If Google Maps is for locating places, Waze is for navigating the roads and highways to get there. Not everyone, however, drives or even use ride-hailing services like Uber or Lyft. While trains and buses are unlikely to stray off the beaten path, they are at the mercy of delays and incidents that could catch riders unawares. That's where the Pigeon app comes in to alert riders of any problem and maybe even prevent them from losing their cool, too. All with a little help from other riders.