I would like to build a street network dataset for routing purpose from data included on media kit ArcGIS 9.3. I try to use streets feature class, which is in GCS North America 1983. I hardly found any metadata and I assume that Speed field defines values in miles per hour, and Shape Length in degrees. I need two directions attributes??? distance and time. In a network wizard I used Shape (value created by a network) as distance evaluator field and Shape /Speed as time evaluator. I checked the results and distance looks all right, but time value does not make sense at all. I thought that this is problem with units and tried Shape/(Speed*26.8224) to change miles per hour to meters per minute, but still is does not return any reasonable result. I know I am missing something, but I can???t see what. Does anybody used successfully this dataset to build a network?