Shapefile output
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Command line traffic-engine outputs shapfile. The shapefile shall be a linestring shapefile, where objects are tagged with speed statistics.
One significant challenge of this is that each way segment will have 336 attributes - a count and a mean for each hour of the week. 225 is the maximum number of fields for a shapefile. The shapefile would either need to store more coarse statistics - average speed overall, for example - or the shapefile could ship with a variety of id-keyed statistical extract CSVs which one could join to the shapefile in the GIS application of their choice.
What's the target application you have in mind -- postgis? I wonder if it's worth fitting .shp's square peg into this round hole. GeoJSON, maybe?
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