<p>If you live in an American city and you don’t personally use a wheelchair, it's easy to overlook the small ramp at most intersections, between the sidewalk and the street. Today, these curb cuts are everywhere, but fifty years ago -- when an activist named Ed Roberts was young -- most urban corners featured a sharp drop-off, making it difficult for him and other wheelchair users to get between blocks without assistance.</p><p><a href="https://99percentinvisible.org/?p=25041&post_type=episode" target="_blank">Curb Cuts</a> plus a special announcement from Roman Mars about the future of 99pi.</p>
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