Sequential Barricade Warning Lamp

Pi-Lit® Sequential Barricade Warning Lamps enhance safety for work-zone personnel as well as motorists entering the work zone.  Much as a pilot is guided to the runway by the sequential flashing strobes (“rabbit”), sequential warning lamps aid the driver by guiding them safely through the work zone.

Drivers approaching the work zone are often  confused by the number of flashing lights, vehicle light bars, and “flood lamps” located in the work area. The Pi-Lit® Sequential Warning Lamp is designed to help prevent work zone accidents due to driver confusion. The Sequential Barricade Warning Lamp mounts on any drum, vertical panel, or barricade, and communicates with one another to form a smooth and calming pattern that guides motorist safely through the work zone. 

A number of studies have shown that the use of sequential warning lamps at the entrance of a work zone reduces vehicle speed and enhances driver compliance. Drivers approaching the work zone see the visual warning and guidance which results in earlier merging and slowing, thereby reducing the chance of incident.


  • Intelligent radio technology automatically position barricade lamps in correct sequence making deployment simple and quick. No Master Slave; No infra-red limitations. Just mount and turn on. That simple.
  • Operates in a "Mesh" network using 2.4GHz radio communication. Not affected by weather (rain, snow, fog, or other obstruction).
  • 1000 feet range (300 meter) between lamps. As long as one lamp is in range of another the message will get passed along. This means you can have miles of lamps and the sequential network will still communicate.
  • Supports tapers of any number of lamps
  • Can be deployed in any shape (circle, linear line, around corners/bends, etc.)
  • Exceeds I.T.E and MUTCD (section 6F.83) specifications.
  • Powered by 4 alkaline D-Cell batteries. ~4-5 months continuous-flash battery life.
  • Operational in any weather; rain, snow, fog, sleet. Unlike lamps that use infra-red communication, weather will not attenuate the radio signal.
  • Improved case design allows for batteries to be dropped in from top, allowing for the lamps to remain bolted when changing batteries. Less time on the highway or in shop. Improved safety and enhanced savings!


  • Control panel for ease of operation (lockable)
  • Remote Control: Operate and change lamp characteristics from 1,000 feet (300 meters) away
  • Five different sequence patterns to choose from (operator's preference)
  • Five "Group Channels" to choose from. Multiple strings of lamps can be used in close proximity without interference. Can be changed from any one lamp.
  • Lamps will continue to flash in sequence even with a damaged or depleted-battery lamp. System does not get disrupted
  • Insert feature allows a new lamp to replace a damaged lamp without having to turn off entire system
  • Choose between 24-hour mode (flash all day and night) or 12-hour mode (flash when ambient light is diminished)
  • Steady-burn with sequencing; or steady-burn only
  • Bidirectional (front lens only, back lens only, or both)
  • Case design allows lamps to be permanently bolted to a wood post, concrete rail, "Jersey Rail", etc.
  • Standard color cases to choose from: Yellow, Orange, Grey, Blue (Special color available upon request)


The default pattern: One lamp flashing as it marches down the string. Simple, efficient (battery life ~5 months), effectively guides drivers through a work zone or into a designated parking area. 

From a distance two lamps flashing provide more visibility and guidance. Slightly greater burden on the battery as each lamp is lit twice per cycle. ~3-4 months of continuous flashing. But it sure looks good!

Using Pulse Width Modulation (PWM) we can offer a “tail-off” that provides a more calming effect. Looks smooth and greatly enhances guidance. Uses a bit more energy; ~3 months (or more) of continuous flash time.

Want to get the drivers attention? The Pi-Lit “Fast” pattern emulates the airport runway “rabbit” demanding the drivers eye. They can’t miss it, and this pattern quite effectively slows traffic. You will hear drivers exclaim, “What is that?” as they slow down. Uses the least energy;  ~5-6 months continuous flashing.

More of a tool to designate a barrier or delineator marking the edge of a road way, the simultaneous flash mode can be seen from great distances and paints an edge to the intended path. Battery consumption similar to pattern 3, the “Wave.” Expect ~3 month of continuous flash.

Barricade Specifications:

  • Powered by 4 D-cell alkaline batteries
  • Battery life = ~4-5 months of continuous flashing (battery status check with push of a button)
  • 2.4 GHz Radio Communications – FCC Compliant
  • 1000 foot range (300 meter) between lamps
  •  Complies with I.T.E and MUTCD Regulations
  • 4 Sequential flash patterns, 1 simultaneous flash pattern
  • Steady-Burn feature – With or without sequential flash
  • 24 hour mode or night time only mode – Photocell detects sunlight and places the lamp in sleep mode until ambient light diminishes
  • New case design allows for easy battery replacement and long-term/permanent mounting of lamp
  • Remote control from 300 meters ((1000 feet)
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