Southern Autoflow
This 4 way was made by The Southern Switch Co, of Shreveport, La. They were originally a maker of electrical devices. Sometime in the early 1950's, they began manufacturing traffic signal equipment, including 4-ways, called Autoflows. This signal came with only 3 visors. They were cutaway style. Southern Autoflow signals are not very common so I opted to replace the hard to find original visors with modified Eagle tunnel visors. You can see what this signal might have looked like with its original visors on Signalfan's web site.
Click on the animation to see more about this signal.
The bottom piece of this signal has mounting holes for a controller that could be contained in the signal itself. This signal did not come with one, so a Lights To Go 4 way controller is installed there instead. Signalfan was lucky with his Autoflow because it did come with the original controller. It was configured so that the yellow light came on with the green light, then they both went off when the red light came on. You can see an animation of his Autoflow sequencing like this here.
This page originally posted on 4-20-2004