I have been doing a lot of mapping of Thailand recently, and the country has many roads that are separated by an impassable median. I am assuming that any road where the median is physically impassable (such as having armco/concrete barrier, hedges, or even grassed areas) should be drawn as two parallel ways (with one way tags usually). Conversley, any road where the divide can be physically (even if illegally) crossed, such as a white line, even if double & continuous, then it is to be drawn as a single way. Does that fit with OSM convention ? Russ

I have been doing a lot of mapping of Thailand recently, and the country has many roads that are separated by an impassable median. I am assuming that any road where the median is physically impassable (such as having armco/concrete barrier, hedges, or even grassed areas) should be drawn as two parallel ways (with one way tags usually). Conversley, any road where the divide can be physically (even if illegally) crossed, such as a white line, even if double & continuous, then it is to be drawn as a single way. Does that fit with OSM convention ? Russ