diff --git a/advtrains_train_jre231_mod/init.lua b/advtrains_train_jre231_mod/init.lua
new file mode 100644
index 0000000..aaf2bc1
--- /dev/null
+++ b/advtrains_train_jre231_mod/init.lua
@@ -0,0 +1,13 @@
+-- twi_mods/advtrains_train_jre231_mod/init.lua
+-- Modify advtrains_train_jre231
+-- Copyright (C) 2024  1F616EMO
+-- SPDX-License-Identifier: AGPL-3.0-or-later
+
+for _, name in ipairs({
+    "KuHa_E231",
+    "MoHa_E231",
+    "SaHa_E231",
+    "MoHa_E230",
+}) do
+    advtrains.wagon_prototypes["advtrains:" .. name].max_speed = 35
+end
diff --git a/advtrains_train_jre231_mod/mod.conf b/advtrains_train_jre231_mod/mod.conf
new file mode 100644
index 0000000..f4aba1b
--- /dev/null
+++ b/advtrains_train_jre231_mod/mod.conf
@@ -0,0 +1,2 @@
+name = advtrains_train_jre231_mod
+depends = advtrains_train_jre231, advtrains