Still, the beacons will help make better use of the city’s infrastructure, said Rob Wolcott, clinical professor of innovation and entrepreneurship at Northwestern University’s Kellogg School of Management. In our age of constant connectivity, people avoid what they can’t see on their apps or navigation systems, he said. If the purpose of the underground roadways is to ease congestion above ground, people aren’t making the best use of those streets if they’re avoiding them.