[Tagging] Tagging average speed [Was: Re: Residential roads]

[John F. Eldredge]

On 10/04/2010 05:51 AM, Elena ``of Valhalla'' wrote:
> On 2010-10-04 at 10:57:19 +0100, Woll Newall wrote:
>   
>> I wouldn't use 'average speed' for the tag, because it implies something 
>> else, but that's what the OP chose for this thread. 'traffic speed' or 
>> something like that would be better.
>>     
> I'm not a native speaker, so any improvement on the tag names is welcome.
>
>   
>> [...]
>> If I go to the nearest main road to my house in between the hours of  
>> 16:00 and 18:00 every weekday, I can measure the speed at which the  
>> traffic is moving. It will be consistent every day. [...]
>> In UK cities, I expect many roads are like this. [...]
>>     
> It is the same in many cities and town in Italy
>
>   
>> Routing programs can't use heuristics to work out these speeds, they are 
>> too dependent on local micro-conditions. But we can measure them.
>>     
> +1, expecially the times that are considered rush hour or not are 
> very dependent on local conditions, and not easily calculated 
> from known osm data.
>
>   
So, would we be tagging the average speed at rush hour, the average
speed when it isn't rush hour, or what?  There are going to be many
special non-rush-hour exceptions as well; for example, the average speed
past a sports stadium is going to be much slower during the periods
shortly before, and shortly after, an event at the stadium.