If you're looking for E-6 processing, one of the best processors in the nation is just across the bridge up in the Soo. Take a look at http://www.agximaging.com/. I don't know what his turn around is, but the quality is reputed to be very high. If you're looking for C-41, there are a handfull in Grand Rapids and I'd be surprised if there wasn't at least one in Big Rapids, but I'm sure that you get there more frequently than I.
As for the traffic signals, I guessed that was what you meant but I couldn't resist! Baldwin has become such a metropolis you know.