This repository contains the source data for the Nature paper "Insulator-free topological photonic multi-lane highways", organized into 29 .xlsx spreadsheet files grouped by figure family and panel under Main-Figs and Extended-Figs directories. The data supports generating the main-text and extended-figure panels, with filenames matching corresponding figure groups. The repository excludes Mathematica plotting scripts and local operating-system files, and includes citation metadata in CITATION.cff and a LICENSE file for reuse.