diff --git a/OpenRA.Mods.Common/Traits/Buildings/Bridge.cs b/OpenRA.Mods.Common/Traits/Buildings/Bridge.cs
index 97c447a7bf..6710563d21 100644
--- a/OpenRA.Mods.Common/Traits/Buildings/Bridge.cs
+++ b/OpenRA.Mods.Common/Traits/Buildings/Bridge.cs
@@ -22,7 +22,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Traits
 {
-	class BridgeInfo : TraitInfo, IRulesetLoaded, Requires<HealthInfo>, Requires<BuildingInfo>
+	public class BridgeInfo : TraitInfo, IRulesetLoaded, Requires<HealthInfo>, Requires<BuildingInfo>
 	{
 		public readonly bool Long = false;
 
@@ -93,7 +93,7 @@ namespace OpenRA.Mods.Common.Traits
 		}
 	}
 
-	class Bridge : IRender, INotifyDamageStateChanged, IRadarSignature
+	public class Bridge : IRender, INotifyDamageStateChanged, IRadarSignature
 	{
 		readonly BuildingInfo buildingInfo;
 		readonly Bridge[] neighbours = new Bridge[2];
diff --git a/OpenRA.Mods.Common/Traits/Buildings/BridgeHut.cs b/OpenRA.Mods.Common/Traits/Buildings/BridgeHut.cs
index 21bd33d58a..300b2c3ff7 100644
--- a/OpenRA.Mods.Common/Traits/Buildings/BridgeHut.cs
+++ b/OpenRA.Mods.Common/Traits/Buildings/BridgeHut.cs
@@ -19,7 +19,7 @@ using OpenRA.Traits;
 namespace OpenRA.Mods.Common.Traits
 {
 	[Desc("Allows bridges to be targeted for demolition and repair.")]
-	class BridgeHutInfo : TraitInfo, IDemolishableInfo
+	public class BridgeHutInfo : TraitInfo, IDemolishableInfo
 	{
 		[Desc("Bridge types to act on")]
 		public readonly string[] Types = { "GroundLevelBridge" };
@@ -41,7 +41,7 @@ namespace OpenRA.Mods.Common.Traits
 		public override object Create(ActorInitializer init) { return new BridgeHut(init.World, this); }
 	}
 
-	class BridgeHut : INotifyCreated, IDemolishable, ITick
+	public class BridgeHut : INotifyCreated, IDemolishable, ITick
 	{
 		public readonly BridgeHutInfo Info;
 		readonly BridgeLayer bridgeLayer;
diff --git a/OpenRA.Mods.Common/Traits/Buildings/LegacyBridgeHut.cs b/OpenRA.Mods.Common/Traits/Buildings/LegacyBridgeHut.cs
index 28d3ae0f6b..872189b355 100644
--- a/OpenRA.Mods.Common/Traits/Buildings/LegacyBridgeHut.cs
+++ b/OpenRA.Mods.Common/Traits/Buildings/LegacyBridgeHut.cs
@@ -17,14 +17,14 @@ using OpenRA.Traits;
 namespace OpenRA.Mods.Common.Traits
 {
 	[Desc("Allows bridges to be targeted for demolition and repair.")]
-	class LegacyBridgeHutInfo : TraitInfo, IDemolishableInfo
+	public class LegacyBridgeHutInfo : TraitInfo, IDemolishableInfo
 	{
 		public bool IsValidTarget(ActorInfo actorInfo, Actor saboteur) { return false; } // TODO: bridges don't support frozen under fog
 
 		public override object Create(ActorInitializer init) { return new LegacyBridgeHut(init); }
 	}
 
-	class LegacyBridgeHut : IDemolishable
+	public class LegacyBridgeHut : IDemolishable
 	{
 		public Bridge FirstBridge { get; private set; }
 		public Bridge Bridge { get; private set; }
diff --git a/OpenRA.Mods.Common/Traits/EngineerRepair.cs b/OpenRA.Mods.Common/Traits/EngineerRepair.cs
index 6cc8e871da..3b00cad855 100644
--- a/OpenRA.Mods.Common/Traits/EngineerRepair.cs
+++ b/OpenRA.Mods.Common/Traits/EngineerRepair.cs
@@ -18,7 +18,7 @@ using OpenRA.Traits;
 namespace OpenRA.Mods.Common.Traits
 {
 	[Desc("Can instantly repair other actors, but gets consumed afterwards.")]
-	class EngineerRepairInfo : ConditionalTraitInfo
+	public class EngineerRepairInfo : ConditionalTraitInfo
 	{
 		[Desc("Uses the \"EngineerRepairable\" trait to determine repairability.")]
 		public readonly BitSet<EngineerRepairType> Types = default(BitSet<EngineerRepairType>);
@@ -50,7 +50,7 @@ namespace OpenRA.Mods.Common.Traits
 		public override object Create(ActorInitializer init) { return new EngineerRepair(this); }
 	}
 
-	class EngineerRepair : ConditionalTrait<EngineerRepairInfo>, IIssueOrder, IResolveOrder, IOrderVoice
+	public class EngineerRepair : ConditionalTrait<EngineerRepairInfo>, IIssueOrder, IResolveOrder, IOrderVoice
 	{
 		public EngineerRepair(EngineerRepairInfo info)
 			: base(info) { }
diff --git a/OpenRA.Mods.Common/Traits/EngineerRepairable.cs b/OpenRA.Mods.Common/Traits/EngineerRepairable.cs
index a42f5aacd2..bfc70cad76 100644
--- a/OpenRA.Mods.Common/Traits/EngineerRepairable.cs
+++ b/OpenRA.Mods.Common/Traits/EngineerRepairable.cs
@@ -16,7 +16,7 @@ namespace OpenRA.Mods.Common.Traits
 	public class EngineerRepairType { }
 
 	[Desc("Eligible for instant repair.")]
-	class EngineerRepairableInfo : ConditionalTraitInfo
+	public class EngineerRepairableInfo : ConditionalTraitInfo
 	{
 		[Desc("Actors with these Types under EngineerRepair trait can repair me.")]
 		public readonly BitSet<EngineerRepairType> Types = default(BitSet<EngineerRepairType>);
@@ -24,7 +24,7 @@ namespace OpenRA.Mods.Common.Traits
 		public override object Create(ActorInitializer init) { return new EngineerRepairable(this); }
 	}
 
-	class EngineerRepairable : ConditionalTrait<EngineerRepairableInfo>
+	public class EngineerRepairable : ConditionalTrait<EngineerRepairableInfo>
 	{
 		public EngineerRepairable(EngineerRepairableInfo info)
 			: base(info) { }
diff --git a/OpenRA.Mods.Common/Traits/RepairsBridges.cs b/OpenRA.Mods.Common/Traits/RepairsBridges.cs
index bedd46a853..8f092fb47b 100644
--- a/OpenRA.Mods.Common/Traits/RepairsBridges.cs
+++ b/OpenRA.Mods.Common/Traits/RepairsBridges.cs
@@ -18,7 +18,7 @@ using OpenRA.Traits;
 namespace OpenRA.Mods.Common.Traits
 {
 	[Desc("Can enter a BridgeHut or LegacyBridgeHut to trigger a repair.")]
-	class RepairsBridgesInfo : TraitInfo
+	public class RepairsBridgesInfo : TraitInfo
 	{
 		[VoiceReference]
 		public readonly string Voice = "Action";
@@ -48,7 +48,7 @@ namespace OpenRA.Mods.Common.Traits
 		public override object Create(ActorInitializer init) { return new RepairsBridges(this); }
 	}
 
-	class RepairsBridges : IIssueOrder, IResolveOrder, IOrderVoice
+	public class RepairsBridges : IIssueOrder, IResolveOrder, IOrderVoice
 	{
 		readonly RepairsBridgesInfo info;
 
diff --git a/OpenRA.Mods.Common/Traits/World/LegacyBridgeLayer.cs b/OpenRA.Mods.Common/Traits/World/LegacyBridgeLayer.cs
index fb5749e2a2..7d7e562daf 100644
--- a/OpenRA.Mods.Common/Traits/World/LegacyBridgeLayer.cs
+++ b/OpenRA.Mods.Common/Traits/World/LegacyBridgeLayer.cs
@@ -20,7 +20,7 @@ using OpenRA.Traits;
 namespace OpenRA.Mods.Common.Traits
 {
 	[TraitLocation(SystemActors.World)]
-	class LegacyBridgeLayerInfo : TraitInfo
+	public class LegacyBridgeLayerInfo : TraitInfo
 	{
 		[ActorReference]
 		public readonly string[] Bridges = { "bridge1", "bridge2" };
@@ -28,7 +28,7 @@ namespace OpenRA.Mods.Common.Traits
 		public override object Create(ActorInitializer init) { return new LegacyBridgeLayer(init.Self, this); }
 	}
 
-	class LegacyBridgeLayer : IWorldLoaded
+	public class LegacyBridgeLayer : IWorldLoaded
 	{
 		readonly LegacyBridgeLayerInfo info;
 		readonly Dictionary<ushort, (string Template, int Health)> bridgeTypes = new Dictionary<ushort, (string, int)>();