These supplemental materials serve as a comprehensive "user guide" for the paper "I Walk an Ancient Road: A Straightforward Methodology for Analyzing Intra- and Inter-regional Connectivity Systems along Roman Frontier Zones (c. 1st — 5th century AD)." The materials are designed to be easy to reproduce, readable, and understandable for all users. They are free to use, adapt, and further develop, with all relevant data sources and results linked where they are directly included as supplementary data. In cases where results are not provided here, they can be found in the corresponding paper.