I think some of the more experienced forum members here can help you better than I, but I'll give you my initial thoughts.
1) The block numbers are effectively portrayed. I immediately knew where to look on the map for the numbers.
2) But I have no idea where I'm at. My presumption is that you are only interested in serving the block numbers for the one road in the center, right? Is that Railroad St? Or some other street that is currently unlabeled? Oops!
I just noticed the title. But, wouldn't an officer want to know the block numbers on all the streets? I would imagine that an officer, looking quickly at a map would first want to quickly orient themselves in relation to other streets (intersections) and then hone in on the block of interest (6105 Center St). I wonder if small, but legible block numbers on the highway and roads would be better (at a different scale). But then again, I'm not entirely sure what the purpose of the map is.
3) Oh, just an aside, though your officers may be intimately familiar with your town, I think a north arrow and scale bar would still be helpful, and maybe a locator map. Just a few ideas.
Hope that helps...