Lights/Cameras? at North Portland Junction

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pdx.sparky

New Member
I remember seeing these, in the 90s, @ NPJ. Couldn't figure out what they were for.
orsps008up2059.jpg


Anyone know what those things are, on the left of the photo?
thks
 

MP 6.7

needs to get a life. ;)
It's a reader for the old school optical ACI (automatic car identification) tags. The lights would illuminate the tag and the reader would recognize the different bars as numbers. The bars were made of scotchlite-type material that was highly reflective so the system could easily recognize them. I seem to remember there used to be a reader at Reservation a while back. I'd go by it as a kid always wondering what it was ;)

Here's some info

aci-panel.jpg
 




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