Ah, I missed your update, thanks for posting that. I guess we can't be totally sure that the red light tickets in question are automated. But it seems pretty l

Ah, I missed your update, thanks for posting that. I guess we can't be totally sure that the red light tickets in question are automated. But it seems pretty likely given that Baltimore does have automated red light ticketing (http://cityservices.baltimorecity.gov/parkingfines/ http://cityservices.baltimorecity.gov/parkingfines/), and this dataset seemed to only contain automated versions of moving violations (ie, it had mobile and fixed speed cameras but not policeman-in-a-cruiser speeding tickets). Also it's just a ton of red light tickets, and in my personal experience street cleaning or meter tickets feel way more common than manually dispensed red light tickets. I was a bit disappointed that this (and other datasets in Baltimore and SF) didn't have a codebook anywhere to explain the data. I'm guessing you weren't able to find one, either?