We used U.S. Detailed Streets in Smart Data Compression (SDC) format provided in the ESRI Data & Maps/StreetMap USA DVD to measure cost of drive time in Network Analyst. We would like to conduct a multimodal network analysis and take into account different travel modes to measure travel time in California. Does anyone know what data source to use to create a multimodal network that includes bus & pedestrian? I tried to create a new network dataset, but the SDC formatted Street feature class cannot be added on to the new network dataset. Thanks!