Flowrouter only sums up the lanes and doesn't concern itseelf with flow per lane So there are two seeprate issues to this:
1) total flow: Looking at time 90, the simulation has a deficit of ~1300 vehs/hour. This could be due to the low aggregegation interval of 1 minute because flowrouter does not take driving time between detectors into account. Whenever the flow changes a lot, flowrouter tends to underestimate total flow. To compensate, set a higher value for option -i 2) vehicle distribution across the lane. This distribution comes out of the simulation dynamics and depends mostly on - configuration for insertion lanes and insertion speed - the parameterization of the vehicle fleet in regard to lane changing - the distribution of desired speeds regards, Jakob Am Di., 2. Apr. 2019 um 12:43 Uhr schrieb Fredrik Nilsson < [email protected]>: > I accidentally attached the Speed over time plot instead of the Flow over > time plot, it's attached here. > ------------------------------ > *From:* [email protected] <[email protected]> on > behalf of Fredrik Nilsson <[email protected]> > *Sent:* Tuesday, April 2, 2019 12:39 > *To:* Sumo project User discussions > *Subject:* [sumo-user] Low flow in lane with flowrouter > > Hi, > > I've been tuning a simulation to match real detector data and I have a > somewhat odd issue that I was wondering if anyone can perhaps come up with > a reason for. I have imported the network from OSM and made some slight > changes, I have attached a picture of the network (blue lines are where > detectors are present, one per lane) and the detectors whose results I want > to match to reality are the ones inside the red circle (from the left to > the right they are detectors 35138, 35139, 35140 and 35141). > > I have also attached pictures of the flow over time for both real data and > simulated data (red is simulation, blue is real data) and a density-flow > fundamental diagram scatter plot (red is simulaton, blue is real data). > > Now, as can be seen on 35138 (the left most lane in the red circle) the > flow is very low compared to reality and this problem only seems to exist > on that lane. I have generated the flow and route files with flowrouter.py > with 1 minute intervals (the same as the real world data that it was > generated from). > > Can anyone think of a reason why my flow would be so low on this specific > lane and if perhaps I could make some changes to flowrouter settings to > make it better? > > Sorry for the long question and best regards, > > Fredrik > _______________________________________________ > sumo-user mailing list > [email protected] > To change your delivery options, retrieve your password, or unsubscribe > from this list, visit > https://www.eclipse.org/mailman/listinfo/sumo-user >
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