Sign Language: expert trainspotting
Toronto is served by an efficient network of subway, buses, and street cars. However, the signage for these modes of transit are confusing as they look so similar to one another. Each one is the front view of the vehicle - a squarish object with two feet extending downwards. In particular, the streetcar icon could very easily be interpreted as a bus.
I do give props to the Toronto Transit Commission for sticking to an old school logo and not updating it with a swoosh, motion-representing graphic, or icon that resembles the London Underground, as many other transit systems have done.