answers inline...
When I used > DFROUTER to determine the type (source or sink) of the detector, most of my > detectors are classified as TYPE: discarded. > when I see the sourceSink.xml file generated from flowrouter.py, I just see > one source and one sink. what is the reason for this? I have attached the > file! > detector classification is done by checking whether the detector has any predecessor or successor edges. This works for networks that are cut after at the motorway ramps (on ramps would be sources and off-ramps would be sinks). > > What should be the unit of time when defining the flow in the above code? > is > it minute or seconds? > flow files use minutes (this is for historical reasons because these files used to come from a highway authority in that format). everything else in SUMO uses seconds > > when converting the OSM to the sumo network, is the length of the network > always in meters? yes > > Should the speed be assigned in m/s or other > units? > always m/s > why most of my detectors are under type discarded > and how can this be improved? > You could use routeSampler.py instead of DFROUTER or flowrouter.py. This avoids the need for detector classification and has a number of other advantages. See https://sumo.dlr.de/docs/Tools/Turns.html#routesamplerpy as well as https://sumo.dlr.de/docs/Demand/Routes_from_Observation_Points.html#introduction regards, Jakob
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