[OSM-talk] ferry route speed

[Mark Williams]

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Kevin Ryan wrote:
> Should probably give some indication of the max and min.  Helsinki to
> Tallinn can be done in about 40-45 minutes during the summer in the fast
> ferries.  Winter time the fastest is about 4 hours.
> 
> 2008/9/2 Gervase Markham <gerv-gmane at gerv.net>
> 
>> Shaun McDonald wrote:
>>> That low speed is far too low. When I was on the Holyhead to Dublin
>>> ferries recently, my GPS was giving 45mph for the return journey, and
>>> 25-30mph for the outward (different ferries, the return was the swift
>>> fastcraft).
>> Hmm. Perhaps we need maxcrossingtime and mincrossingtime.
>>
>> Gerv
>>
>>

Obviously, not all ferrries are the same. The low speed was indeed to
account for loading time.

max & min is fine, but doesn't account for time of day / no ferry for 5
hours.

Timetables can vary quite frequently.

I can't think of any way other than a link to the operator's URL that's
going to allow this to actually, really, work for timings, so some sort
of guide value is required - I do think this should be per route not
generic, the average I alluded to earlier is in the nature of a fix
because right now, I haven't seen an OSM-based router route on ferries
at all, so a silly time is better than avoiding it altogether.

Mark
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