Is a jam possible in Traffic data?

Questions, answers, discussions related to IEEE ICDM Contest

Is a jam possible in Traffic data?

Postby kvdesai » Sat Aug 07, 2010 2:43 pm

Hello,

I have a quick question about traffic data.
The task description says:

"A time series of simulated congestion measurements from 10 selected road segments of Warsaw is given.... Congestion - the number of cars that passed a given segment - is measured in consecutive 1-minute periods of time".

So, I understand that "congestion" is defined as the number of cars that *passed* a given segment in 1-minute period. Then, a value of 0 could occur in two scenarios:
1. No cars entered in the segment in the given 1-minute period, so the segment was completely empty.
2. There was a Jam on the segment, so while many cars stayed on the segment, no car "passed" the segment in the given 1-minute period.

Its easy to show that the ambiguity is not limited to value of 0.

Is the possibility#2 explicitly avoided in the simulation by making sure that there is no Jam in the traffic data?
Or is congestion actually to be understood as the number of cars that *entered or stayed* in a given segment in 1-minute period?

Thanks much!
kvdesai
 
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Joined: Wed Jun 23, 2010 7:52 pm

Re: Is a jam possible in Traffic data?

Postby pawelg » Thu Aug 12, 2010 8:11 pm

Hello,

Thanks for your question!

Traffic jams may occur in the traffic data. Congestion is the number of cars that passed a given segment.

Best regards,
Pawel Gora
pawelg
 
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Joined: Fri Jun 25, 2010 9:12 pm


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