But that is not the end of the case. However reasonable the charge may appear to be on its face the ultimate question must be whether it is in fact reasonable at the time it is imposed. The owner may be required to pay a sum which could not in fact bear any real relation to the wear and tear caused to the highways by the particular journeys. In that case the charge could not be reasonable compensation for the damage suffered and would impose an undue burden on inter-State trade. The relation between the amount of the charge and the damage done to the highways must therefore be examinable. In the present action evidence was given on this issue. It proves to my mind that the amount of the charge produced by the operation of the formula in the fourth schedule is in fact reasonable. I shall not refer to the evidence in any detail. It consists mainly of the estimates contained in exhibit 1 and exhibit B and the oral evidence of Mr. Hosking the planning and research engineer of the Country Roads Board of Victoria. These estimates show that the annual sum required to maintain the whole of the Victorian roads in proper order and repair in the year 1954-1955 was £15,148,000. The whole of this sum was not in fact expended. Only £12,648,000 was spent and a further expenditure of £2,500,000 was required to complete the work. The total length of the Victorian roads is 80,000 miles of which 3,850 miles are classed as State highways and 9,789 miles as main roads. The expenditure required for the maintenance of State highways was at the rate of £560 per mile and the expenditure required for the maintenance of main roads at the rate of £325 per mile. The expenditure required for the maintenance of the whole of the Victorian roads was £190 per mile. Exhibit 1 divides the total number of motor vehicles registered for Victoria in March 1955, that is 559,000, into ten classes which can broadly be divided into two sub-classes, the first sub-class comprising private cars, business cars, trucks with a nominal carrying capacity of under two tons and trucks with a nominal carrying capacity of two to three tons and the second sub-class comprising (e) trucks with a nominal carrying capacity of three to four tons, (f) trucks with a nominal carrying capacity of four to five tons, (g) trucks with a nominal carrying capacity of five to six tons, (h) trucks with a nominal carrying capacity of more than six tons, (i) semi-trailers and (j) 'buses. There are 34,000 vehicles in classes (e) to (j). These classes comprise the vehicles the weight of which causes considerably more damage to the roads than vehicles in the first sub-class and this damage increases rapidly as the weight increases. After an examination of the estimated average annual mileage of vehicles in each class, the average gross weight of vehicles in each class, the average load carried by vehicles in each class expressed as proportion of load capacity and the cost of construction of roads designed to carry (a) axle loads in excess of 8,000 lbs. and up to 17,000 lbs. (the highest permissible load in Victoria) and (b) axle loads up to 8,000 lbs., it was estimated that the maintenance costs attributable to vehicles with permissible axle loads in excess of 8,000 lbs., that is the vehicles in classes (e) to (j), was 62% of £15,148,000, that is 9.4 millions. But the only vehicles subject to the charge imposed by s. 26 of the Commercial Goods Vehicles Act are those in classes (f) to (i) inclusive and of this 9.4 millions 7.4 millions is attributable to the vehicles in these classes. After allowing for the amounts paid by the Commonwealth to the State of Victoria under the Federal Aid Roads Act towards the construction and maintenance of Victorian roads (half this amount being allocated in the estimates to maintenance and the other half to construction) and for the registration fees payable under the Motor Car Acts the amount of maintenance cost expressed as pounds per vehicle in each class was for class (e) £121, (f) £156, (g) £248, (h) £296, (e) £486 and (j) £346. These amounts expressed in pence per ton-mile were (e) 0.37, (f) 0.37, (g) 0.38, (h) 0.39, (i) 0.41 and (j) 0.39. As a third of a penny per ton-mile is 0.33 and this figure is below any of these amounts it cannot be said that one-third of a penny per mile is an unreasonable amount to include in the fourth schedule. Exhibit 1 shows that the amount actually collected under Pt. II of the Commercial Goods Vehicles Act for the period 1st April 1956 to 28th February 1957 was £1,083,182 and that it was estimated that the amount which would be collected in the first twelve months of the operation of the legislation if all due payments were made in accordance with the Act was £2,015,000. As the total expenditure required for the maintenance of the Victorian roads was £15,148,000 the truth of the statement in s. 26 of the Commercial Goods Vehicles Act that the charge is towards compensation for wear and tear caused by vehicles to public highways in Victoria becomes very apparent. And it becomes even more apparent when a dissection of the 7.4 millions of the expenditure for maintenance attributable to the vehicles in classes (f) to (i) inclusive indicates that after deducting from this sum the proper allowances for registration fees, Commonwealth grants, estimated collections under s. 26 and estimated amounts for third schedule exemptions, there remains a discrepancy of 3.9 millions, this sum representing the extent to which damage done to the roads by the vehicles in these classes is not recouped from the charges imposed by s. 26 and must be borne by the general revenues of the State.