Warning Light

A warning light is a self-powered flashing or steady-burn lamp that alerts drivers and workers to hazards, closures and equipment at night and in low visibility. Mounted on barricades, drums and posts, the lights run independently on batteries or solar charge. The catalog lists 7 models from Wanco and Checkers Industrial.

Modèles

Varies by model

Power source

Marques

Fonctionnement

An LED or lamp head on a sealed, weatherproof housing flashes or burns steadily from its own battery, with photocells switching operation to darkness and solar models recharging by day. Mounting hardware clamps the light to barricade rails, drums or dedicated posts. The MUTCD assigns duties by type: low-intensity flashers mark isolated hazards at night, high-intensity flashers work around the clock, and steady-burn lamps trace channelizing lines through closures.

Types et variantes

Type A low-intensity flashers: Nighttime flashers marking isolated hazards and single devices.
Type B high-intensity flashers: Continuous-duty flashers visible in daylight for advance warning points.
Type C steady-burn lights: Constant lamps outlining tapers and channelizing runs at night.
Solar-rechargeable units: Photocell-controlled lights that recharge by day for long unattended deployments.

Spécifications clés

Spécification	Plage typique	Signification
Power source	Varies by model	Battery or solar-recharged operation sets how long the light runs unattended.
Mounting type	Varies by model	Clamp and bolt patterns must match the barricade rails, drums or posts on the job.
Flash pattern	Varies by model	Flashing versus steady-burn maps to the MUTCD type and therefore the legal application.

Comment l'industrie le dimensionne

Warning lights are selected by MUTCD type rather than physical size: the traffic control plan dictates flashing or steady-burn duty and where each is placed. Planning is then a count-and-endurance exercise — enough units for every device that needs one, with battery or solar endurance covering the closure duration between maintenance visits.

Applications

Marking barricades and drums through nighttime closures
Advance warning points ahead of work zones
Outlining tapers and channelizing runs after dark
Flagging equipment and material staged near traffic

Sécurité et opération

Dead lights on a night closure are a serious hazard — batteries are checked and units test-flashed at every zone inspection.
Lights supplement retroreflective devices; they never substitute for compliant sheeting on the devices themselves.
Mounting must be secure — a light shaken loose by traffic blast becomes road debris in the travel lane.

Normes et certifications

FHWA · MUTCD: Defines warning light Types A, B and C and assigns their applications in temporary traffic control.
ATSSA: Industry guidance on selecting and maintaining work zone warning devices.

Questions fréquentes

What is the difference between Type A, B and C lights?

Type A flashes at low intensity for nighttime hazard marking, Type B flashes at high intensity around the clock for advance warning, and Type C burns steadily to outline channelizing runs at night.

When are warning lights required on barricades?

The traffic control plan specifies them, typically for nighttime closures and hazards needing emphasis beyond retroreflective sheeting.

How long do the batteries last?

Endurance varies by model and duty; solar-rechargeable units extend unattended runtime, and zone inspections include verifying every light still operates.