Introducing Factions Redux, a comprehensive overhaul mod, revigorating the various different groups that populate Chicago as we know it in Watch_Dogs. Now featuring in update 2.0; a comprehensive police rebalance, new sub-factions such as "Undercover" units and Illinois State Police, Living City merge and much more.
Seems like it's based on the old livery, the newer ones have the number on the door: I.pinimg.com
Indeed, WD takes place in 2012-14 so we've *mostly* based designs around older stuff, as we imagine phasing them out takes its sweet time. They also alternate and have some differences to the overall livery (even numbers!).
We have made some exceptions too, where the police have also some alternating variations between blank rear and including stripes.