diff --git a/src/script/api/script_bridge.cpp b/src/script/api/script_bridge.cpp
index b0fda24128..5060eec68c 100644
--- a/src/script/api/script_bridge.cpp
+++ b/src/script/api/script_bridge.cpp
@@ -132,32 +132,34 @@ static void _DoCommandReturnBuildBridge1(class ScriptInstance *instance)
 	return GetString(vehicle_type == ScriptVehicle::VT_WATER ? STR_LAI_BRIDGE_DESCRIPTION_AQUEDUCT : ::GetBridgeSpec(bridge_id)->transport_name[vehicle_type]);
 }
 
-/* static */ int32 ScriptBridge::GetMaxSpeed(BridgeID bridge_id)
+/* static */ SQInteger ScriptBridge::GetMaxSpeed(BridgeID bridge_id)
 {
 	if (!IsValidBridge(bridge_id)) return -1;
 
 	return ::GetBridgeSpec(bridge_id)->speed; // km-ish/h
 }
 
-/* static */ Money ScriptBridge::GetPrice(BridgeID bridge_id, uint length)
+/* static */ Money ScriptBridge::GetPrice(BridgeID bridge_id, SQInteger length)
 {
 	if (!IsValidBridge(bridge_id)) return -1;
 
+	length = Clamp<SQInteger>(length, 0, INT32_MAX);
+
 	return ::CalcBridgeLenCostFactor(length) * _price[PR_BUILD_BRIDGE] * ::GetBridgeSpec(bridge_id)->price >> 8;
 }
 
-/* static */ int32 ScriptBridge::GetMaxLength(BridgeID bridge_id)
+/* static */ SQInteger ScriptBridge::GetMaxLength(BridgeID bridge_id)
 {
 	if (!IsValidBridge(bridge_id)) return -1;
 
-	return std::min(::GetBridgeSpec(bridge_id)->max_length, _settings_game.construction.max_bridge_length) + 2;
+	return std::min<SQInteger>(::GetBridgeSpec(bridge_id)->max_length, _settings_game.construction.max_bridge_length) + 2;
 }
 
-/* static */ int32 ScriptBridge::GetMinLength(BridgeID bridge_id)
+/* static */ SQInteger ScriptBridge::GetMinLength(BridgeID bridge_id)
 {
 	if (!IsValidBridge(bridge_id)) return -1;
 
-	return ::GetBridgeSpec(bridge_id)->min_length + 2;
+	return static_cast<SQInteger>(::GetBridgeSpec(bridge_id)->min_length) + 2;
 }
 
 /* static */ TileIndex ScriptBridge::GetOtherBridgeEnd(TileIndex tile)
diff --git a/src/script/api/script_bridge.hpp b/src/script/api/script_bridge.hpp
index 26d7e11619..46b9c57552 100644
--- a/src/script/api/script_bridge.hpp
+++ b/src/script/api/script_bridge.hpp
@@ -80,16 +80,17 @@ public:
 	 *       This is mph / 1.6, which is roughly km/h.
 	 *       To get km/h multiply this number by 1.00584.
 	 */
-	static int32 GetMaxSpeed(BridgeID bridge_id);
+	static SQInteger GetMaxSpeed(BridgeID bridge_id);
 
 	/**
 	 * Get the new cost of a bridge, excluding the road and/or rail.
 	 * @param bridge_id The bridge to get the new cost of.
 	 * @param length The length of the bridge.
+	 *               The value will be clamped to 0 .. MAX(int32).
 	 * @pre IsValidBridge(bridge_id).
 	 * @return The new cost the bridge has.
 	 */
-	static Money GetPrice(BridgeID bridge_id, uint length);
+	static Money GetPrice(BridgeID bridge_id, SQInteger length);
 
 	/**
 	 * Get the maximum length of a bridge.
@@ -97,7 +98,7 @@ public:
 	 * @pre IsValidBridge(bridge_id).
 	 * @returns The maximum length the bridge has.
 	 */
-	static int32 GetMaxLength(BridgeID bridge_id);
+	static SQInteger GetMaxLength(BridgeID bridge_id);
 
 	/**
 	 * Get the minimum length of a bridge.
@@ -105,7 +106,7 @@ public:
 	 * @pre IsValidBridge(bridge_id).
 	 * @returns The minimum length the bridge has.
 	 */
-	static int32 GetMinLength(BridgeID bridge_id);
+	static SQInteger GetMinLength(BridgeID bridge_id);
 
 	/**
 	 * Internal function to help BuildBridge in case of road.