Optimization of Life Cycle Extension of Asphalt Concrete Mixtures in regard to Material Properties, Structural Design, and Economic Implications

Table 6

The results of the rehabilitation, maintenance, and user costs.

Variant	Variant scenario	Rehabilitation 5th year	Rehabilitation 10th year	Rehabilitation 15th year	Rehabilitation 20th year
Rehabilitation action	—	Overlay; 36 mm	Overlay; 52 mm	Overlay; 62 mm	Overlay; 71 mm
Investment cost	0	69 084	99 788	118 978	136 249
Maintenance cost	846 938	858 066	941 350	1 162 456	1 581 330
Road agency cost	846 938	927 150	1 041 138	1 281 434	1 717 579
Road user costs
Vehicle operating cost	8 316 431	9 995 382	11 689 165	13 594 956	16 045 362
Travel time cost	822 241	973 891	1 125 826	1 290 801	1 569 194
Total road user cost	9 138 673	10 969 273	12 814 991	14 885 757	17 614 555
Life cycle length	20	25	30	35	40
Optimization index	0	475 857	461 871	461 920	483 303
CBA
NPV	—	20 333	26 739	14 527	1 438
IRR	—	48.30%	155.10%	139.40%	99.50%
PP	—	6	11	15	20