diff --git a/src/openrct2-ui/windows/EditorObjectSelection.cpp b/src/openrct2-ui/windows/EditorObjectSelection.cpp
index 276658a14f..ece7111fb9 100644
--- a/src/openrct2-ui/windows/EditorObjectSelection.cpp
+++ b/src/openrct2-ui/windows/EditorObjectSelection.cpp
@@ -464,7 +464,6 @@ static void window_editor_object_selection_close(rct_window *w)
         research_reset_current_item();
         gSilentResearch = false;
     }
-    research_remove_non_separate_vehicle_types();
 
     auto intent = Intent(INTENT_ACTION_REFRESH_NEW_RIDES);
     context_broadcast_intent(&intent);
diff --git a/src/openrct2/Editor.cpp b/src/openrct2/Editor.cpp
index 7fc5712cbc..615cd93576 100644
--- a/src/openrct2/Editor.cpp
+++ b/src/openrct2/Editor.cpp
@@ -333,7 +333,6 @@ namespace Editor
         if (fromSave)
         {
             research_populate_list_random();
-            research_remove_non_separate_vehicle_types();
 
             if (gParkFlags & PARK_FLAGS_NO_MONEY)
             {
diff --git a/src/openrct2/management/Research.cpp b/src/openrct2/management/Research.cpp
index 907fa86080..8bf737f975 100644
--- a/src/openrct2/management/Research.cpp
+++ b/src/openrct2/management/Research.cpp
@@ -447,66 +447,6 @@ void research_reset_current_item()
     gResearchProgress                 = 0;
 }
 
-/**
- *
- *  rct2: 0x0068585B
- */
-void research_remove_non_separate_vehicle_types()
-{
-    rct_research_item * researchItem, * researchItem2;
-
-    researchItem = gResearchItems;
-    while ((researchItem + 1)->rawValue != RESEARCHED_ITEMS_END)
-    {
-        researchItem++;
-    }
-
-    do
-    {
-    loopBeginning:
-        if (
-            researchItem != gResearchItems &&
-            researchItem->rawValue != RESEARCHED_ITEMS_SEPARATOR &&
-            researchItem->rawValue != RESEARCHED_ITEMS_END &&
-            researchItem->type == RESEARCH_ENTRY_TYPE_RIDE)
-        {
-            rct_ride_entry * rideEntry = get_ride_entry(researchItem->entryIndex);
-            if (!(rideEntry->flags & (RIDE_ENTRY_FLAG_SEPARATE_RIDE)))
-            {
-                // Check if ride type already exists further up for a vehicle type that isn't displayed as a ride
-                researchItem2 = researchItem - 1;
-                do
-                {
-                    if (
-                        researchItem2->rawValue != RESEARCHED_ITEMS_SEPARATOR &&
-                        researchItem2->type == RESEARCH_ENTRY_TYPE_RIDE
-                        )
-                    {
-                        rideEntry = get_ride_entry(researchItem2->entryIndex);
-                        if (!(rideEntry->flags & (RIDE_ENTRY_FLAG_SEPARATE_RIDE)))
-                        {
-
-                            if (researchItem->baseRideType == researchItem2->baseRideType)
-                            {
-                                // Remove item
-                                researchItem2 = researchItem;
-                                do
-                                {
-                                    *researchItem2 = *(researchItem2 + 1);
-                                }
-                                while ((researchItem2++)->rawValue != RESEARCHED_ITEMS_END_2);
-                                goto loopBeginning;
-                            }
-                        }
-                    }
-                }
-                while ((researchItem2--) != gResearchItems);
-            }
-        }
-    }
-    while ((researchItem--) != gResearchItems);
-}
-
 /**
  *
  *  rct2: 0x006857FA
diff --git a/src/openrct2/management/Research.h b/src/openrct2/management/Research.h
index cdd804add6..f742ab61ac 100644
--- a/src/openrct2/management/Research.h
+++ b/src/openrct2/management/Research.h
@@ -119,7 +119,6 @@ void research_reset_items();
 void research_update_uncompleted_types();
 void research_update();
 void research_reset_current_item();
-void research_remove_non_separate_vehicle_types();
 void research_populate_list_random();
 void research_populate_list_researched();
 
diff --git a/src/openrct2/rct1/S4Importer.cpp b/src/openrct2/rct1/S4Importer.cpp
index 01ee19a14b..ee5e62b25b 100644
--- a/src/openrct2/rct1/S4Importer.cpp
+++ b/src/openrct2/rct1/S4Importer.cpp
@@ -2021,8 +2021,6 @@ private:
             }
         }
 
-        research_remove_non_separate_vehicle_types();
-
         // Research funding / priority
         uint8 activeResearchTypes = 0;
         if (_s4.research_priority & RCT1_RESEARCH_CATEGORY_ROLLERCOASTERS)