title: How to get navigation duration with traffic from google maps api?
body: <p>I want to get the navigation duration from google maps api with http request:
  <a href="https://maps.googleapis.com/maps/api/directions/json?origin=src&amp;destination=destination" rel="nofollow">https://maps.googleapis.com/maps/api/directions/json?origin=src&amp;destination=destination</a></p>
  
  <p>but i get the duration without traffic.
  how can i get the duration with traffic?</p>