title: Getting toll data from Google Maps or other maps provider for a given route in a mobile app
body: <p>I am building a mobile app for users to use when driving. It will keep track of the user's location, and at the end of the trip it will tell the user the distance travelled, and the cost of the trip. </p>
  
  <p>The cost of the trip will be calculated by the distance travelled * cost per km and any additional toll costs. The issue I have now is getting the toll data. </p>
  
  <ol>
  <li>What maps provider can I use to get this toll data reliably? I heard Google Maps, HERE maps and OpenStreetMaps have them. </li>
  <li>How do I get toll data? I looked around online and could find that they can provide the toll data if the route is pre-calculated by the map provider (I send in the start and end location). For my app, I'm unsure where to look or what to look for. I guess I will be storing a series of GPS coordinates as the user drives, do I just send all these coordinates to some API to process?</li>
  </ol>
  
  <p>Thanks. </p>