Starting with the weather service needs of public transportation before departure, it is to study the ideas and techniques of highway traffic weather service to conduct monitoring, forecasting, and early warning. First, the highway traffic meteorological observation network principles and site selection rules for highway traffic are determined. Second, some key techniques, including the road inversion based on hybrid spatial analysis technology and route analysis, are studied. Third, integrating such high impact meteorological elements as weather, visibility, and wind, a model of highway meteorological conditions is established. The weather products of monitoring, forecasting and early warning gave the public an intuitive and effective service. The Highway Traffic Weather Service System (HTWS) began to provide service through the traffic channel of Weather China during Spring Festival of 2014， effectively promoting public's convenience and travel safety.