This is like season 7 of this series (and might be the last).
Its now in HD, and the animation quality has improved a little. The story remains the same - everyday life of people in the traffic police department. There is some romance and our main 2 characters do things far beyond normal traffic police women and this is what makes the show interesting.
The rating is low because its not quite realistic, a lot of story lines are forced, the romance is not done well, etc. Still its just a relaxing slice of life anime of some interesting and beautiful police women.