This is the research document for Element C of Component I of the rubric, which entails identifying previous and currently existing solutions to our problem. Through this research we realized that there a number of existing designs for durable sidewalks. The primary material for them is rubber, allowing the to flex rather than crack with time. However, they have not been implemented widely mainly due to funding and city approval, which creates more of a political problem than an engineering one. As a result, we are approaching the problem now from a new standpoint, in which we will try to design a solution that functions outside of the sidewalk itself.
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