Airbus A340 - same as A320/1 given above. Genrally we disconnect when slow enough to see what the hell's happening outside
but A/P will remain engaged until the aircraft longitudinal axis diverges from the runway centreline by 20 degrees (I think - may be 30) ie. you can start turning off with the A/P engaged (NWS overriding A/P).
The yaw bar at the bottom of the PFD will give you centreline guidance if you need it - much easier to let the aeroplane do it till you can assimilate what's going on outside!!