Concepts | Base case | Sensitivity analyses | |||||
179 people who avoided injury | 902 people who avoided injury | One death also avoided | Maximum VSL | All implementation costs accrued in first year | No time lost due to speed reduction | ||
WTP slight injuries | 8 548 744.05 | 3 018 129.66 | 15 208 697.70 | 8 548 744.05 | 11 081 70525 | 8 548 744.05 | 8 548 744.05 |
WTP moderate injuries | 10 975 783.50 | 3 864 712.50 | 19 524 527.55 | 10 975 783.50 | 14 227 867.50 | 10 975 783.50 | 10 975 783.50 |
WTP severe injuries | 982 339.65 | 392 935.86 | 1 768 211.37 | 982 339.65 | 1 273 403.25 | 982 339.65 | 982 339.65 |
WTP death | – | – | – | 2 810 700.00 | – | – | – |
Total benefits | 20 506 867.20 | 7 275 778.02 | 36 501 436.62 | 23 317 567.20 | 26 582 976.00 | 20 506 867.20 | 20 506 867.20 |
Implementation | 384 039.41 | 384 039.41 | 384 039.41 | 384 039.41 | 384 039.41 | 1 637 966.49 | 1 637 966.49 |
Maintenance | 253 536.10 | 253 536.10 | 253 536.10 | 253 536.10 | 253 536.10 | 253 536.10 | 253 536.10 |
Police | 327 708.22 | 327 708.22 | 327 708.22 | 327 708.22 | 327 708.22 | 327 708.22 | 327 708.22 |
Processing | 629 998.98 | 629 998.98 | 629 998.98 | 629 998.98 | 629 998.98 | 629 998.98 | 629 998.98 |
Time lost due to speed reduction | 12 880 620.95 | 12 880 620.95 | 12 880 620.95 | 12 880 620.95 | 12 880 620.95 | 12 880 620.95 | – |
Total costs | 14 475 903.66 | 14 475 903.66 | 14 475 903.66 | 14 475903.66 | 14 475 903.66 | 15 729 830.74 | 1 595 282.71 |
Ambulance | 106 470.00 | 37 590.00 | 189 420.00 | 106 470.00 | 106 470.00 | 106 470.00 | 106 470.00 |
Emergency | 57 402.54 | 20 266.38 | 102 124.44 | 57 402.54 | 57 402.54 | 57 402.54 | 57 402.54 |
Hospitalisation | 109 537.60 | 38 693.80 | 194 891.58 | 109 537.60 | 109 537.60 | 109 537.60 | 109 537.60 |
Total medical savings | 273 410.14 | 96 550.18 | 486 436.02 | 273 410.14 | 273 410.14 | 273 410.14 | 273 410.14 |
Property damage | 436 800.00 | 436 800.00 | 436 800.00 | 436 800.00 | 436 800.00 | 436 800.00 | 436 800.00 |
Non-institutionalised | 82 018.72 | 28 956.02 | 145 918.04 | 82 018.72 | 82 018.72 | 82 018.72 | 82 018.72 |
Hospital stays | 39 573.81 | 13 979.07 | 70 420.55 | 39 573.81 | 39 573.81 | 39 573.82 | 39 573.82 |
Total productivity losses avoided | 121 592.53 | 42 935.09 | 216 338.59 | 121 592.53 | 121 592.53 | 121 592.53 | 121 592.53 |
Total savings | 831 802.67 | 576 285.27 | 1 139 574.61 | 831 802.67 | 831 802.67 | 831 802.67 | 831 802.67 |
Net benefit | 6 862 766.21 | −6 623 840.37 | 23 165 107.57 | 9 673 466.21 | 12 938 875.01 | 5 608 839.13 | 19 743 387.16 |
Cost/person who avoided injury | 28 552.08 | 80 870.97 | 16 048.67 | – | – | – | – |
VSL, value of statistical life; WTP, willingness to pay.