Appendix E Detailed fuel consumption coefficients (uninterrupted flow)

Table 56: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 6.419556 0.441226 12.43718 6.68E-05 0.006151 0.149391
02. Medium Car 7.771756 0.429248 14.42872 5.78E-05 0.005364 0.122652
03. Large Car 9.826507 0.473008 15.01703 4.7E-05 0.004258 0.08713
04. Courier Van-Utility 7.609467 0.284026 19.36752 6.91E-05 0.006175 0.110658
05. 4WD Mid Size Petrol 10.24522 0.464267 14.11609 5.05E-05 0.005148 0.063315
06. Light Rigid 8.085994 0.239071 13.9732 0.000116 0.012785 0.099828
07. Medium Rigid 12.45859 0.36312 9.564724 9.97E-05 0.014856 0.048677
08. Heavy Rigid 23.22869 0.243735 14.52463 9.95E-05 0.012912 0.019901
09. Heavy Bus 23.33246 0.271022 14.12877 6.85E-05 0.011434 0.01995
10. Artic 4 Axle 27.24712 0.160111 12.59432 0.000116 0.019467 0.021969
11. Artic 5 Axle 30.44964 0.265547 11.51051 0.000103 0.017613 0.014919
12. Artic 6 Axle 33.79927 0.303256 10.38151 9.34E-05 0.017999 0.013406
13. Rigid + 5 Axle Dog 38.14329 0.302384 9.066662 8.58E-05 0.02207 0.011962
14. B-Double 41.48179 0.32033 8.323599 7.96E-05 0.022113 0.010988
15. Twin steer + 5 Axle Dog 40.98332 0.321609 8.44159 8.01E-05 0.022176 0.011101
16. A-Double 47.75104 0.300993 7.10185 7.17E-05 0.024567 0.009609
17. B Triple 50.31407 0.30429 6.703995 6.89E-05 0.024871 0.009132
18. A B Combination 54.29232 0.287536 6.08939 6.64E-05 0.027662 0.008529
19. A-Triple 58.66595 0.27658 5.547481 6.39E-05 0.029925 0.00794
20. Double B-Double 61.23917 0.280027 5.283165 6.2E-05 0.029966 0.007613

Road width = 8.5m

RF = 0

Curvature = 20° / km

Source: ARRB Group Ltd.

Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 6.420102 0.439234 12.28431 6.7E-05 0.005893 0.157521
02. Medium Car 7.775476 0.42409 14.30184 5.84E-05 0.005073 0.130745
03. Large Car 9.832691 0.466236 14.90356 4.78E-05 0.003936 0.094725
04. Courier Van-Utility 7.616445 0.249977 19.61225 7.34E-05 0.005816 0.122244
05. 4WD Mid Size Petrol 10.25566 0.438984 14.39811 5.46E-05 0.00485 0.068036
06. Light Rigid 8.086364 0.225894 14.05784 0.000119 0.012559 0.102707
07. Medium Rigid 12.46055 0.261205 10.88355 0.000116 0.014085 0.053823
08. Heavy Rigid 23.2391 0.161191 15.62442 0.000114 0.012347 0.021583
09. Heavy Bus 23.37863 0.184935 15.22807 8.3E-05 0.010906 0.02188
10. Artic 4 Axle 27.25844 0.078697 13.41707 0.000132 0.018432 0.023635
11. Artic 5 Axle 30.46289 0.215002 12.05477 0.000114 0.016873 0.015683
12. Artic 6 Axle 33.81456 0.254183 10.9273 0.000105 0.017296 0.014056
13. Rigid + 5 Axle Dog 38.16272 0.23046 9.992665 0.000102 0.021312 0.012538
14. B-Double 41.50446 0.248591 9.264501 9.55E-05 0.021412 0.011506
15. Twin steer + 5 Axle Dog 41.00494 0.245251 9.44317 9.69E-05 0.02144 0.011646
16. A-Double 47.78389 0.213792 8.297749 9.06E-05 0.023832 0.010063
17. B Triple 50.35022 0.217325 7.908359 8.77E-05 0.024161 0.009554
18. A B Combination 54.33392 0.196344 7.363974 8.68E-05 0.026772 0.008899
19. A-Triple 58.71299 0.188315 6.781563 8.47E-05 0.028839 0.008253
20. Double B-Double 61.28954 0.192702 6.513579 8.25E-05 0.028915 0.007907

Road width = 8.5m

RF = 0

Curvature = 120° / km

Source: ARRB Group Ltd.

Table 57: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 6.430818 0.413296 12.05829 7.13E-05 0.005493 0.186733
02. Medium Car 7.817367 0.389915 14.03742 6.35E-05 0.004599 0.159215
03. Large Car 9.898382 0.428103 14.63301 5.33E-05 0.003436 0.120841
04. Courier Van-Utility 7.692486 0.125209 20.04833 9.27E-05 0.004954 0.16706
05. 4WD Mid Size Petrol 10.36996 0.357685 14.85765 7.11E-05 0.004083 0.084988
06. Light Rigid 8.114709 0.126441 14.91988 0.000142 0.011942 0.11842
07. Medium Rigid 12.5064 -0.14671 15.26244 0.000198 0.012141 0.076241
08. Heavy Rigid 23.48931 -0.1457 18.70081 0.000183 0.010893 0.028691
09. Heavy Bus 23.75106 -0.10871 17.93336 0.000147 0.009469 0.029562
10. Artic 4 Axle 27.54483 -0.31256 16.98501 0.000227 0.017068 0.030663
11. Artic 5 Axle 30.79391 -0.00859 14.17715 0.000178 0.015795 0.018493
12. Artic 6 Axle 34.19471 0.041147 12.98095 0.000165 0.016237 0.016427
13. Rigid + 5 Axle Dog 38.64359 -0.04963 12.91794 0.00018 0.020026 0.014665
14. B-Double 42.06335 -0.02236 12.10437 0.000172 0.020135 0.013392
15. Twin steer + 5 Axle Dog 41.53801 -0.04102 12.45213 0.000177 0.020122 0.013629
16. A-Double 48.29061 -0.10604 11.80937 0.00018 0.022492 0.0118
17. B Triple 50.82917 -0.09977 11.42352 0.000176 0.022859 0.011189
18. A B Combination 54.74679 -0.16904 11.51535 0.000188 0.025386 0.010482
19. A-Triple 59.06178 -0.21146 11.36175 0.000196 0.027322 0.009765
20. Double B-Double 61.60803 -0.20134 11.04583 0.000192 0.027435 0.009347

Road width = 8.5m

RF = 0

Curvature = 300° / km

Source: ARRB Group Ltd.

Table 58: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 6.491702 0.421436 12.37906 6.51E-05 0.005492 0.186578
02. Medium Car 7.868947 0.410501 14.29675 5.58E-05 0.004706 0.155039
03. Large Car 9.963608 0.45366 14.87534 4.5E-05 0.003707 0.112982
04. Courier Van-Utility 7.832269 0.213757 19.69587 5.62E-05 0.003273 0.209737
05. 4WD Mid Size Petrol 10.41163 0.449003 13.97532 4.69E-05 0.004451 0.081451
06. Light Rigid 8.194043 0.12436 17.12533 0.000105 0.008075 0.169038
07. Medium Rigid 12.99676 0.21809 10.39679 6.96E-05 0.011354 0.115936
08. Heavy Rigid 28.30358 0.154471 11.0119 3.42E-05 0.00796 0.057013
09. Heavy Bus 32.60248 0.228565 7.548896 7.54E-06 0.005175 0.050176
10. Artic 4 Axle 33.39936 -0.027 11.85291 6.2E-05 0.011762 0.051206
11. Artic 5 Axle 37.52704 0.045769 9.932212 5.12E-05 0.01116 0.043394
12. Artic 6 Axle 41.89155 0.08751 8.372325 4.27E-05 0.010967 0.038763
13. Rigid + 5 Axle Dog 49.68329 0.089869 6.958297 3.38E-05 0.011206 0.03299
14. B-Double 55.50393 0.123463 5.655572 2.53E-05 0.010672 0.029441
15. Twin steer + 5 Axle Dog 53.77065 0.107184 6.134378 2.99E-05 0.011087 0.030439
16. A-Double 70.87782 0.090232 4.637931 1.99E-05 0.010249 0.023259
17. B Triple 76.101 0.086012 4.363395 1.9E-05 0.010076 0.021702
18. A B Combination 84.65477 0.012202 4.870402 2.85E-05 0.010692 0.019903
19. A-Triple 93.68756 -0.04522 5.128339 3.82E-05 0.011146 0.018281
20. Double B-Double 99.14634 -0.04822 4.938515 3.86E-05 0.010979 0.017311

Road width = 8.5m

RF = 40 m/km

Curvature = 20° / km

Source: ARRB Group Ltd.

Table 59: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 6.493322 0.420576 12.22087 6.51E-05 0.005274 0.193604
02. Medium Car 7.872492 0.407349 14.15426 5.61E-05 0.004455 0.162052
03. Large Car 9.969471 0.448725 14.74419 4.55E-05 0.003412 0.119872
04. Courier Van-Utility 7.838735 0.213127 19.44389 5.63E-05 0.002959 0.215253
05. 4WD Mid Size Petrol 10.42136 0.437022 14.03395 4.93E-05 0.004167 0.084735
06. Light Rigid 8.195025 0.16858 16.15015 9.71E-05 0.008117 0.168629
07. Medium Rigid 12.99869 0.246486 9.633341 6.75E-05 0.010245 0.116933
08. Heavy Rigid 28.33669 0.163915 10.80028 3.37E-05 0.007627 0.056952
09. Heavy Bus 32.65292 0.219811 7.703291 1.01E-05 0.005089 0.050121
10. Artic 4 Axle 33.40959 0.05646 10.2964 4.65E-05 0.010702 0.050966
11. Artic 5 Axle 37.53559 0.11535 8.606099 4.06E-05 0.00982 0.043285
12. Artic 6 Axle 41.90111 0.1461 7.240625 3.43E-05 0.009678 0.038709
13. Rigid + 5 Axle Dog 49.69475 0.102705 6.665637 3.35E-05 0.010667 0.033009
14. B-Double 55.51692 0.115608 5.726222 2.91E-05 0.010274 0.029512
15. Twin steer + 5 Axle Dog 53.78323 0.110606 6.010958 3.16E-05 0.010577 0.030479
16. A-Double 71.56002 0.067406 4.892933 2.66E-05 0.009926 0.02313
17. B Triple 76.78857 0.064714 4.597889 2.54E-05 0.009782 0.021592
18. A B Combination 85.29855 -0.00897 5.104891 3.6E-05 0.01042 0.019823
19. A-Triple 94.30344 -0.06631 5.364557 4.66E-05 0.010892 0.018218
20. Double B-Double 99.74974 -0.06869 5.167497 4.68E-05 0.010745 0.017259

Road width = 8.5m

RF = 40 m/km

Curvature = 120° / km

Source: ARRB Group Ltd.

Table 60: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 6.50887 0.395606 11.99303 6.9E-05 0.004896 0.22141
02. Medium Car 7.911688 0.376754 13.86783 6.04E-05 0.004018 0.189019
03. Large Car 10.03082 0.417092 14.4 4.99E-05 0.002941 0.14439
04. Courier Van-Utility 7.908757 0.153452 19.18577 6.59E-05 0.002259 0.243295
05. 4WD Mid Size Petrol 10.52677 0.369651 14.3127 6.31E-05 0.00353 0.099866
06. Light Rigid 8.221647 0.188198 15.12783 9.68E-05 0.007588 0.174732
07. Medium Rigid 13.06227 0.232187 8.89884 8.02E-05 0.00832 0.121418
08. Heavy Rigid 28.70234 0.185064 10.01106 3.69E-05 0.006607 0.056523
09. Heavy Bus 33.20975 0.175593 8.061245 2.46E-05 0.004641 0.050075
10. Artic 4 Axle 33.57317 0.090655 9.511494 4.72E-05 0.009588 0.050723
11. Artic 5 Axle 37.72303 0.158172 7.640554 4.03E-05 0.008516 0.043088
12. Artic 6 Axle 42.11388 0.1725 6.561832 3.74E-05 0.008475 0.038596
13. Rigid + 5 Axle Dog 49.9594 0.081453 6.917595 4.69E-05 0.009926 0.032908
14. B-Double 55.82178 0.091411 6.044326 4.29E-05 0.009603 0.029416
15. Twin steer + 5 Axle Dog 54.07515 0.094774 6.179251 4.38E-05 0.00982 0.030361
16. A-Double 71.97696 0.02199 5.549003 4.49E-05 0.009529 0.0231
17. B Triple 77.60805 0.020778 5.199092 4.29E-05 0.00938 0.021462
18. A B Combination 86.70535 -0.05037 5.607509 5.36E-05 0.009974 0.01959
19. A-Triple 95.55213 -0.10394 5.814082 6.43E-05 0.010483 0.018051
20. Double B-Double 100.9416 -0.10482 5.599205 6.41E-05 0.010368 0.017122

Road width = 8.5m

RF = 40 m/km

Curvature = 300° / km

Source: ARRB Group Ltd.

Table 61: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 6.660659 0.383441 12.05435 6.02E-05 0.004748 0.259216
02. Medium Car 8.088164 0.362947 14.05313 5.09E-05 0.003776 0.223792
03. Large Car 10.21493 0.433193 14.14124 4.13E-05 0.003358 0.151311
04. Courier Van-Utility 8.628304 0.254692 14.78987 2.37E-05 0.003761 0.328462
05. 4WD Mid Size Petrol 10.67786 0.354199 14.35104 3.76E-05 0.002676 0.152982
06. Light Rigid 8.868398 0.100342 14.27262 6.79E-05 0.008529 0.266148
07. Medium Rigid 14.41519 0.085917 9.278373 5.93E-05 0.010135 0.167807
08. Heavy Rigid 34.54665 0.154153 8.303831 1.67E-05 0.006399 0.06815
09. Heavy Bus 40.43583 0.222189 5.431081 -4.1E-06 0.004267 0.058178
10. Artic 4 Axle 39.85896 0.063163 8.47945 2.72E-05 0.009022 0.060658
11. Artic 5 Axle 46.52422 0.092265 7.003547 2.51E-05 0.008172 0.050401
12. Artic 6 Axle 52.45046 0.110276 5.950767 2.17E-05 0.008045 0.04461
13. Rigid + 5 Axle Dog 62.31096 0.024451 6.170531 2.97E-05 0.008903 0.038382
14. B-Double 70.10879 0.031785 5.430211 2.68E-05 0.008552 0.034093
15. Twin steer + 5 Axle Dog 68.10427 0.03025 5.611995 2.78E-05 0.008778 0.035072
16. A-Double 91.3902 -0.04766 5.033767 3.52E-05 0.008133 0.026777
17. B Triple 98.94077 -0.05406 4.770973 3.6E-05 0.007935 0.024833
18. A B Combination 111.5167 -0.12552 4.913514 5.28E-05 0.008334 0.022614
19. A-Triple 124.3793 -0.18484 4.947623 7.04E-05 0.008709 0.020733
20. Double B-Double 132.0606 -0.18468 4.721459 7.1E-05 0.00854 0.019594

Road width = 8.5m

RF = 60 m/km

Curvature = 20° / km

Source: ARRB Group Ltd.

Table 62: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 6.66118 0.38597 11.83227 5.97E-05 0.00459 0.26565
02. Medium Car 8.09162 0.36214 13.8632 5.07E-05 0.003596 0.230401
03. Large Car 10.2207 0.426125 14.04099 4.18E-05 0.003159 0.158539
04. Courier Van-Utility 8.638611 0.260974 14.41565 2.2E-05 0.003549 0.333078
05. 4WD Mid Size Petrol 10.68749 0.356644 14.16712 3.79E-05 0.002397 0.154782
06. Light Rigid 8.870616 0.142956 13.25778 6.01E-05 0.007989 0.267849
07. Medium Rigid 14.41721 0.115409 8.640166 5.65E-05 0.009299 0.167948
08. Heavy Rigid 34.75485 0.146114 8.362031 1.87E-05 0.00625 0.067837
09. Heavy Bus 40.65993 0.21837 5.446216 -3.2E-06 0.004214 0.057873
10. Artic 4 Axle 40.35225 0.045768 8.556549 3.34E-05 0.00858 0.060166
11. Artic 5 Axle 46.69599 0.067883 7.304556 3.28E-05 0.007798 0.050442
12. Artic 6 Axle 52.45946 0.086464 6.280863 2.9E-05 0.007727 0.044801
13. Rigid + 5 Axle Dog 62.93881 0.000857 6.419083 3.76E-05 0.008552 0.038134
14. B-Double 70.7471 0.009179 5.676765 3.42E-05 0.008242 0.033907
15. Twin steer + 5 Axle Dog 68.70264 0.005631 5.895285 3.58E-05 0.00845 0.034892
16. A-Double 92.05697 -0.0697 5.279134 4.39E-05 0.007901 0.026669
17. B Triple 99.60275 -0.0752 5.004972 4.46E-05 0.007727 0.024746
18. A B Combination 112.175 -0.14565 5.125811 6.29E-05 0.008141 0.02254
19. A-Triple 125.0379 -0.20479 5.151179 8.22E-05 0.008525 0.02067
20. Double B-Double 132.7192 -0.20394 4.91556 8.27E-05 0.00837 0.01954

Road width = 8.5m

RF = 60 m/km

Curvature = 120° / km

Source: ARRB Group Ltd.

Table 63: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 6.671103 0.353384 11.72121 6.38E-05 0.004305 0.296659
02. Medium Car 8.130261 0.32417 13.73434 5.55E-05 0.003274 0.257727
03. Large Car 10.28149 0.383253 13.98039 4.77E-05 0.002791 0.182381
04. Courier Van-Utility 8.721555 0.234586 13.88386 2.46E-05 0.00295 0.351359
05. 4WD Mid Size Petrol 10.79231 0.325967 14.0717 4.63E-05 0.001819 0.162062
06. Light Rigid 8.90674 0.186791 11.96899 5.39E-05 0.007028 0.271206
07. Medium Rigid 14.45852 0.142413 7.796252 6.03E-05 0.008031 0.168549
08. Heavy Rigid 35.19441 0.121799 8.614031 2.87E-05 0.005787 0.067161
09. Heavy Bus 41.78446 0.203008 5.479375 3.23E-06 0.004008 0.056234
10. Artic 4 Axle 41.2539 0.011604 8.785071 4.81E-05 0.007892 0.059194
11. Artic 5 Axle 46.88105 0.034322 7.738604 4.78E-05 0.007212 0.050475
12. Artic 6 Axle 52.66982 0.055954 6.683765 4.29E-05 0.007168 0.044802
13. Rigid + 5 Axle Dog 63.47482 -0.04254 6.977474 5.58E-05 0.00808 0.037988
14. B-Double 71.50701 -0.03299 6.213738 5.15E-05 0.007801 0.033703
15. Twin steer + 5 Axle Dog 68.98461 -0.03963 6.525944 5.44E-05 0.008028 0.03491
16. A-Double 93.09581 -0.10354 5.671144 5.99E-05 0.007552 0.026476
17. B Triple 100.5787 -0.10689 5.368857 6.01E-05 0.007414 0.024601
18. A B Combination 113.0233 -0.1732 5.423315 7.92E-05 0.007862 0.022439
19. A-Triple 125.8265 -0.23133 5.429643 0.0001 0.008266 0.020593
20. Double B-Double 133.4894 -0.22954 5.180474 0.0001 0.008132 0.019477

Road width = 8.5m

RF = 60 m/km

Curvature = 300° / km

Source: ARRB Group Ltd.

Table 64: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 6.843005 0.29989 11.63124 4.83E-05 0.003534 0.445097
02. Medium Car 8.396108 0.283436 13.04597 3.72E-05 0.002766 0.386246
03. Large Car 10.49274 0.319691 14.08242 3.31E-05 0.002064 0.284781
04. Courier Van-Utility 9.721387 0.285821 11.20472 6.62E-06 0.003463 0.393865
05. 4WD Mid Size Petrol 11.32372 0.317651 12.00848 1.92E-05 0.002788 0.237287
06. Light Rigid 10.01749 0.140161 10.84775 3.94E-05 0.006965 0.320465
07. Medium Rigid 16.6881 0.124102 6.617649 3.7E-05 0.007796 0.191137
08. Heavy Rigid 40.17012 0.105414 7.650529 1.55E-05 0.00545 0.07714
09. Heavy Bus 48.93764 0.187502 4.435923 -1E-05 0.003527 0.06338
10. Artic 4 Axle 47.03696 -0.00698 8.044601 3.33E-05 0.007539 0.067528
11. Artic 5 Axle 54.51961 0.016157 6.88415 2.98E-05 0.006959 0.056987
12. Artic 6 Axle 61.83468 0.028879 5.993544 2.67E-05 0.006874 0.050191
13. Rigid + 5 Axle Dog 74.67714 -0.07871 6.254406 4.26E-05 0.007567 0.042834
14. B-Double 84.67729 -0.0718 5.581742 4.01E-05 0.007201 0.037799
15. Twin steer + 5 Axle Dog 81.75482 -0.07521 5.818556 4.06E-05 0.007474 0.039091
16. A-Double 113.0883 -0.1502 4.93549 5.74E-05 0.006704 0.02922
17. B Triple 122.907 -0.15491 4.642439 5.92E-05 0.006523 0.027043
18. A B Combination 139.354 -0.24207 4.733977 9.1E-05 0.006924 0.024691
19. A-Triple 155.9806 -0.3161 4.768328 0.000125 0.007322 0.0227
20. Double B-Double 166.0829 -0.31384 4.532479 0.000127 0.00718 0.021415

Road width = 8.5m

RF = 80 m/km

Curvature = 20° / km

Source: ARRB Group Ltd.

Table 65: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 6.843503 0.311187 11.22108 4.63E-05 0.003355 0.45123
02. Medium Car 8.399035 0.293159 12.65611 3.54E-05 0.002597 0.39161
03. Large Car 10.49838 0.323944 13.82907 3.24E-05 0.001838 0.289059
04. Courier Van-Utility 9.735065 0.28858 11.04339 5.94E-06 0.003357 0.395156
05. 4WD Mid Size Petrol 11.33932 0.320586 11.74431 1.83E-05 0.002574 0.240142
06. Light Rigid 10.02026 0.184425 9.926024 3.1E-05 0.006572 0.320354
07. Medium Rigid 16.68998 0.147204 6.155281 3.41E-05 0.007409 0.190969
08. Heavy Rigid 40.3425 0.100147 7.673981 1.71E-05 0.005338 0.076906
09. Heavy Bus 49.12072 0.1868 4.406284 -9.9E-06 0.003486 0.063176
10. Artic 4 Axle 47.46922 -0.01739 8.052259 3.82E-05 0.007233 0.067105
11. Artic 5 Axle 55.0735 -0.0028 7.041924 3.66E-05 0.006627 0.056602
12. Artic 6 Axle 62.41772 0.008696 6.188781 3.35E-05 0.006567 0.049896
13. Rigid + 5 Axle Dog 75.34548 -0.10247 6.508512 5.23E-05 0.007281 0.042577
14. B-Double 85.34317 -0.09473 5.8343 4.95E-05 0.006951 0.037616
15. Twin steer + 5 Axle Dog 82.42721 -0.09982 6.098776 5.02E-05 0.0072 0.038887
16. A-Double 113.7469 -0.17015 5.141846 6.81E-05 0.006525 0.029122
17. B Triple 123.5657 -0.17389 4.835259 6.99E-05 0.006364 0.026964
18. A B Combination 140.0128 -0.2608 4.909581 0.000104 0.006772 0.024625
19. A-Triple 156.6395 -0.33523 4.936094 0.000141 0.007174 0.022648
20. Double B-Double 166.7418 -0.33246 4.692249 0.000144 0.007043 0.021373

Road width = 8.5m

RF = 80 m/km

Curvature = 120° / km

Source: ARRB Group Ltd.

Table 66: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 6.850633 0.302709 10.62808 4.54E-05 0.003047 0.481118
02. Medium Car 8.427881 0.274598 12.09516 3.51E-05 0.002293 0.420888
03. Large Car 10.55836 0.312025 13.28676 3.3E-05 0.001502 0.306944
04. Courier Van-Utility 9.895639 0.266583 10.91513 9.99E-06 0.003018 0.396213
05. 4WD Mid Size Petrol 11.46182 0.295474 11.4256 2.2E-05 0.002062 0.249415
06. Light Rigid 10.05607 0.232052 8.829506 2.28E-05 0.006105 0.319835
07. Medium Rigid 16.73087 0.166147 5.68081 3.56E-05 0.006833 0.190571
08. Heavy Rigid 41.13544 0.076169 7.827707 2.57E-05 0.004968 0.075699
09. Heavy Bus 49.88076 0.181793 4.366817 -7.2E-06 0.003367 0.062194
10. Artic 4 Axle 48.28824 -0.0413 8.163107 5.08E-05 0.006745 0.066272
11. Artic 5 Axle 56.02333 -0.03787 7.3792 5.19E-05 0.006114 0.055904
12. Artic 6 Axle 63.40329 -0.02787 6.584284 4.87E-05 0.006092 0.049354
13. Rigid + 5 Axle Dog 76.32008 -0.13647 6.878878 6.93E-05 0.006862 0.042179
14. B-Double 86.30705 -0.12782 6.20732 6.58E-05 0.006582 0.037328
15. Twin steer + 5 Axle Dog 83.45961 -0.13599 6.519241 6.76E-05 0.006793 0.038541
16. A-Double 114.5364 -0.19693 5.424729 8.47E-05 0.006269 0.029005
17. B Triple 124.3283 -0.19932 5.09837 8.63E-05 0.006136 0.026876
18. A B Combination 140.7353 -0.28565 5.149728 0.000124 0.006564 0.024557
19. A-Triple 157.3492 -0.36082 5.169334 0.000165 0.006974 0.022594
20. Double B-Double 167.452 -0.3575 4.914559 0.000168 0.006857 0.021329

Road width = 8.5m

RF = 80 m/km

Curvature = 300° / km

Source: ARRB Group Ltd.

Table 67: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 7.400402 0.27435 9.057882 3.11E-05 0.003508 0.59533
02. Medium Car 9.244845 0.276724 9.985246 2.09E-05 0.002794 0.487639
03. Large Car 11.34047 0.292851 11.41155 1.9E-05 0.00204 0.38506
04. Courier Van-Utility 10.62315 0.30124 9.424766 -2.1E-06 0.003237 0.442821
05. 4WD Mid Size Petrol 12.48065 0.316942 9.63952 7.31E-06 0.002581 0.27934
06. Light Rigid 11.07491 0.195597 8.391925 1.67E-05 0.006231 0.356572
07. Medium Rigid 18.98699 0.134422 5.340234 2.51E-05 0.006723 0.206634
08. Heavy Rigid 46.38865 0.054034 7.277578 1.84E-05 0.004642 0.08303
09. Heavy Bus 57.90962 0.140971 4.139998 -1E-05 0.003004 0.066641
10. Artic 4 Axle 54.40387 -0.08188 7.741008 4.51E-05 0.00659 0.073154
11. Artic 5 Axle 62.98867 -0.05919 6.782378 3.88E-05 0.006073 0.062015
12. Artic 6 Axle 71.67603 -0.04859 6.01876 3.57E-05 0.005983 0.054472
13. Rigid + 5 Axle Dog 87.78566 -0.17518 6.231594 6.36E-05 0.006571 0.046213
14. B-Double 99.97769 -0.16196 5.54257 6.01E-05 0.00621 0.04062
15. Twin steer + 5 Axle Dog 96.17379 -0.16775 5.824172 5.98E-05 0.006477 0.042124
16. A-Double 135.2839 -0.24581 4.800226 9.03E-05 0.005779 0.031275
17. B Triple 147.3281 -0.24789 4.47458 9.27E-05 0.005616 0.028939
18. A B Combination 168.1839 -0.35595 4.602786 0.000152 0.00607 0.026431
19. A-Triple 189.3478 -0.4478 4.685001 0.000217 0.006449 0.024286
20. Double B-Double 201.9437 -0.44355 4.456079 0.000222 0.006314 0.022891

Road width = 8.5m

RF = 100 m/km

Curvature = 20° / km

Source: ARRB Group Ltd.

Table 68: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 7.401802 0.273919 8.756665 2.97E-05 0.003342 0.60797
02. Medium Car 9.249476 0.270127 9.798424 2.02E-05 0.002659 0.498825
03. Large Car 11.3496 0.285801 11.21226 1.84E-05 0.001901 0.39505
04. Courier Van-Utility 10.70718 0.295149 9.394596 -1.4E-06 0.003163 0.440236
05. 4WD Mid Size Petrol 12.52925 0.317388 9.460006 6.78E-06 0.002444 0.280232
06. Light Rigid 11.08096 0.204522 8.157152 1.52E-05 0.00606 0.356948
07. Medium Rigid 18.9887 0.124664 5.475966 2.8E-05 0.006523 0.206998
08. Heavy Rigid 46.50087 0.051624 7.272455 1.95E-05 0.004563 0.082902
09. Heavy Bus 58.08002 0.140767 4.108501 -1E-05 0.00297 0.066484
10. Artic 4 Axle 55.06011 -0.09882 7.829649 5.37E-05 0.006305 0.072499
11. Artic 5 Axle 63.65135 -0.08057 6.975969 4.77E-05 0.005788 0.061556
12. Artic 6 Axle 72.34027 -0.07061 6.242102 4.44E-05 0.005724 0.054141
13. Rigid + 5 Axle Dog 88.44452 -0.19801 6.468989 7.54E-05 0.006328 0.045976
14. B-Double 100.6361 -0.18374 5.771909 7.13E-05 0.006001 0.040451
15. Twin steer + 5 Axle Dog 96.8333 -0.19113 6.080694 7.13E-05 0.006244 0.041935
16. A-Double 135.9427 -0.26482 4.978743 0.000104 0.00563 0.031189
17. B Triple 147.9869 -0.26574 4.63718 0.000106 0.005485 0.028869
18. A B Combination 168.8427 -0.37489 4.755026 0.00017 0.005936 0.026382
19. A-Triple 190.0067 -0.46752 4.828272 0.00024 0.00631 0.024252
20. Double B-Double 202.6026 -0.4628 4.593326 0.000245 0.006186 0.022864

Road width = 8.5m

RF = 100 m/km

Curvature = 120° / km

Source: ARRB Group Ltd.

Table 69: Coefficients for rural (uninterrupted/free flow speed) fuel consumption model (litres per 100 km)
Vehicle typeBase fuel (l/100km)K1K2K3K4K5
01. Small Car 7.41718 0.232865 8.65607 3.2E-05 0.002823 0.648334
02. Medium Car 9.289185 0.227191 9.780091 2.31E-05 0.002282 0.528603
03. Large Car 11.42163 0.240324 11.12027 2.12E-05 0.001563 0.422469
04. Courier Van-Utility 10.95924 0.279912 9.188647 1.28E-06 0.002897 0.433984
05. 4WD Mid Size Petrol 12.66393 0.298769 9.392347 1.06E-05 0.00218 0.282367
06. Light Rigid 11.19492 0.197906 8.062212 1.82E-05 0.005709 0.354644
07. Medium Rigid 19.02887 0.107885 5.694181 3.56E-05 0.006133 0.207032
08. Heavy Rigid 47.0826 0.036959 7.32971 2.59E-05 0.004297 0.082131
09. Heavy Bus 58.67713 0.137035 4.062768 -8.5E-06 0.002869 0.065908
10. Artic 4 Axle 55.83263 -0.12107 7.948376 6.76E-05 0.005915 0.071778
11. Artic 5 Axle 64.52 -0.11032 7.251788 6.29E-05 0.005378 0.060958
12. Artic 6 Axle 73.23695 -0.10205 6.569634 5.96E-05 0.005342 0.053687
13. Rigid + 5 Axle Dog 89.26285 -0.22815 6.790303 9.38E-05 0.005987 0.045672
14. B-Double 101.439 -0.21272 6.084114 8.89E-05 0.005704 0.040241
15. Twin steer + 5 Axle Dog 97.67962 -0.22234 6.430972 8.96E-05 0.005912 0.04168
16. A-Double 136.6621 -0.29009 5.222857 0.000124 0.005423 0.031099
17. B Triple 148.698 -0.28963 4.860205 0.000126 0.005303 0.0288
18. A B Combination 169.5518 -0.40054 4.967801 0.000197 0.005754 0.026332
19. A-Triple 190.7166 -0.49442 5.030725 0.000274 0.006125 0.024217
20. Double B-Double 203.313 -0.48916 4.787312 0.000279 0.006014 0.022838

Road width = 8.5m

RF = 100 m/km

Curvature = 300° / km

Source: ARRB Group Ltd.