To request a public transport route using the CalculateRouteRequest service, you must specify the start (waypoint0) and destination (waypoint1) waypoints and choose a public transport routing mode. Additionally, you must include your authentication credentials, app_id and app_code with each request to the Routing API.

This request queries a route using estimated public transport and specifies a walk radius (in meters) used for finding public transport stations at the start and end of the route. Transit stations farther away from the start and end points of the route will not be considered. See also Calculate Route for documentation on request parameters.

https://route.api.here.com/routing/7.2/calculateroute.json
?app_id={YOUR_APP_ID}
&app_code={YOUR_APP_CODE}
&waypoint0=geo!52.530,13.326
&waypoint1=geo!52.513,13.407
&departure=now
&mode=fastest;publicTransport
&combineChange=true
&alternatives=3
&walkRadius=500