title: What are some of the problems with GTFS?
body: <p>I am intersted in replacing my current data format that I use with GTFS, but I hear and read from here and there that there are flaws in GTFS file format.</p>
  
  <p>Most of the time I see that you can't somehow predict some things such as delays or some real-time stuff. They say you can't get the "whole picture" with them.</p>
  
  <p>So what I am asking is there anyone more experienced with GTFS , since I am seeing them only for first time, that could have possibly used GTFS in some kind of application and could tell the problems they have faced while developing?</p>
  
  <p>Maybe someone has a suggestion about a better kind of file format? Or a combination of some formats?</p>