hrmm_arc_routing_dataset

This dataset supports the manuscript “A Carbon-Aware Multi-Depot Semi-Open Arc Routing Problem for Heavy-Duty Railway Maintenance Machinery” submitted to Engineering Optimization. The package contains anonymized/projection-based railway maintenance routing instances, exact-validation outputs, Gurobi solver logs and solution files, heuristic-vs-solver diagnostic comparisons, EG-HGA calibration results, final repeated benchmark results, statistical-test outputs, and reproduction scripts. The exact-validation pool contains 10 XS/S instances solved to optimality by Gurobi with zero final MIP gap. The final benchmark contains 15 S/M/L instances and compares EG-HGA, GA, PSO, and CUS with 30 independent runs per algorithm-instance pair. The package also includes normality tests, Friedman rank tests, Holm-corrected Wilcoxon post hoc tests, effect-size summaries, convergence traces, and table/figure input data. The route-network data are anonymized/projection-based research instances prepared for reproducibility. Gurobi validation requires a working Gurobi installation and license.