[LarryMullins]

It would need to move at about 15 km/h at the equator, and slower at other latitudes. That's surprisingly reasonable.

[rtkwe]

In the story I believe they had built rails for it too to run on or at least hardened and sintered regolith courses to drive through. It's a surprisingly reasonable pace for even a huge structure to have access to prime solar energy continuously. The series it called Luna if you're interested, the social structure is a bit out there but I enjoyed them.