Friday morning I noticed there was a blue stripe missing from a police car, right above the orange arrow. Ben thought it could have been intentional, but I insisted it was a mistake.
Later in the afternoon I also saw a police car with no stripes in the area inside the green square, and another vehicle, a station wagon (?), with the same paint job as above. I'm not sure what the "proper" finished look is supposed to be; perhaps the stripes at the back are optional.