The appearance of battery-powered electric buses in American cities could represents a technological milestone for this workhorse of mass transit. Give or take the addition of air-conditioning and a few other tweaks, riding a bus hasn’t changed much in the decades since diesel coaches supplanted streetcars. But big changes are now coming to the bus world. Here are five breakthroughs in technology and design that could help this humble mode reclaim its place atop the urban mobility food chain.
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