线路简介
广州3号线长36.86km，设18座车站，2006年12月28日开通运营。机场线（又称3号线北延段）长30.9km，设11座车站，2010年10月30日开通。
主要挑战
机场线信号系统项目不仅包括机场线30多公里的新线建设，还包括与既有3号线的割接和新车调试等。因此，机场线的开通必须建立在确保既有线3号线安全平稳运营的基础上。这个项目是2010广州亚运会的重要交通保障工程。
解决方案
广州3号线采用就近验证的、以通信为基础的SelTracTM CBTC移动闭塞系统，它通过感应环线通信系统来提供列车与轨旁之间的通信。列车设计运行最高速度可达120km/h，最短间隔可至90秒。
在项目执行中，根据现场情况，动态调整测试计划和测试项目；将测绘项目按照安全等级、安全认证等级、SMC（系统管理中心）非安全相关测试级等不同等级进行分类，有限测试保障线路开通的项目。最终测试项目从2113多项优化成1458多项，确保在短时间内顺利完成调试项目进而确保ATO的开通。
为确保信号调试对既有3号线运营得影响降到最小，在设计阶段就进行方案的设计，最终确定采用中央设备放在嘉禾站，与大石站控制中心设备采用光缆进行连接，并设计有切换控制设备，在白天测试的时候甩开既有3号线设备，晚上待3号线运营结束后在与其相连，既保证测试的可行，又节省测试切换影响时间。
在项目执行中，根据现场情况，动态调整测试计划和测试项目；将测绘项目按照安全等级、安全认证等级、SMC（系统管理中心）非安全相关测试级等不同等级进行分类，有限测试保障线路开通的项目。最终测试项目从2113多项优化成1458多项，确保在短时间内顺利完成调试项目进而确保ATO的开通。
为确保信号调试对既有3号线运营得影响降到最小，在设计阶段就进行方案的设计，最终确定采用中央设备放在嘉禾站，与大石站控制中心设备采用光缆进行连接，并设计有切换控制设备，在白天测试的时候甩开既有3号线设备，晚上待3号线运营结束后在与其相连，既保证测试的可行，又节省测试切换影响时间。
Overview
Guangzhou Metro Line 3 is 36.86 km long with 18 stations, opened on December 28, 2006. Guangzhou Metro Airport Line (also known as the north extension of Line 3) is 30.9 km long with 11 stations, opened on October 30, 2010.
Major challenges
The signaling system of the Airport Line includes the cutover with the existing Line 3 and the commissioning of new trains, in addition to the construction of a new line of more than 30 km long. Therefore, the opening of the Airport Line must be based on ensuring the safe and smooth operation of the existing Line 3. This project is a backbone for the Asian Games 2010 in Guangzhou.
Solution
Guangzhou Metro Line 3 adopted the proven communication-based SeITracTM CBTC moving block system. The communication between the train and the trackside equipment is achieved via the inductive loop communication system. The train can run as fast as 120 km/h and the headway is as short as 90 s.
During the implementation, the test plan and test items were constantly adjusted according to the site status. The surveying and mapping items were classified based on different levels such as safety level, safety certification level, and SMC (System Management Center) non-safety related test level, and items guaranteeing the opening of the line as scheduled were tested preferentially. As a result, 2,113 test items were optimized into 1,458. This allows the line to be opened with ATO functionality within a short period of time.
To minimize the impact of signal debugging on the existing Line 3, a plan was developed at the design stage. Based on the plan, the central equipment was placed at Jiahe station of Line 3, connected via optical fiber with the equipment of the control center at Dashi station. Switching control equipment was also provided. For daytime commissioning, it was independent of Line 3. At nighttime, it was connected to the line after the end of operation, which was feasible and time-efficient.
During the implementation, the test plan and test items were constantly adjusted according to the site status. The surveying and mapping items were classified based on different levels such as safety level, safety certification level, and SMC (System Management Center) non-safety related test level, and items guaranteeing the opening of the line as scheduled were tested preferentially. As a result, 2,113 test items were optimized into 1,458. This allows the line to be opened with ATO functionality within a short period of time.
To minimize the impact of signal debugging on the existing Line 3, a plan was developed at the design stage. Based on the plan, the central equipment was placed at Jiahe station of Line 3, connected via optical fiber with the equipment of the control center at Dashi station. Switching control equipment was also provided. For daytime commissioning, it was independent of Line 3. At nighttime, it was connected to the line after the end of operation, which was feasible and time-efficient.