Multiplicative stairs and turn reluctance

application/src/ext-test/java/org/opentripplanner/ext/flex/FlexIntegrationTest.java

@@ -164,7 +164,7 @@ void flexDirect() {
     // walk, flex
     assertEquals(2, itin.legs().size());
     assertEquals("2021-12-02T12:52:54-05:00[America/New_York]", itin.startTime().toString());
-    assertEquals(3203, itin.generalizedCost());
+    assertEquals(3253, itin.generalizedCost());
 
     var walkToFlex = itin.streetLeg(0);
     assertEquals(WALK, walkToFlex.getMode());

application/src/main/java/org/opentripplanner/apis/transmodel/model/DefaultRouteRequestType.java

@@ -117,7 +117,9 @@ private GraphQLObjectType createGraphQLType() {
       .field(
         GraphQLFieldDefinition.newFieldDefinition()
           .name("stairsReluctance")
-          .description("Used instead of walkReluctance for stairs.")
+          .description(
+            "A multiplier to specify how bad walking on stairs is, compared to walking on flat ground."
+          )
           .type(Scalars.GraphQLFloat)
           .dataFetcher(env -> preferences.walk().stairsReluctance())
           .build()

application/src/main/java/org/opentripplanner/routing/api/request/preference/VehicleWalkingPreferences.java

@@ -28,8 +28,8 @@ private VehicleWalkingPreferences() {
     this.reluctance = 5.0;
     this.mountDismountTime = Duration.ZERO;
     this.mountDismountCost = Cost.ZERO;
-    // very high reluctance to carry the bike up/down a flight of stairs
-    this.stairsReluctance = 10;
+    // multiplicative factor to carry the bike up/down a flight of stairs on top of the walk reluctance
+    this.stairsReluctance = 2;
   }
 
   /**
@@ -82,7 +82,7 @@ public Cost mountDismountCost() {
     return mountDismountCost;
   }
 
-  /** Reluctance of walking carrying a vehicle up a flight of stairs. */
+  /** Reluctance of carrying a vehicle up a flight of stairs on top of walking the vehicle. */
   public double stairsReluctance() {
     return stairsReluctance;
   }

application/src/main/java/org/opentripplanner/routing/api/request/preference/WalkPreferences.java

@@ -92,7 +92,10 @@ public int boardCost() {
     return boardCost.toSeconds();
   }
 
-  /** Used instead of walk reluctance for stairs */
+  /**
+   * Used on top of {@link #reluctance()} for stairs. If the value is set to 1, walking on stairs is
+   * treated the same as walking on flat ground.
+   */
   public double stairsReluctance() {
     return stairsReluctance;
   }

application/src/main/java/org/opentripplanner/standalone/config/routerequest/RouteRequestConfig.java

@@ -841,7 +841,9 @@ private static void mapWalkPreferences(NodeAdapter root, WalkPreferences.Builder
         c
           .of("stairsReluctance")
           .since(V2_0)
-          .summary("Used instead of walkReluctance for stairs.")
+          .summary(
+            "A multiplier to specify how bad walking on stairs is, on top of the reluctance parameter."
+          )
           .asDouble(dft.stairsReluctance())
       )
       .withStairsTimeFactor(

application/src/main/java/org/opentripplanner/standalone/config/routerequest/VehicleWalkingConfig.java

@@ -74,7 +74,7 @@ private static void mapVehicleWalkingPreferences(
           .of("stairsReluctance")
           .since(V2_3)
           .summary(
-            "How bad is it to walk the vehicle up/down a flight of stairs compared to taking a detour."
+            "How bad is it to walk the vehicle up/down a flight of stairs, on top of the reluctance parameter."
           )
           .asDouble(dft.stairsReluctance())
       );

application/src/main/java/org/opentripplanner/street/model/edge/StreetEdge.java

@@ -1021,14 +1021,16 @@ private StateEditor doTraverse(State s0, TraverseMode traverseMode, boolean walk
        * that during reverse traversal, we must also use the speed for the mode of
        * the backEdge, rather than of the current edge.
        */
+      var intersectionMode = arriveBy ? backMode : traverseMode;
+      boolean walkingBikeThroughIntersection = arriveBy ? s0.isBackWalkingBike() : walkingBike;
       if (arriveBy && tov instanceof IntersectionVertex traversedVertex) { // arrive-by search
         turnDuration = s0
           .intersectionTraversalCalculator()
           .computeTraversalDuration(
             traversedVertex,
             this,
             backPSE,
-            backMode,
+            intersectionMode,
             (float) speed,
             (float) backSpeed
           );
@@ -1039,7 +1041,7 @@ private StateEditor doTraverse(State s0, TraverseMode traverseMode, boolean walk
             traversedVertex,
             backPSE,
             this,
-            traverseMode,
+            intersectionMode,
             (float) backSpeed,
             (float) speed
           );
@@ -1049,8 +1051,18 @@ private StateEditor doTraverse(State s0, TraverseMode traverseMode, boolean walk
         turnDuration = 0;
       }
 
+      var modeReluctance =
+        switch (intersectionMode) {
+          case WALK -> walkingBikeThroughIntersection
+            ? preferences.bike().walking().reluctance()
+            : preferences.walk().reluctance();
+          case BICYCLE -> preferences.bike().reluctance();
+          case SCOOTER -> preferences.scooter().reluctance();
+          case CAR -> preferences.car().reluctance();
+          case FLEX -> 1;
+        };
       time_ms += (long) Math.ceil(1000.0 * turnDuration);
-      weight += preferences.street().turnReluctance() * turnDuration;
+      weight += preferences.street().turnReluctance() * modeReluctance * turnDuration;
     }
 
     if (!traverseMode.isInCar()) {
@@ -1152,10 +1164,6 @@ private TraversalCosts walkingTraversalCosts(
       if (walkingBike) {
         // take slopes into account when walking bikes
         time = weight = (getEffectiveBikeDistance() / speed);
-        if (isStairs()) {
-          // we do allow walking the bike across a stairs but there is a very high default penalty
-          weight *= preferences.bike().walking().stairsReluctance();
-        }
       } else {
         // take slopes into account when walking
         time = getEffectiveWalkDistance() / speed;

application/src/main/java/org/opentripplanner/street/model/edge/StreetEdgeReluctanceCalculator.java

@@ -1,6 +1,8 @@
 package org.opentripplanner.street.model.edge;
 
 import org.opentripplanner.routing.api.request.preference.RoutingPreferences;
+import org.opentripplanner.routing.api.request.preference.VehicleWalkingPreferences;
+import org.opentripplanner.routing.api.request.preference.WalkPreferences;
 import org.opentripplanner.street.search.TraverseMode;
 
 class StreetEdgeReluctanceCalculator {
@@ -18,19 +20,28 @@ static double computeReluctance(
     boolean walkingBike,
     boolean edgeIsStairs
   ) {
-    if (edgeIsStairs) {
-      return pref.walk().stairsReluctance();
-    } else {
-      return switch (traverseMode) {
-        case WALK -> walkingBike ? pref.bike().walking().reluctance() : pref.walk().reluctance();
-        case BICYCLE -> pref.bike().reluctance();
-        case CAR -> pref.car().reluctance();
-        case SCOOTER -> pref.scooter().reluctance();
-        default -> throw new IllegalArgumentException(
-          "getReluctance(): Invalid mode " + traverseMode
-        );
-      };
-    }
+    return switch (traverseMode) {
+      case WALK -> walkingBike
+        ? computeBikeWalkingReluctance(pref.bike().walking(), edgeIsStairs)
+        : computeWalkReluctance(pref.walk(), edgeIsStairs);
+      case BICYCLE -> pref.bike().reluctance();
+      case CAR -> pref.car().reluctance();
+      case SCOOTER -> pref.scooter().reluctance();
+      default -> throw new IllegalArgumentException(
+        "getReluctance(): Invalid mode " + traverseMode
+      );
+    };
+  }
+
+  private static double computeWalkReluctance(WalkPreferences pref, boolean edgeIsStairs) {
+    return pref.reluctance() * (edgeIsStairs ? pref.stairsReluctance() : 1);
+  }
+
+  private static double computeBikeWalkingReluctance(
+    VehicleWalkingPreferences pref,
+    boolean edgeIsStairs
+  ) {
+    return pref.reluctance() * (edgeIsStairs ? pref.stairsReluctance() : 1);
   }
 
   static double computeWheelchairReluctance(

application/src/main/resources/org/opentripplanner/apis/transmodel/schema.graphql

@@ -1109,7 +1109,7 @@ type RoutingParameters {
   reverseOptimizeOnTheFly: Boolean @deprecated(reason : "NOT IN USE IN OTP2.")
   "Whether the planner should return intermediate stops lists for transit legs."
   showIntermediateStops: Boolean @deprecated(reason : "This parameter is always enabled")
-  "Used instead of walkReluctance for stairs."
+  "A multiplier to specify how bad walking on stairs is, compared to walking on flat ground."
   stairsReluctance: Float
   "An extra penalty added on transfers (i.e. all boardings except the first one)."
   transferPenalty: Int