some oecd countries such as canada and the united states have traditionally restricted regulations on land use prohibiting mixed land use to avoid the negative externalities of differences in land use such zoning still makes sense in many places although landuse regulations should be better coordinated to increase access on foot to local services and jobs deregulating zoning and introducing formbased zoning can be a way to revive urban centres as can establishing mixeduse zones that allow both business and residential uses this helps to reduce travel time to jobs and services and to improve access on foot or by public transit for older people