It’s happened to all of us.

Your subway line is shut down without any advance notice. Your commuter train waits and waits on the tracks, with no explanation. You rush to the airport to catch your flight, only to find that it has been inexplicably delayed. New York’s extensive mass transportation network moves millions of people every day, but it’s only when the system breaks down that we realize how critical it is to our everyday lives.

As federal funding has been harder to come by, state and city officials are trying to find ways to improve and expand that network. Gov. Andrew Cuomo this year spoke of some $100 billion in public projects, a program headlined by the Second Avenue Subway, the Gateway rail tunnel and an overhaul of LaGuardia Airport. For his part, New York City Mayor Bill de Blasio is pitching everything from streetcars to ferries to more dedicated bus lanes. In this special section, City & State navigates the issues at play as these officials try to get New Yorkers moving.