[OSM-talk] average speed as opposed to speed limit in calculating routes

Dave Sutter sutter at intransix.com
Sun Aug 26 20:53:22 BST 2012

This sounds like a great open source project. What would be needed is
a good map client for mobile that could hopefully get decent usage
penetration. GPS from users would be collected and used to calculate
average and, with enough data, current speeds. The GPS traces could
also be used for updating or at least verifying the OSM database.
Traffic data most likely should be kept in a separate database.

Of course, this is what Waze is trying to accomplish. Google and other
mapping companies are doing it too.


On Sun, Aug 26, 2012 at 4:10 AM, Pavel Melnikov <positron96 at gmail.com> wrote:
> Hello all.
> There are some services (proprietary) that show traffic jams and events that
> can slow you down here in Russia. The values are collected from real users
> using mapping application that sends speed data. This data is also used to
> calculate routes.
> This feature is very useful actually, and it would be great to implement
> something in OSM. However, I think it should not be included in static osm
> database using tags and values (because these values are likely to change
> rapidly), but use a different database (and different project maybe) that
> collects and shows on-line live data. For example, at rush hours we have
> many traffic jams, at night and on weekends we have none, all for the same
> street - and this live data could be used to calculate routes.
> On Sun, Aug 26, 2012 at 4:41 PM, renato <rennabh at gmail.com> wrote:
>> Hi, I've been trying out the Waze android GPS navigator and the one
>> feature I really find useful of it is that, in route calculation, it
>> doesn't use the road speed limit but rather the actual average speed on
>> that road, calculated from the data gathered from other users driving
>> those roads.
>> In a few days of use, I have discovered some new routes for places I
>> regularly go to, routes that are less known but certainly faster (avoid
>> traffic lights for example). Also the time estimates are way better
>> than Osmand (the only OSM navigator I actively used, but I plan on
>> trying other ones).
>> Could something like this be done in OSM? Has someone ever thought of
>> it? First thought would be an average_speed_by_car tag, that navigators
>> could use in calculating routes. Even better would be an automated way
>> of updating these tags by users using the navigator.
>> just curious to know thoughts about this idea,
>> cheers
>> renato
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