diff --git a/protos/stationLayoutGraphics.proto b/protos/stationLayoutGraphics.proto
index 36d6329..9907632 100644
--- a/protos/stationLayoutGraphics.proto
+++ b/protos/stationLayoutGraphics.proto
@@ -306,6 +306,12 @@ message Section {
     TurnoutPhysical = 2;
   }
 
+  enum RunningDirection {
+    A = 0;
+    B = 1;
+    C = 2;
+  }
+
   CommonInfo common = 1;
   string code = 2;           // 编号
   repeated Point points = 3; // 点列表
@@ -318,6 +324,8 @@ message Section {
   bool isCurve = 10;                 // 是否曲线
   int32 segmentsCount = 12;          // 曲线分段数
   repeated string centralizedStations = 13; // 集中站Id列表
+  RunningDirection normalRunningDirection = 14; //常规运行方向
+  bool isTurnBackZone = 15; // 是否为折返区域
 }
 
 //关联设备