Don't collapse segregated intersections at roundabout exits, #5114

CHANGELOG.md

@@ -1,4 +1,9 @@
 # UNRELEASED
+  - Changes from 5.18.0:
+    - Bugfixes:
+      - FIXED: collapsing of ExitRoundabout instructions [#5114](https://github.com/Project-OSRM/osrm-backend/issues/5114)
+
+# 5.18.0
   - Changes from 5.17.0:
     - Features:
       - ADDED: `table` plugin now optionally returns `distance` matrix as part of response [#4990](https://github.com/Project-OSRM/osrm-backend/pull/4990)

src/engine/guidance/collapse_turns.cpp

@@ -621,6 +621,7 @@ RouteSteps collapseSegregatedTurnInstructions(RouteSteps steps)
         // else if the current step is segregated and the next step is not segregated
         // and the next step is not a roundabout then combine with turn adjustment
         else if (curr_step->is_segregated && !next_step->is_segregated &&
+                 !hasRoundaboutType(curr_step->maneuver.instruction) &&
                  !hasRoundaboutType(next_step->maneuver.instruction))
         {
             // Determine if u-turn