A New Approach to Shortest Route Finding in a Railway Network with Two Track Gauges and Gauge Changeovers

Figure 5

Between Madrid and Zaragoza and between Zaragoza and Tardienta, there is a high-speed line of standard gauge (thick line) and an Iberian gauge line (dashed line). There are gauge changeovers at Madrid and Zaragoza (stars). Between Tardienta and Huesca, there is a dual gauge section (thin line). Between Tardienta and Huesca, there is only an Iberian gauge line (dashed line).