Then you can do what was done when these things came up for emissions and have tire checks along with your smog checking. Tread depth doesn't even need a fancy

Then you can do what was done when these things came up for emissions and have tire checks along with your smog checking. Tread depth doesn't even need a fancy inspection site. A parking officer could easily be checking tread depth while they are also looking for double parked cars and out of registration tags.