The Effects of the Tractor and Semitrailer Routing Problem on Mitigation of Carbon Dioxide Emissions

Table 2

Computational results for the 40 test problems.

Problem	SA			LBM			gap1; (%)	gap2; (%)
	Percentage of satisfied; freight demand (%)	Tractor; quantity	CO2 emissions; per ton-kilometer (g/tm)	Percentage of satisfied; freight demand (%)	Tractor; quantity	CO2 emissions; per ton-kilometer (g/tm)
RAND5-1	86	13	51.85	86	12	50.39	3.83	2.90
RAND5-2	86	14	54.65	86	12	49.01	0.99	11.51
RAND5-3	87	12	49.99	87	15	49.16	1.30	1.69
RAND5-4	88	16	49.99	86	15	50.27	3.59	0.56
RAND5-5	89	10	57.33	87	12	50.20	3.44	14.20
RAND5-6	88	15	50.56	88	17	49.85	2.72	1.42
RAND5-7	88	13	49.97	86	14	49.13	1.24	1.71
RAND5-8	86	16	50.74	87	19	50.78	4.64	0.08
RAND5-9	89	14	50.77	89	18	51.29	5.69	1.01
RAND5-10	85	14	49.17	85	20	50.14	3.32	1.93
RAND6-1	85	14	48.95	85	19	50.35	3.75	2.78
RAND6-2	90	19	48.92	89	25	49.86	2.74	1.89
RAND6-3	86	18	50.13	86	23	50.79	4.66	1.30
RAND6-4	86	17	49.97	86	18	48.89	0.74	2.21
RAND6-5	89	14	48.71	88	18	49.22	1.42	1.04
RAND6-6	86	16	48.70	86	24	50.25	3.54	3.08
RAND6-7	90	17	48.82	89	25	49.86	2.74	2.09
RAND6-8	88	17	49.82	86	20	49.50	2.00	0.65
RAND6-9	90	17	48.64	89	25	49.95	2.93	2.62
RAND6-10	88	18	48.73	86	27	50.35	3.75	3.22
RAND7-1	90	21	49.84	88	26	50.12	3.28	0.56
RAND7-2	86	17	50.37	87	19	50.59	4.24	0.43
RAND7-3	90	18	49.13	89	27	54.03	11.33	9.07
RAND7-4	86	19	49.72	85	22	50.05	3.13	0.66
RAND7-5	85	16	52.36	85	16	53.08	9.38	1.36
RAND7-6	85	14	51.95	85	12	51.81	6.76	0.27
RAND7-7	85	14	52.08	85	14	53.17	9.56	2.05
RAND7-8	85	16	52.77	85	16	53.79	10.84	1.90
RAND7-9	85	13	54.79	88	13	53.58	10.41	2.26
RAND7-10	85	16	55.69	85	15	53.04	9.29	5.00
RAND8-1	86	21	49.49	86	32	49.74	2.49	0.50
RAND8-2	88	24	52.82	89	13	49.57	2.14	6.56
RAND8-3	89	24	51.35	89	26	50.62	4.31	1.44
RAND8-4	88	24	51.68	89	20	50.17	3.38	3.01
RAND8-5	88	23	50.83	88	24	50.51	4.08	0.63
RAND8-6	89	22	54.88	89	22	53.96	11.19	1.70
RAND8-7	88	22	53.04	89	22	50.33	3.71	5.38
RAND8-8	87	22	52.82	87	26	50.84	4.76	3.89
RAND8-9	87	27	49.99	87	38	52.05	7.25	3.96
RAND8-10	87	26	50.95	87	36	52.61	8.41	3.16