PPP agreement to fund universal wireless connectivity on New York Subway
https://www.railwaygazette.com/metros/ppp-agreement-to-fund-universal-wireless-connectivity-on-new-york-subway/62333.article
Since New York Subway was built in the era telecommunication infrastructure was not common, it must have been difficult to install wireless connectivity systems. For example, workers had to dig holes in subway stations to lay cables underground space.
