A set of values used to specify the mode of travel.

| Enums ||
|---|---|
| `ROUTE_TRAVEL_MODE_UNSPECIFIED` | No travel mode specified. Defaults to `DRIVE`. |
| `DRIVE` | Travel by passenger car. |
| `WALK` | Travel by walking. NOTE: `WALK` routes are in beta and might sometimes be missing clear sidewalks or pedestrian paths. You must display this warning to the user for all walking that you display in your app. |
| `BICYCLE` | Travel by bicycle. |
| `TRANSIT` | Travel by public transit. |