Occasionally I've found streets which have particular land uses or addresses on either side of the street, but where I haven't wanted to set up a whole 'area' near the street to mark the feature.
For example, here on Chingford Road there is something odd with the house addresses. One side of the street has one postal street name and the other side has a different name. Yet the road in the middle is still called Chingford Road. I resolved this by creating a closed area with landuse=residential on each side and attaching the pseudo-street-names to that. But I wonder if there was a better way.
Now I am wondering what happens when the street itself has a particular land use. What about nearby Walthamstow High Street ? This is a street market and the way has been tagged with landuse=commercial. However, is it allowed to attach landuse to a way, or must it be a closed area? Is the right answer to create a fairly arbitrary area either side of the street as I did above?
Similarly, there are some odd roads which belong to industrial estates. I am tempted to tag those with landuse=industrial but I fear this is only allowed for areas. What's the official policy here?