| Re: [sumo-user] edge-based traffic measures |
1. at any given moment there is a total number of vehicles on an edge and this number varies over time. edgeData is a time-aggregate so you only get the average number of vehicles on the edge per second (computed as sampledSeconds / period).2. period denotes the time period that was aggregated. By default it's the whole simulation time but you can change it with attribute 'freq'3. based on edgeData alone you cannot get an unbiased aggregate since vehicles may briefly occupy two edges at the same time and are thus counted twice when summing edgeData. You can eithe accept this bias or do you own aggregation based on unaggregated data (i.e. fcd-output)._______________________________________________Am Di., 21. Dez. 2021 um 00:51 Uhr schrieb Royal Bhandari <royalbhandari6@xxxxxxxxx>:Hello,_______________________________________________I have several questions regarding edge-based traffic measures:
- What is the difference between the total number of vehicles on an edge and the average number of vehicles on an edge? (is av num of vehicle in an edge = num of vehicles in a particular edge/no of edges, irrespective of the length of each particular edge?)
- What is the value of the period in the attached figure if I simply have a single simulation with begin time = 0 and end time = 3600?
- It is mentioned that "Spatial aggregation (over multiple edges or lanes) is not as easy". However, the process of doing this is not given. Please direct me to this.
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