I work on a network where I want to make up my own historic traffic data. For this I also want to differentiate between driving direction in terms of speed, meaning that one direction should have a lower/higher average speed than the other one. I'm aware that for this I have to create new attributes, for instance something like "FT_speed" and "TF_speed". Then I would create new attributes where the information of the driving direction is held. And there is my problem: the Help says (e.g. here http://resources.arcgis.com/en/help/main/10.1/index.html#//0047000001rs000000) that "0" indicates the starting point of the line feature "as defined by its digitized direction", "1" the ending point.
Well, I'm using OpenStreetMap data so I have no possibility to know the direction in which the feature was digitized, right? Am I missing some detail here? Or is there another way to get the info into the data?
Any help here is very much appreciated!
oms2nds reads and writes the vertices of OSM line features in the same order as they were digitized in OSM. Have a look at the network dataset attribute "Oneway". This restriction restricts roads based on the direction (From-To and To-From). You can use this network dataset attribute as an example for your case.
For users who don't have to deal with bigger traffic and road data, the Esri forum provides also a very handy solution for identifying the direction of digitizing:
"Also, within ArcMap, if you use the Network Identify tool on the Network Analyst toolbar and click on a feature, you will see a black arrow pointing in the direction of digitization. "
Maybe this info helps other user as well.