Simultaneous Optimization of Train Timetabling and Platforming Problems for High-Speed Multiline Railway Network

Table 9

Performance comparison with an increase in the number of trains for medium-sized cases.

Number of trains	Upper bound	Lower bound	GAP (%)	CPU time (s)
1-15	700	691.1	1.28	3600
1-20	959.5	951.7	0.81	3600
1-25	1207	1186.4	1.17	3600
1-30	1598.7	1513.6	5.32	3600
1-35	2040.4	1837.6	9.94	3600
1-40	2424.8	2203.6	9.12	3600
1-48	2983.6	2622.5	12.06	3600