[pgrouting-users] adding barriers

Stephen Woodbridge woodbri at swoodbridge.com
Fri Dec 25 07:03:52 PST 2015

On 12/25/2015 2:27 AM, Bulut Aras wrote:
> Hi,
> We are trying to build a routing application which includes barriers
> (point, line). But, instead of avoiding entire road we want to exclude
> only sub-part of that road.
> Barriers may be point (a point on a road) or line features (sub-part
> of a road calculated using LRS) in another tables.
> Can we implement this using pgRouting and postgis?

Yes, in pgrouting when you make a query for a route, you pass in the 
edges and edge weights you want considered for that route. So you can 
remove edges or set the weight to very high value that would not be 
accessible before you pass them to the query.

For point barriers, I think I would split the edges that they sit on and 
added a zero or very short edge at the barrier. then you can do 
something like:

select * from pgr_dijkstra('select * from edges where barrier is false', 

Here I assume that you have added a column to your edge table called 
barrier that is boolean.


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