Today I saw another one.
This time it was set up at the intersection of Berger Road and Gerwig Lane in Columbia. I parked the car and went over to check it out. That’s when I saw this tag on the black box at the base of it.
I’m still not sure what type of data it is supposed to collect but three months after one of these things appeared in Ellicott City the intersection changed from a two way stop to a four way stop.