Decision Grid: AFAD vs. Traffic Signals
Category
Automated Flagger Assistance Devices (AFADs)
Temporary Traffic Signals
Deployment Duration
Short to intermediate (1 shift to ~3 days)
Trailer-mounted: intermediate, long-term Trolley (pedestal)-mounted: short term (often under 72 hrs) Automatically operated with pre-timed plans or sensor- actuated timing. Trailer-mounted: large. Requires trailer positioning. Trolley (pedestal)-mounted: Compact. Fits on narrow shoulders or bridges. Trailer-mounted: lane closures, intersections, haul roads, knock-downs.
Control Type
Manual control by trained flagger with clear line of sight, per MUTCD.
Footprint
Moderate: best for open shoulder or temporary roadside. Requires safe positioning area.
Primary Applications
Daily flagging, pilot car operations.
Trolley (pedestal)-mounted: Maintenance, bridge work, urban flagging.
Traffic Detection and Monitoring
Optional camera and incident video and storage.
Certain models offer optional camera, remote video monitoring, sensors, and Driveway Assistance Device (DAD) integration. Autonomous with solar panels & rechargeable battery. Trailer-mounted: Requires trailer transport. Trolley (pedestal)-mounted: Highly portable. Can be moved manually. Trailer-mounted: High visibility, long-term use. Provides full inter- section control. Trolley (pedestal)- mounted: Flexible and compact. Quick setup. Useful where flagger escape routes are unavailable. Longer setup time: may require plan approval or temporary markings.
Power
Autonomous with solar panels & rechargeable battery. Quick deployment. Trailer or hitch- mounted.
Mobility
Advantages
Increased flagger safety & motorist compliance. Good for short-term work. Integrates with pilot car operations.
Limitations
Requires flagger. Not ideal for high- volume or long-term work.
QUEBEC, CANADA OFFICE: 1781 BRESSE STREET, QUEBEC CITY, QC, G2G 2V2, CANADA CONROE, TX OFFICE: 3479 POLLOK DR, CONROE, TEXAS, 77303, US T. 418-654-1303 TF. 888-488-7446 F. 418-654-0517
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