SQ4® Portable Emergency Intersection Control System

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The SQ4 Portable Traffic Signal System has been specifically designed for authorities to respond quickly and safely to emergency intersection control. The SQ4 is ideal for emergency intersection control resulting from loss of infrastructure power. Whether it's a hurricane, tornado, earthquake, or a man-made disaster, the SQ4 provides safe, reliable performance that you can count on every time.

A compact footprint, reflective delineation and unmatched reliability facilitate the placement of the SQ4 in the center of the intersection. The SQ4 system is equipped with an onboard power plant capable of providing continuous run-time in excess of 21 days without auxiliary charging. Deployment heights of 10 ft and 14 ft enhance visibility and software based operating system conforms to NEMA performance standards. With appropriate add-on components, the SQ4 can be converted to an SQ2T portable traffic signal for use in typical work zone traffic control applications.


Designed for intersection control and available with dedicated turn arrows

Designed for short-term intersection control which can be extended with the addition of solar panels

Complete conflict monitoring with built-in redundancy ensures safe operation

Designed to facilitate fast, efficient deployment in the aftermath of an event


Additional Specifications

SKU 119577
Signal Heads per Trailer 4
Signal Head Size 8 in diameter
Power Source (8) 6-volt batteries
Deployed Height 13 ft 2 in
Trailer Weight 840 lbs
Footprint 62 in x 62 in

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