[pgrouting-dev] Support for Time Constraints

[Anton Patrushev]

Hi Jay,

No, there was no specific meaning, just king of cyphering - first
digit for road class and then two last digits for road type.

Anton.

On 6/12/11, Jay Mahadeokar <jai.mahadeokar at gmail.com> wrote:
>> Hi Jay,
>>
>> I think that instead of just random times, I would take a different
>> approach to generate this data. If we think about "rush hour" around a
>> major
>> city, the highways (based on road class) flowing into the city in the
>> morning would get reduced average speeds you could apply curve like
>> average
>> speed*percent based on 6am (90%), 7am(75%), 8am(45%), 9am(50%), 10am(85%)
>> and do something similar in the evening rush. It might be too hard to
>> figure
>> on direction of flow in/out bound so apply the curve to all traffic. The
>> assumption is that the highways are congested which will force traffic
>> onto
>> side streets. You might want to also reduce the lower class speeds by say
>> a
>> constant 80% during rush hour.
>>
>> If we can get OSM data then it should be easy to populate the table with
>> that data.
>>
>> -Steve
>>
>
> I am trying to write plpgsql query to generate time-dependent data
> corresponding to the ways table in pgrouting workshop. As suggested by Steve
> above, instead of generating random data, I will follow patterns (see above
> message) so that the data is nearer to the real worlds scenario.
>
> So, now I need to make distinction between highways, streets etc. I saw the
> attribute class_id in ways table. It has 14 distinct values:
>  class_id
>
> ----------
>
>
> 102
>
>
> 122
>
>
> 106
>
>
> 111
>
>
> 108
>
>
> 100
>
>
> 109
>
>
> 112
>
>
> 101
>
>
> 110
>
>
> 401
>
>
> 119
>
>
> 117
>
>       114
>
> Any specific meaning attached to these values? I did not find any
> information on the pgRouting-workshop website [1].
>
>
> Thanks in advance.
>
> [1] http://workshop.pgrouting.org/chapters/topology.html
>
> --
> Regards,
> -Jay Mahadeokar
>


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