Which data source is the ONLY valid authority for deciding the road sub-type (RST)?

When can Google Maps signs be used while annotating RST?

You see a speed/CE sign clearly on GM, but it does NOT appear on MM. What should you do?

How many signs on MM are required to define a road sub-type?

You have a CE sign on MM on one side of the road and nothing on the opposite side. The surroundings look built‑up. What should you do?

In an area with almost no signs visible on MM and confusing surroundings, how should you annotate the RST?

When defining where an URBAN section should END, and there is no explicit ending sign on MM, what guidance should you follow?

You see a school zone sign on MM (e_school_zone). What is the correct behavior for RST?

You see a legal speed sign on GM but neither speed sign nor relevant zone sign appears in MM. What is the correct RST action?

When should you use Street View (open from MM via right‑click → View in Google Maps street view)?

If a sign doesn’t appear on MM but does appear on GM, I can still use it to set the road sub-type.

If I’m not sure whether a segment is urban or interurban and I have no indicator on MM, I should mark it as Unknown.

One CE sign on MM in a built‑up area is enough to classify the nearby segment as urban.

GM can be used as a reference in rare cases, but MM is always the authority for RST.

If I don’t know exactly where the urban area ends, I can use the last building or junction as a free‑style endpoint.