diff --git a/include/bus.h b/include/bus.h
index 6992575..ac158f0 100644
--- a/include/bus.h
+++ b/include/bus.h
@@ -21,6 +21,11 @@ struct bus {
  */
 typedef struct bus bus_t;
 
+/**
+ * 全局的公交车变量
+ */
+extern bus_t the_bus;
+
 /**
  * 每个时刻使公交车前进
  * @param rails 轨道链表
@@ -28,6 +33,6 @@ typedef struct bus bus_t;
  * @param bus 公交车
  * @return 公交车是否到达站点
  */
-int RunBus(rail_node_t* rails, bus_t bus, int direction);
+int RunBus(int direction);
 
 #endif //AUTO_PILOT_BUS_BUS_H
diff --git a/include/controller.h b/include/controller.h
index 569005d..2e9a0d4 100644
--- a/include/controller.h
+++ b/include/controller.h
@@ -10,66 +10,20 @@
 #include "query.h"
 #include "bus.h"
 
-/**
- * 全局的时间计数器
- */
-extern int BUS_TIME;
-
 /**
  * 当前正在处理的请求
  */
 extern bus_query_t *target_query;
 
-/**
- * 时间增加
- */
-void AddTime();
-
 /**
  * 在先来先服务策略下应该前进的方向
- * @param bus 公交车
- * @param queries 请求队列链表
  * @return 前进的方向
  */
-int FCFSDirection(bus_t bus, bus_query_t queries);
+int FCFSDirection();
 
 /**
  * 在先来先服务策略下给出处理的请求
- * @param bus 公交车
- * @param queries 请求队列链表
  * @return 需要处理的请求
  */
-bus_query_t FCFSQuery(bus_t bus, bus_query_t queries);
-
-/**
- * 在最短寻找时间策略下应该前进的方向
- * @param bus 公交车
- * @param queries 请求队列链表
- * @return 前进的方向
- */
-int SSTFDirection(bus_t bus, bus_query_t queries);
-
-/**
- * 在最短寻找时间策略给出处理的请求
- * @param bus 公交车
- * @param queries 请求队列链表
- * @return 需要处理的请求
- */
-bus_query_t SSTFQuery(bus_t bus, bus_query_t queries);
-
-/**
- * 顺便服务的前进方向
- * @param bus 公交车
- * @param queries 请求队列链表
- * @return 前进的方向
- */
-int SCANDirection(bus_t bus, bus_query_t queries);
-
-/**
- * 顺便服务的策略处理
- * @param bus 公交车
- * @param queries 请求队列链表
- * @return 需要处理的请求
- */
-bus_query_t SCANQuery(bus_t bus, bus_query_t queries);
+bus_query_t FCFSQuery();
 #endif //AUTO_PILOT_BUS_CONTROLLER_H
diff --git a/include/query.h b/include/query.h
index 951d0bd..af2ee14 100644
--- a/include/query.h
+++ b/include/query.h
@@ -19,30 +19,37 @@ struct bus_query {
     /**
      * 请求产生/指向的站点
      */
-    rail_node_t node;
+    rail_node_t *node;
+    /**
+     * 指向下一个请求的指针
+     */
+    struct bus_query *next_node;
 };
 
 typedef struct bus_query bus_query_t;
 
 /**
- * 创建请求
- * @param query 请求链表队列
+ * 全局的请求链表头节点
+ */
+extern bus_query_t *queries;
+
+/**
+ * 创建请求链表节点
  * @param type 请求的类型
  * @param node 请求产生/指向的站点
  */
-void CreateQuery(bus_query_t query, int type, rail_node_t node);
+bus_query_t *CreateQuery(int type, rail_node_t *node);
 
 /**
  * 删除请求
- * @param query 请求链表队列
  * @param target_query 需要删除的请求
  */
-void DeleteQuery(bus_query_t query, bus_query_t target_query);
+void DeleteQuery(bus_query_t *target_query);
 
 /**
  * 释放请求链表占据的空间
- * @param queries 请求链表的头节点
+ * @param head 请求链表的头节点
  */
-void FreeQueries(bus_query_t queries);
+void FreeQueries(bus_query_t *head);
 
 #endif //AUTO_PILOT_BUS_QUERY_H
diff --git a/include/rail.h b/include/rail.h
index 9aa5df0..0ab4964 100644
--- a/include/rail.h
+++ b/include/rail.h
@@ -35,6 +35,11 @@ typedef struct rail_node rail_node_t;
  */
 extern rail_node_t *rails;
 
+/**
+ * 全局的计时器
+ */
+extern int bus_time;
+
 /**
  * 查找指定编号的站点指针
  * @param head 轨道的头节点地址
@@ -55,8 +60,10 @@ rail_node_t *CreateRails(int length, int node_num);
  * 释放分配的内存空间
  * @param railNode 轨道链表的头节点
  */
-void FreeRails(rail_node_t railNode);
-
-int add(int a, int b);
+void FreeRails(rail_node_t *head);
 
+/**
+ * 时间走过一秒
+ */
+void AddTime();
 #endif //AUTO_PILOT_BUS_RAIL_H
diff --git a/src/bus.c b/src/bus.c
index f47b66b..0d08cab 100644
--- a/src/bus.c
+++ b/src/bus.c
@@ -1 +1,3 @@
-#include "bus.h"
\ No newline at end of file
+#include "bus.h"
+
+bus_t *the_bus;
\ No newline at end of file
diff --git a/src/query.c b/src/query.c
index 642474b..893d9c7 100644
--- a/src/query.c
+++ b/src/query.c
@@ -3,5 +3,70 @@
 //
 #include "query.h"
 
+bus_query_t *queries = NULL;
 
+bus_query_t *CreateQuery(int type, rail_node_t *node)
+{
+    bus_query_t *p = (bus_query_t *)malloc(sizeof (bus_query_t));
+    p->node = node;
+    p->type = type;
+    p->time = bus_time;
+    p->next_node = NULL;
+
+    if(queries == NULL)
+    {
+        queries = p;
+    }
+    else
+    {
+        // 寻找链表的末节点
+        bus_query_t *last_node = queries;
+
+        while(last_node->next_node != NULL)
+        {
+            last_node = last_node->next_node;
+        }
+
+        last_node->next_node = p;
+    }
+
+    return p;
+}
+
+void DeleteQuery(bus_query_t *target)
+{
+    if(target == queries)
+    {
+        queries = target->next_node;
+    }
+    else
+    {
+        bus_query_t *node = queries;
+
+        // 找到被删除节点的上一个节点
+        while(node->next_node != target)
+        {
+            node = node->next_node;
+        }
+
+        node->next_node = target->next_node;
+    }
+
+    free(target);
+}
+
+void FreeQueries(bus_query_t *head)
+{
+    bus_query_t *p = head;
+
+    while (p != NULL)
+    {
+        bus_query_t *temp = p;
+        p = p->next_node;
+        free(temp);
+    }
+
+    // 将全局的请求列表头指针置为空
+    queries = NULL;
+}
 
diff --git a/src/rail.c b/src/rail.c
index 3c12e72..356d398 100644
--- a/src/rail.c
+++ b/src/rail.c
@@ -1,11 +1,7 @@
 #include "rail.h"
 
 rail_node_t *rails = NULL;
-
-int add(int a, int b)
-{
-    return a+ b;
-}
+int bus_time = 0;
 
 rail_node_t *CreateRails(int length, int node_num)
 {
@@ -63,3 +59,23 @@ rail_node_t *FindNode(rail_node_t *head, int id)
     return NULL;
 }
 
+void FreeRails(rail_node_t *head)
+{
+    rail_node_t *p = head;
+
+    while (p != NULL)
+    {
+        rail_node_t *temp = p;
+        p = p->next_node;
+        free(temp);
+    }
+
+    // 将全局的轨道指针置为空
+    rails = NULL;
+}
+
+void AddTime()
+{
+    bus_time++;
+}
+
diff --git a/test/rail_test.cpp b/test/rail_test.cpp
index b3170f8..d05bf4b 100644
--- a/test/rail_test.cpp
+++ b/test/rail_test.cpp
@@ -41,7 +41,7 @@ TEST(rail, CreateRails)
 TEST(rail, FindNode)
 {
     rail_node_t *head = CreateRails(10, 10);
-    rail_node_t *p = nullptr;
+    rail_node_t *p;
 
     p = FindNode(head, 3);
     EXPECT_EQ(p->id, 3);
@@ -50,6 +50,12 @@ TEST(rail, FindNode)
     EXPECT_EQ(p->id, 9);
 }
 
+TEST(rail, FreeRails)
+{
+    rail_node_t *head = CreateRails(10, 10);
+    FreeRails(head);
+}
+