This paper analyses the existing expressway data network, presents a new model based on the data network extended understratum, and gives out two achieved project, enumerates the key configure.

• 在分析了现行高速公路数据网络的基础上,针对高速公路省域内的联网收费要求,提出了数据网络底层扩展的全新技术模型,并结合工程实践给出了两种实现方案,列举了方案实现的关键配