Can I change DRIVING speed in Directions API to a constant?

The actual problem is that I am trying to use the bicycle mode of transportation but in my area there aren't any bike lanes so with any other transportation mode the app calculates the correct route and time but whenever I am selecting the bicycle mode, the LOGCAT where it should print the details shows this:

 D/LocationService: getLocation: getting location information.
 V/FA: Processing queued up service tasks: 1
 I/System.out: (HTTPLog)-Static: isSBSettingEnabled false

 D/LocationService: onLocationResult: got location result.
 I/System.out: (HTTPLog)-Static: isSBSettingEnabled false
 D/ViewRootImpl@895f610[MainActivity]: ViewPostIme pointer 0
 D/ViewRootImpl@895f610[MainActivity]: ViewPostIme pointer 1
 calculateDirections: calculating directions.
 calculateDirections: destination: 44.43531100,26.20092790
 onLocationResult: got location result.

 Do full code cache collection, code=503KB, data=358KB
 After code cache collection, code=493KB, data=295KB
 onLocationResult: got location result.

 V/FA: Inactivity, disconnecting from the service
 onLocationResult: got location result.

calculateDirections: Failed to get directions: length=0; index=0