Add road type based on OpenDRIVE to logical lanes

The road type is useful since traffic participant models might want to
influence their behavior based on the type of road that they are driving
on, or make decisions in terms of navigation based on that information.
It is also helpful to display a road in a navigation system, as
typically different road types are displayed differently.

Signed-off-by: Daniel Mata <Daniel.Mata@partner.bmw.de>

Author: Daniel Mata

osi_logicallane.proto

@@ -589,6 +589,10 @@ message LogicalLane
     //
     repeated TrafficRule traffic_rule = 17;
 
+    // The road type of the logical lane.
+    //
+    optional RoadType road_type = 18;
+
     //
     // Definition of available lane types.
     //
@@ -951,5 +955,73 @@ message LogicalLane
         }
     }
 
+    //
+    // Definition of available road types.
+    //
+    // The road types are aligned with OpenDRIVE and describe the type of a
+    // higher structure that spans one or multiple logical lanes.
+    //
+    enum RoadType
+    {
+        // Lane of unknown type. Do not use in ground truth.
+        //
+        ROAD_TYPE_UNKNOWN = 0;
+
+        // Any other type of road.
+        //
+        ROAD_TYPE_OTHER = 1;
+
+        // A road designated to accomodate multiple road users,
+        // such as pedestrian and cyclist.
+        //
+        ROAD_TYPE_LOWSPEED = 2;
+
+        // A road specially built for fast travel over long distances.
+        //
+        ROAD_TYPE_MOTORWAY = 3;
+
+        // A pedestrian exclusive road.
+        //
+        ROAD_TYPE_PEDESTRIAN = 4;
+
+        // A country road which is often narrow and unpaved.
+        //
+        ROAD_TYPE_RURAL = 5;
+
+        // A high capacity urban road.
+        //
+        ROAD_TYPE_TOWNARTERIAL = 6;
+
+        // An auxiliary road to direct traffic from the residential areas
+        // to the arterial roads.
+        //
+        ROAD_TYPE_TOWNCOLLECTOR = 7;
+
+        // A motor vehicle exclusive road designed to connect highways
+        // with urban areas.
+        //
+        ROAD_TYPE_TOWNEXPRESSWAY = 8;
+
+        // A road intended to serve residential areas.
+        //
+        ROAD_TYPE_TOWNLOCAL = 9;
+
+        // A street that is closed to through traffic and is designated
+        // for children's play activities.
+        //
+        ROAD_TYPE_TOWNPLAYSTREET = 10;
+
+        // A town road which is part of a private property.
+        //
+        ROAD_TYPE_TOWNPRIVATE = 11;
+
+        // A regular town road.
+        //
+        ROAD_TYPE_TOWN = 12;
+
+        // A road that is designated for cyclists.
+        //
+        ROAD_TYPE_BICYCLE = 13;
+    }
 }