diff --git a/src/openrct2/object/RideObject.cpp b/src/openrct2/object/RideObject.cpp
index 4450e358e8..e1b8a2b7f7 100644
--- a/src/openrct2/object/RideObject.cpp
+++ b/src/openrct2/object/RideObject.cpp
@@ -737,37 +737,7 @@ CarEntry RideObject::ReadJsonCar([[maybe_unused]] IReadObjectContext* context, j
             { "isGoKart", CAR_ENTRY_FLAG_GO_KART },
             { "useDodgemCarPlacement", CAR_ENTRY_FLAG_DODGEM_CAR_PLACEMENT },
 
-            // Obsolete flags that have been replaced with named and camelCased values, but kept for now for backward
-            // compatibility.
-            { "VEHICLE_ENTRY_FLAG_POWERED_RIDE_UNRESTRICTED_GRAVITY", CAR_ENTRY_FLAG_POWERED_RIDE_UNRESTRICTED_GRAVITY },
-            { "VEHICLE_ENTRY_FLAG_NO_UPSTOP_WHEELS", CAR_ENTRY_FLAG_NO_UPSTOP_WHEELS },
-            { "VEHICLE_ENTRY_FLAG_NO_UPSTOP_BOBSLEIGH", CAR_ENTRY_FLAG_NO_UPSTOP_BOBSLEIGH },
-            { "VEHICLE_ENTRY_FLAG_MINI_GOLF", CAR_ENTRY_FLAG_MINI_GOLF },
-            { "VEHICLE_ENTRY_FLAG_4", CAR_ENTRY_FLAG_REVERSER_BOGIE },
-            { "VEHICLE_ENTRY_FLAG_5", CAR_ENTRY_FLAG_REVERSER_PASSENGER_CAR },
-            { "VEHICLE_ENTRY_FLAG_HAS_INVERTED_SPRITE_SET", CAR_ENTRY_FLAG_HAS_INVERTED_SPRITE_SET },
-            { "VEHICLE_ENTRY_FLAG_DODGEM_INUSE_LIGHTS", CAR_ENTRY_FLAG_DODGEM_INUSE_LIGHTS },
-            { "VEHICLE_ENTRY_FLAG_ENABLE_ADDITIONAL_COLOUR_2", CAR_ENTRY_FLAG_ENABLE_TERNARY_COLOUR },
-            { "VEHICLE_ENTRY_FLAG_10", CAR_ENTRY_FLAG_RECALCULATE_SPRITE_BOUNDS },
-            { "VEHICLE_ENTRY_FLAG_OVERRIDE_NUM_VERTICAL_FRAMES", CAR_ENTRY_FLAG_OVERRIDE_NUM_VERTICAL_FRAMES },
-            { "VEHICLE_ENTRY_FLAG_13", CAR_ENTRY_FLAG_SPRITE_BOUNDS_INCLUDE_INVERTED_SET },
-            { "VEHICLE_ENTRY_FLAG_SPINNING_ADDITIONAL_FRAMES", CAR_ENTRY_FLAG_SPINNING_ADDITIONAL_FRAMES },
-            { "VEHICLE_ENTRY_FLAG_LIFT", CAR_ENTRY_FLAG_LIFT },
-            { "VEHICLE_ENTRY_FLAG_ENABLE_ADDITIONAL_COLOUR_1", CAR_ENTRY_FLAG_ENABLE_TRIM_COLOUR },
-            { "VEHICLE_ENTRY_FLAG_SWINGING", CAR_ENTRY_FLAG_SWINGING },
-            { "VEHICLE_ENTRY_FLAG_SPINNING", CAR_ENTRY_FLAG_SPINNING },
-            { "VEHICLE_ENTRY_FLAG_POWERED", CAR_ENTRY_FLAG_POWERED },
-            { "VEHICLE_ENTRY_FLAG_RIDERS_SCREAM", CAR_ENTRY_FLAG_RIDERS_SCREAM },
-            { "VEHICLE_ENTRY_FLAG_21", CAR_ENTRY_FLAG_SUSPENDED_SWING },
-            { "VEHICLE_ENTRY_FLAG_BOAT_HIRE_COLLISION_DETECTION", CAR_ENTRY_FLAG_BOAT_HIRE_COLLISION_DETECTION },
-            { "VEHICLE_ENTRY_FLAG_VEHICLE_ANIMATION", CAR_ENTRY_FLAG_VEHICLE_ANIMATION },
-            { "VEHICLE_ENTRY_FLAG_RIDER_ANIMATION", CAR_ENTRY_FLAG_RIDER_ANIMATION },
-            { "VEHICLE_ENTRY_FLAG_25", CAR_ENTRY_FLAG_WOODEN_WILD_MOUSE_SWING },
-            { "VEHICLE_ENTRY_FLAG_SLIDE_SWING", CAR_ENTRY_FLAG_SLIDE_SWING },
-            { "VEHICLE_ENTRY_FLAG_CHAIRLIFT", CAR_ENTRY_FLAG_CHAIRLIFT },
-            { "VEHICLE_ENTRY_FLAG_WATER_RIDE", CAR_ENTRY_FLAG_WATER_RIDE },
-            { "VEHICLE_ENTRY_FLAG_GO_KART", CAR_ENTRY_FLAG_GO_KART },
-            { "VEHICLE_ENTRY_FLAG_DODGEM_CAR_PLACEMENT", CAR_ENTRY_FLAG_DODGEM_CAR_PLACEMENT },
+            // Obsolete flag, only used on Boat Hire. Remaining usages have not yet been updated as of 2022-07-11.
             { "VEHICLE_ENTRY_FLAG_11", CAR_ENTRY_FLAG_USE_16_ROTATION_FRAMES },
         });