Multimodal Transport Path Selection of Cold Chain Logistics Based on Improved Particle Swarm Optimization Algorithm

Table 3

Transport distance between node pairs.

Adjacent node	Distance (km)
	Highway	Railway	Airway
(1, 2)	375	347	343
(1, 3)	775	706	667
(2, 3)	892	1040	644
(2, 4)	694	960	580
(2, 6)	1153	1390	895
(3, 5)	333	362	288
(4, 6)	483	505	—
(4, 7)	602	579	514
(5, 6)	513	536	480
(5, 8)	846	1182	729
(6, 7)	432	646	346
(6, 8)	446	401	359
(6, 9)	418	412	421
(7, 9)	223	232	—
(7, 10)	1160	1195	1032
(8, 9)	313	593	—
(8, 10)	976	991	803
(9, 10)	962	963	876