Energy efficient. Low-floor accessibility. No overhead wires. A sleek, modern style resembling a light-rail train.In a nutshell, those are some of the modern streetcar design characteristics that transit agency officials in many North American cities are interested in, streetcar builders say.Although the North American streetcar market currently is relatively small, interest in exploring streetcar systems is growing, and builders are monitoring that interest. According to the American Public Transportation Association's
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