Loyd Sigman's Garage Door Opener
Winch and pulley


Loyd Sigman


Chain and Gear Mechanism


Shows location of ongoing accidents and emergency situations


Fleeting, view can disappear within seconds


Installing inside a fully closed area

Collected by

Warehouse 13







Date of Collection

May 25, 2003



SigAlert is a highly revered news announcement in the metropolitan Los Angeles circuit. Radio stations would broadcast updates of any sizable traffic accident that could kill commute time to a standstill. Specifically, a minimum blockage of one lane and 30 minutes of stalled service. California Highway Patrol also addressed other emergencies through they system, including a train derailment in ’56, dam collapse in ’63, gas leaks, ship collisions and hilariously, a pie truck overturning on the highway in ’98. Most drivers were thankful for the system, but had no idea where the name came from. Signal alert was a common moniker, almost as popular as “stay in garage”.

A local resident Loyd Sigmon crafted up the idea for of all things, a radio station. Competition was tough between different broadcasters and the specialist in Sigmon came up with a brilliant idea – report on live traffic blocks to give audiences a solid reason to tune in. His setup was just as simple. A police receiver activated a recorder, which would then signal all stations of incoming updates. The LAPD rejected the plan outright due to the extra hassle for officers, but later asked for the system to alert all stations for maximum coverage.


The entire RC garage door opener wrenched out from his suburban home. Installing it inside a closed room of any size would project visions of current emergencies in the immediate area. All the doors and windows waver with the mirage of a distant place, usually surrounded by EMS or gathering crowds. Location data such as street names or landmarks appear to flicker momentarily. Different scenes will cycle through other accidents until everything within city limits has been shown. Each can last from a minute to seconds, so it’s important to have a good memory (mental or camera) when used.

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