handle combined turns at segregated roads

include/engine/api/route_api.hpp

@@ -132,6 +132,7 @@ class RouteAPI : public BaseAPI
 
                 guidance::trimShortSegments(steps, leg_geometry);
                 leg.steps = guidance::postProcess(std::move(steps));
+                leg.steps = guidance::collapseTurns(std::move(leg.steps));
                 leg.steps = guidance::assignRelativeLocations(std::move(leg.steps), leg_geometry,
                                                               phantoms.source_phantom,
                                                               phantoms.target_phantom);