Regina- Can you use a slightly wider tire? I am concerned about the amount of road debris.

I should have mentioned earlier I will only be riding about 2 miles of city and of that 1 mile is just a HUGE shoulder but there is a hairy intersection. Otherwise it is a huge shoulder I frequently ride on the weekends. I also work 7-4 and would be in moderate traffic. I will be at the office before traffic really picks up and the afternoon I will mostly be ahead of the traffic again. I have never commuted by bike so I am not sure what I want. I am liking the options so far!