I frequently call out rail-trails for this same problem. They go through the trouble of reopening historic bridges yet fail to acknowledge the bridges as historic. Why wouldn't you post some interpretive signage about the historic bridge? It only makes the work that they have done seem all the more great and important.
Rode bikes there last 2 Saturdays and didn't see another person. Why isn't it promoted as it is so special + one of 3 in the world? Why are orange plastic pieces tied to gaurd rails? Signage on IL side terrible to connecting trail over there.