diff --git a/libraries/mogo-adas-data/src/main/proto/traffic_light.proto b/libraries/mogo-adas-data/src/main/proto/traffic_light.proto
index fcfbf3722e..b557af6397 100644
--- a/libraries/mogo-adas-data/src/main/proto/traffic_light.proto
+++ b/libraries/mogo-adas-data/src/main/proto/traffic_light.proto
@@ -5,10 +5,10 @@ import "header.proto";
 
 enum LightType {
   TYPE_DEFAULT = 0;
-  TYPE_VEHICLE = 1;
-  TYPE_BICYLE = 2;
-  TYPE_PEDSTRIAN = 3;
-  TYPE_LANE = 5;
+  TYPE_VEHICLE = 1;//机动车道
+  TYPE_BICYLE = 2;//自行车道
+  TYPE_PEDSTRIAN = 3;//行人道
+  TYPE_LANE = 5;//车道
 }
 
 enum LightState {
@@ -16,21 +16,22 @@ enum LightState {
   STATE_RED = 1;
   STATE_YELLOW = 2;
   STATE_GREEN = 3;
-  STATE_FLASH = 4;
+  STATE_FLASH = 4;//闪烁
 }
 
 message TrafficLight {
   optional int64 id = 1;
-  optional LightType type = 2 [default = TYPE_DEFAULT];
-  optional LightState state = 3 [default = STATE_OFF];
+  optional LightType type = 2 [default = TYPE_DEFAULT];//灯所处的车道类型
+  optional LightState state = 3 [default = STATE_OFF];//灯态
   optional float duration = 4; // seconds since the last state changed
 }
 
+//触发方式：120m以内会有信号，但远的时候可能不准，越近越准
 message TrafficLights {
   optional common.Header header = 1;
 
-  optional TrafficLight straight = 2;
-  optional TrafficLight left = 3;
-  optional TrafficLight right = 4;
-  optional TrafficLight u_turn = 5;
+  optional TrafficLight straight = 2;//直行灯
+  optional TrafficLight left = 3;//左转灯
+  optional TrafficLight right = 4;//右转灯
+  optional TrafficLight u_turn = 5;//掉头灯
 }
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