The Daughter’s Roads are a method of focusing magical energy into this world. They follow magical lines of power identified by Hwarin Dalthippa. The first road connects Jillaro with Mirin’s Cross and Filichet, drawing upon the cosmic mountain at Kero Fin. The second connects Jillaro with Cafol and Hilltown, drawing upon the cosmic mountain at Top of the World.
The roads themselves are masterpieces of the early Lunar Empire, often grouped with Glamour itself. Paved over with crushed stone, each road is 15 meters wide. Every 40 kilometers is marked by a crystalline temple to Hwarin Dalthippa. The roads are perfectly level, and as they travel over rivers, valleys, and lowlands, the roads are elevated atop high arched bridgework.
It is important to keep in mind a few things – first, the Daughter’s Roads are not primarily transportation routes (although they are certainly used for that). They are magical lines that bind Saird together and were necessary for Hwarin Dalthippa’s conquest.
Second, there are two of the (crisscrossing at Jillaro) and that is it. The last one was completed in 1347 and there are no more. In fact, I am not sure it is even possible to create another.
The roads themselves are marvels – the marvel of the Lunar Provinces. And they have enabled the Lunar Empire to control Saird for some three centuries, even when the Lunar Empire itself barely existed. There’s some murky stuff behind this as well – Ingakotum and Hwarin ruled as satraps, and their dynasty dominated Saird until 1514 (and were finally destroyed in 1561) – after that a Provincial Overseer was appointed by the Red Emperor (first Phargentes and later Appius Luxius). There have been some noted Dart Wars centered on the roads, but that gets particularly murky.