[OSM-newbies] Advice needed for mapping traffic restrictions

[Sebastian Arcus]

I'm not really sure how to map the traffic restrictions on a short 
section of Upper Northgate Street in the following section of the map:

http://www.openstreetmap.org/node/8087537#map=19/53.19463/-2.89291

The section in question is between the junction with Delamere Street and 
George Street/Canal Street. The situation for this particular section is 
as follows:

1. Going north all traffic is allowed.
2. Going south, only bicycles and buses are allowed.

Would the only way to achieve the above be to split it into northbound 
and southbound lanes and apply restrictions separately? I only noticed 
it because the navigation software I use (based on OSM) tried to take me 
southbound on that section - so I made myself a note to try and amend 
things on OSM - if possible :-)

Further south on Upper Northgate Street, after the juction with George 
Street/Canal Street, things get even more complicated as it is "No 
vehicles except cycles and for access - Mon-Sat - 8am-6pm" - jeez - I'm 
not even going to attempt to add that one to OSM :-)

Many thanks for any suggestions