The web team for the Lord of the Rings Online has published another of their Exploring Middle-earth articles. The focus of this installment is the 'The Greenway'.

In the days of Elendil and his descendents, the North Road ran from Fornost down through Andrath until it became the South Road at Tharbad. From there it continued all the way to Minas Tirith in Gondor as the primary trade-route between the North and South Kingdoms. The wars with Angmar and Rhudaur that brought the North-kingdom to an end also caused trade between north and south to fail.

You can read the article here, or here from the European site.