You may have come across the detectable warnings on sidewalk ramps before crossing the street. They're called truncated domes, which are surface indicators designed to assist those who are visually impaired, like Rachel Fisher.
In a typical year, more than 50 blind runners complete the California International Marathon with guides; 53 runners who identified themselves as having a vision impairment finished the New York City Marathon in 2019. Many others ran shorter races.
For pedestrians who cannot see or have limited vision, navigating the chaotic sidewalks and crosswalks of New York City was dicey enough before the pandemic. But the outbreak, blind people say, has made crossing the city’s streets even riskier and more harrowing.
The most widely used construction material on the planet, it has given us sculptural buildings, sturdy bridges and dams, parking garages and countless other structures that surround us. But concrete is also responsible for about 8 percent of global carbon emissions. If concrete were a country, it would rank third in emissions behind China and the United States.