Implemented "smart" routing through priority:

Factors:
speed,
roadtype,
junctions / waychanges.

API/Program.cs

@@ -1,3 +1,4 @@
+using System.Text;
 using System.Text.Json.Serialization;
 using OSMDatastructure;
 using OSMDatastructure.Graph;
@@ -14,8 +15,6 @@ builder.Services.AddSwaggerGen();
 
 var app = builder.Build();
 
-
-
 app.MapGet("/getRouteDistance", (float latStart, float lonStart, float latEnd, float lonEnd) =>
     {
         DateTime startCalc = DateTime.Now;

OSMDatastructure/Tag.cs

@@ -98,19 +98,20 @@ public class Tag
 
     public static readonly Dictionary<WayType, byte> defaultSpeedCar = new() {
         { WayType.NONE, 0 },
-        { WayType.motorway, 110 },
-        { WayType.trunk, 100 },
-        { WayType.primary, 80 },
-        { WayType.secondary, 80 },
-        { WayType.tertiary, 70 },
-        { WayType.unclassified, 20 },
+        { WayType.motorway, 100 },
+        { WayType.motorroad, 90 },
+        { WayType.trunk, 85 },
+        { WayType.primary, 65 },
+        { WayType.secondary, 60 },
+        { WayType.tertiary, 50 },
+        { WayType.unclassified, 15 },
         { WayType.residential, 10 },
-        { WayType.motorway_link, 50 },
+        { WayType.motorway_link, 60 },
         { WayType.trunk_link, 50 },
-        { WayType.primary_link, 30 },
-        { WayType.secondary_link, 25 },
-        { WayType.tertiary_link, 25 },
-        { WayType.living_street, 5 },
+        { WayType.primary_link, 50 },
+        { WayType.secondary_link, 50 },
+        { WayType.tertiary_link, 30 },
+        { WayType.living_street, 10 },
         { WayType.service, 1 },
         { WayType.pedestrian, 0 },
         { WayType.track, 15 },
@@ -160,7 +161,7 @@ public class Tag
         { WayType.construction, 0 }
     };
     // ReSharper disable InconsistentNaming
-    public enum WayType : byte { NONE, motorway, trunk, primary, secondary, tertiary, unclassified, residential, motorway_link, trunk_link, primary_link, secondary_link, tertiary_link, living_street, service, pedestrian, track, bus_guideway, escape, raceway, road, busway, footway, bridleway, steps, corridor, path, cycleway, construction }
+    public enum WayType : byte { NONE, motorway, motorroad, trunk, primary, secondary, tertiary, unclassified, residential, motorway_link, trunk_link, primary_link, secondary_link, tertiary_link, living_street, service, pedestrian, track, bus_guideway, escape, raceway, road, busway, footway, bridleway, steps, corridor, path, cycleway, construction }
     // ReSharper restore InconsistentNaming
 
     public enum SpeedType { pedestrian, car, any }

Pathfinding/Pathfinder.cs

@@ -1,5 +1,6 @@
 using OSMDatastructure;
 using OSMDatastructure.Graph;
+using WayType = OSMDatastructure.Tag.WayType;
 
 namespace Pathfinding;
 
@@ -25,10 +26,112 @@ public static partial class Pathfinder
         if (node2 is null)
             return double.MaxValue;
         double distance = Utils.DistanceBetween(node1, node2);
-        double speed = regionManager.GetSpeedForEdge(node1, edge.wayId, vehicle);
-        if (speed is 0)
+        byte speed = regionManager.GetSpeedForEdge(node1, edge.wayId, vehicle);
+        return speed is 0 ? double.MaxValue : distance / speed;
+    }
+
+    private static double GetPriority(OsmNode current, OsmNode? previous, OsmEdge edge, Tag.SpeedType vehicle, RegionManager regionManager)
+    {
+        if (vehicle == Tag.SpeedType.any)
+            return 1;
+        const double roadPriorityFactor = 1; 
+        const double junctionFactor = 2; 
+        const double wayChangeFactor = 2; 
+        Region r = regionManager.GetRegion(current.coordinates)!;
+        
+        double roadPriority = GetPriorityVehicleRoad(edge, vehicle, r) * 0.1 * roadPriorityFactor;
+        double roadSpeed = regionManager.GetSpeedForEdge(current, edge.wayId, vehicle);
+        
+        if(vehicle == Tag.SpeedType.pedestrian)
+            return (current.directDistanceToGoal / roadSpeed) * roadPriority; 
+        
+        ulong previousWayId = UInt64.MaxValue;
+        if (previous?.edges is not null)
+        {
+            foreach (OsmEdge e in previous.edges)
+                if (e.neighborId.Equals(current.nodeId))
+                {
+                    previousWayId = e.wayId;
+                    break;
+                }
+        }
+
+        double junctionPriority = (current.edges.Count > 2 ? 1 : 0) * junctionFactor;
+        double wayChange = (previousWayId != edge.wayId ? 1 : 0) * wayChangeFactor;
+        
+        if(vehicle == Tag.SpeedType.car)
+            return (current.directDistanceToGoal / roadSpeed) * roadPriority * ((junctionPriority + wayChange) / 2);
+
         return double.MaxValue;
-        return distance / speed;
+    }
+
+    private static double GetPriorityVehicleRoad(OsmEdge edge, Tag.SpeedType vehicle, Region region)
+    {
+        if (vehicle == Tag.SpeedType.any)
+            return 1;
+        WayType? wayType = (WayType?)region.tagManager.GetTag(edge.wayId, Tag.TagType.highway);
+        if(wayType is null)
+            return double.MaxValue;
+        if (vehicle == Tag.SpeedType.car)
+        {
+            switch (wayType)
+            {
+                case WayType.motorway:
+                case WayType.motorway_link:
+                case WayType.motorroad:
+                case WayType.trunk:
+                case WayType.trunk_link:
+                case WayType.primary:
+                case WayType.primary_link:
+                    return 1;
+                case WayType.secondary:
+                case WayType.secondary_link:
+                    return 2;
+                case WayType.tertiary:
+                case WayType.tertiary_link:
+                    return 3;
+                case WayType.unclassified:
+                case WayType.residential:
+                case WayType.road:
+                    return 4;
+                case WayType.living_street:
+                case WayType.service:
+                case WayType.track:
+                    return 5;
+                default:
+                    return 100;
+            }
+        }
+        if (vehicle == Tag.SpeedType.pedestrian)
+        {
+            switch (wayType)
+            {
+                case WayType.pedestrian:
+                case WayType.corridor:
+                case WayType.footway:
+                case WayType.path:
+                case WayType.steps:
+                case WayType.residential: 
+                case WayType.living_street:
+                    return 1;
+                case WayType.service:
+                case WayType.cycleway:
+                case WayType.bridleway:
+                case WayType.road:
+                case WayType.track:
+                case WayType.unclassified:
+                    return 2;
+                case WayType.tertiary:
+                case WayType.tertiary_link:
+                case WayType.escape:
+                    return 5;
+                default:
+                    return 100;
+            }
+        }
+
+        return 100;
+
     }
 
     private static List<PathNode> GetRouteFromCalc(OsmNode goalNode, RegionManager regionManager)

Pathfinding/Pathfinder_Distance.cs

@@ -20,25 +20,25 @@ public static partial class Pathfinder
 
         while (toVisit.Count > 0)
         {
-            OsmNode closestNodeToGoal = toVisit.Dequeue();
+            OsmNode currentNode = toVisit.Dequeue();
 
-            foreach (OsmEdge edge in closestNodeToGoal.edges)
+            foreach (OsmEdge edge in currentNode.edges)
             {
                 OsmNode? neighbor = regionManager.GetNode(edge.neighborId, edge.neighborRegion);
                 if (neighbor is not null)
                 {
-                    double newPotentialLength = closestNodeToGoal.currentPathLength + Utils.DistanceBetween(closestNodeToGoal, neighbor);
+                    if (Math.Abs(neighbor.directDistanceToGoal - double.MaxValue) < 1)
+                        neighbor.directDistanceToGoal = Utils.DistanceBetween(neighbor, goalNode);
+                    double newPotentialLength = currentNode.currentPathLength + Utils.DistanceBetween(currentNode, neighbor);
                     if (newPotentialLength < neighbor.currentPathLength)
                     {
-                        neighbor.previousPathNode = closestNodeToGoal;
+                        neighbor.previousPathNode = currentNode;
                         neighbor.currentPathLength = newPotentialLength;
-                        neighbor.directDistanceToGoal = Utils.DistanceBetween(neighbor, goalNode);
 
                         if(neighbor.Equals(goalNode))
-                        {
-                            stop = true;
-                        }
-                        else if(!stop)
+                            return GetRouteFromCalc(goalNode, regionManager);
+                            //stop = true;
+                        if (!toVisit.UnorderedItems.Any(item => item.Element.Equals(neighbor)) && !stop)
                         {
                             toVisit.Enqueue(neighbor, neighbor.directDistanceToGoal);
                         }

Pathfinding/Pathfinder_Time.cs

@@ -21,31 +21,41 @@ public static partial class Pathfinder
 
         while (toVisit.Count > 0)
         {
-            OsmNode closestNodeToGoal = toVisit.Dequeue();
+            OsmNode currentNode = toVisit.Dequeue();
             
-            foreach (OsmEdge edge in closestNodeToGoal.edges.Where(
-                         edge => regionManager.TestValidConnectionForType(closestNodeToGoal, edge, vehicle)))
+            foreach (OsmEdge edge in currentNode.edges.Where(
+                         edge => regionManager.TestValidConnectionForType(currentNode, edge, vehicle)))
             {
                 OsmNode? neighbor = regionManager.GetNode(edge.neighborId, edge.neighborRegion);
                 if (neighbor is not null)
                 {
-                    double newPotentialWeight = closestNodeToGoal.currentPathWeight +
-                                                EdgeWeight(closestNodeToGoal, edge, vehicle, regionManager);
+                    if (Math.Abs(neighbor.directDistanceToGoal - double.MaxValue) < 1)
+                        neighbor.directDistanceToGoal = Utils.DistanceBetween(neighbor, goalNode);
+                    
+                    double newPotentialWeight = currentNode.currentPathWeight +
+                                                EdgeWeight(currentNode, edge, vehicle, regionManager);
+                    
                     if (newPotentialWeight < neighbor.currentPathWeight)
                     {
-                        neighbor.previousPathNode = closestNodeToGoal;
-                        neighbor.currentPathLength = closestNodeToGoal.currentPathLength + Utils.DistanceBetween(closestNodeToGoal, neighbor);
+                        neighbor.previousPathNode = currentNode;
                         neighbor.currentPathWeight = newPotentialWeight;
-                        neighbor.directDistanceToGoal = Utils.DistanceBetween(neighbor, goalNode);
 
                         if (neighbor.Equals(goalNode))
                         {
-                            stop = true;
-                        }
-                        else if(!stop)
+                            currentNode = neighbor;
+                            currentNode.currentPathLength = 0;
+                            while (currentNode != startAndEndNode.Item1 && currentNode.previousPathNode is not null)
                             {
-                            toVisit.Enqueue(neighbor, neighbor.directDistanceToGoal);
+                                currentNode.previousPathNode.currentPathLength = currentNode.currentPathLength +
+                                    Utils.DistanceBetween(currentNode, currentNode.previousPathNode);
+                                currentNode = currentNode.previousPathNode;
                             }
+                                
+                            return GetRouteFromCalc(goalNode, regionManager);
+                        }
+                            //stop = true;
+                        if (!toVisit.UnorderedItems.Any(item => item.Element.Equals(neighbor)))
+                            toVisit.Enqueue(neighbor, GetPriority(currentNode, currentNode.previousPathNode, edge, vehicle, regionManager));
                     }
                 }
             }

Pathfinding/RegionManager.cs

@@ -76,10 +76,8 @@ namespace Pathfinding
         {
             if (type == Tag.SpeedType.any)
                 return true;
-            double speed = GetSpeedForEdge(node1, edge.wayId, type);
-            if (speed != 0)
-                return true;
-            return false;
+            byte speed = GetSpeedForEdge(node1, edge.wayId, type);
+            return (speed is not 0);
         }
         
         public OsmNode? ClosestNodeToCoordinates(Coordinates coordinates, Tag.SpeedType vehicle)
@@ -97,7 +95,7 @@ namespace Pathfinding
                     hasConnectionUsingVehicle = false;
                     foreach (OsmEdge edge in node.edges)
                     {
-                        double speed = GetSpeedForEdge(node, edge.wayId, vehicle);
+                        byte speed = GetSpeedForEdge(node, edge.wayId, vehicle);
                         if (speed != 0)
                             hasConnectionUsingVehicle = true;
                     }
@@ -114,25 +112,20 @@ namespace Pathfinding
             return closest;
         }
         
-        public double GetSpeedForEdge(OsmNode node1, ulong wayId, Tag.SpeedType vehicle)
+        public byte GetSpeedForEdge(OsmNode node1, ulong wayId, Tag.SpeedType vehicle)
         {
             TagManager tags = GetRegion(node1.coordinates)!.tagManager;
             Tag.WayType wayType = (Tag.WayType)tags.GetTag(wayId, Tag.TagType.highway)!;
+            byte speed = 0;
             switch (vehicle)
             {
                 case Tag.SpeedType.pedestrian:
-                    byte speed = Tag.defaultSpeedPedestrian[wayType];
-                    if (speed is not 0)
-                        return speed;
-                    return 0;
+                    speed = Tag.defaultSpeedPedestrian[wayType];
+                    return speed is not 0 ? speed : (byte)0;
                 case Tag.SpeedType.car: 
                     byte? maxSpeed = (byte?)tags.GetTag(wayId, Tag.TagType.maxspeed);
-                    if (maxSpeed is not null)
-                        return (double)maxSpeed;
-                    maxSpeed = Tag.defaultSpeedCar[wayType];
-                    if(maxSpeed is not 0)
-                        return (byte)maxSpeed;
-                    return 0;
+                    speed = Tag.defaultSpeedCar[wayType];
+                    return maxSpeed < speed ? (byte)maxSpeed : speed;
                 case Tag.SpeedType.any:
                     return 1;
                 default: