Abstract:At present, there is more and more construction of urban underground road, which plays an important role in the urban transportation system. However, in emergency situations such as flooding and fire, the casualties and property losses caused by not timely control of underground road vehicles also occur. And the safety of underground roads is faced with challenges. Some suggestions are put forward, such as multi-level warning for underground road closure, physical interception requirement and safe-efficient control system through the research on the control method, overall scheme and equipment requirement of underground road entrance. Through the literature, demand research and technology comparison validation, the intelligent control system, control flow and its main technical requirements of underground road entrance are proposed including the physical control facilities, lane signals, traffic sensing facilities, information dissemination facilities and acousto-optical warning facilities. And the scheme design and engineering application are carried out in the case of the Hengli Island Tip Underground Loop in Nansha of Guangzhou. The proposed underground road entrance intelligent control system can improve the efficiency of underground road entrance traffic control under the emergency working conditions and enhance the safety level of underground roads.