<div dir="ltr">Hi Peter,<div><br></div><div>Thank you for that info, I have voted for your answer at SO )) I started reading "Alternative Route Graphs in Road Networks" paper (my German is not good for the second one, but I plan to give Google Translator a try).</div>
<div><br></div><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
I do not really mean this with 'alternative route'. Avoiding traffic<br>
jam should be done via updating the edge weights and just recalculate<br>
the route with this 'barriers' taken into account.<br></blockquote><div><br></div><div>Yes, as I understand, this is a standard approach, but it is useful to find a single route. My goal is to find alternative ones, even they are not optimal considering current traffic situation. For example, if you your navigation system tells you to turn around and select and alternative (unusual) way, you may want to know why, and what current situation is along other alternative ways.</div>
<div><br></div><div>For example, there are traffic reports on radio stations / TV, but they are generic for whole city area. I would like to 'narrow' such reports to current driver's route, including alternatives.</div>
<div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div class="im"><br>
> so I would like to know their current status to select a better alternative.<br>
<br>
</div>Of course GraphHopper cannot help you to find out IF there is a traffic<br>
jam :) but if you know the status then GH can help.<br></blockquote><div><br></div><div>Yes, getting traffic data is another task, I know. I plan to receive such data linked to OSM roads, even it will need some manual work. There already are some services like that (reporting traffic situation to users), at least in our city (Nizhny Novgorod, Russia), but they are not automated at all (almost), and my goal is to make improvements in this area.</div>
<div><br></div><div>There are some sources of traffic information used by major map providers (such as Yandex Maps in RU), but it's unlikely they will share such info. Some other sources exists too, I'll use them if possible.</div>
<div><br></div><div>Thanks again,</div><div>Mike</div></div></div></div>