers; retroreflective devices and lighted arrow boards.
• Administrative: stop criteria for fog, heavy rain and snow; re-check device placement through the shift, since devices get knocked.
• PPE: higher-class retroreflective garments for night work.

29 CFR 1926.56(a) requires construction areas and the work in them to be lighted to not less than the minimum illumination intensities the table lists while work is in progress.

5. Crew exposed while setting out or removing the traffic control itself

• Eliminate: install and remove in the direction of traffic flow, from the shoulder, with a shadow vehicle; consider a rolling closure.
• Engineering: truck-mounted attenuator on the shadow vehicle; devices placed from inside the protected area wherever possible.
• Administrative: brief the set-out sequence as its own task — it is the most exposed part of the day and is usually planned the least.

29 CFR 1926.201(a) requires work zone traffic control, including during installation and removal, to conform to the MUTCD.

A worked example row

This is how one line of the finished JSA reads, with the risk bands scored on the same 4-band matrix the generator prints:

Related work activities

• Working Around Heavy Equipment JSA
• Forklift JSA
• Heat & Cold Stress JSA