[OSM-newbies] Joining two pieces of a way

[Jeff Barlow]

Cartinus <cartinus at xs4all.nl>  wrote:

>Here is an example of a turn restriction. Both the secondary and the 
>unclassified road continue, but they are split at the crossing to make the 
>turn restriction relations.
>
><http://www.openstreetmap.org/?lat=52.063909&lon=5.173566&zoom=18&layers=B000FTF>

Okay, I see it but I don't understand it. What is that symbol in
the intersection? I don't see it in the map key. What is a "turn
restriction"? How is it rendered differently from a typical
intersection? 

-- 
Later,
Jeff