Table 1: Correspondence among roads names and numbers in the graph of Figure 2.

Real road Graph roads/segments

Via Giuseppe Mulè 1, 2
Via Luigi Monaco 3–14, 32, 33, 36, 37, 41–43
Via Luigi Russo 38–40
Via Poggio S. Elia 29–31, 34, 35
Via della Regione 15, 17–25, 27, 28
Via Cittadella 26
Via Aci 16, 64, 67, 68, 81
Via Malta 65, 66, 73, 74, 77–80, 82, 84–86
Corso Italia 83
Via Galatea 69–72, 75, 76
Via Leone XIII 54–61
Via Due Fontane 44–50, 53, 62, 63
Via Sd1 51, 52