[OSM-talk] Routing over barrier nodes

[Shaun McDonald]

On 10 Sep 2009, at 08:29, Lulu-Ann at gmx.de wrote:

> Currently the problem with routing is, that routing applications can  
> not check for millions of nodes, but only for thousands of ways  
> without performace problems.
>
> That results in the problem, that for example barrier bollards in  
> the middle of the road can not be considered.
>
> I recommend to add a route_nodes=yes or router:check_nodes=yes to  
> such ways, so that the routing software can check only the ways in  
> first run and then check the nodes on ways only where this is set.
>
> Comments?

No. That is a waste of time and error prone. They should be doing some  
more preprocessing. I know that the routing engines can take into  
account of nodes as I have seen at least 2 that know about the traffic  
lights nodes.

The other problem that I see is the meaning of the different types of  
barrier. The authors don't know the full list, not do they know  
whether you can get past them in each mode of transport. Can you  
please point to a wiki page that contains a table with each row being  
a set of tags and each column having the modes of transport (motorcar,  
foot, bicycle, etc.)? If not can you please make one.

Shaun