. Ontario Sessional Papers, 1907, . aterial in the centre of theroad. (2) Rolling saves the gravel and stone; the sides of the road are notcut up by traffic, and the surface of the roads permits better drainage asruts and wheel tracks hold water. 1907 HIGHWAY IMPROVEMENT. 59 (3) A roller should be used on earth roads and on gravel roads, but ismost useful on stone roads. (4) The earth sub-grade should always be rolled—not merely the sur-face of gravel or stone. When this is done, less rolling is needed and abetter road results. (5) Kolling should commence at the sides and gradually ap
. Ontario Sessional Papers, 1907, . aterial in the centre of theroad. (2) Rolling saves the gravel and stone; the sides of the road are notcut up by traffic, and the surface of the roads permits better drainage asruts and wheel tracks hold water. 1907 HIGHWAY IMPROVEMENT. 59 (3) A roller should be used on earth roads and on gravel roads, but ismost useful on stone roads. (4) The earth sub-grade should always be rolled—not merely the sur-face of gravel or stone. When this is done, less rolling is needed and abetter road results. (5) Kolling should commence at the sides and gradually approach thecentre. To roll the centre first, crowds the loose metal out and flattens thecrown. (6) To drive a roller up and down a road a couple of times is not roll-ing. Rolling means the continued use of the roller until the road is thor-oughly consolidated. A sprinkling cart should precede the roller, or thework should be done just after a rain. (7) Towns, cities and counties should use steam rollers. Townshipsshould have horse Concrete Arch, Simcok County. Koad rollers are now regarded as an unobtainable luxury by most town-ships. This feeling must pass away when their value and usefulness arebetter known. Eolling adds something to the cost of a road, but it alsoadds very much more to the durability and usefulness of the road. It savesthe metal, compacts it into a solid bed where it is needed, makes a smoothand well crowned surface. A number of townships are using horse rollers, while both horse andsteam rollers are being used on county road systems. The county councilof Wentw^orth has bought a second steam roller for use on the county is the result of two years experience with the roller first purchased,and is a very emphatic method of endorsing the use of rollers in road con-struction. A road should first be properly graded, crowned and drained. Theroller should then be used to consolidate this earth sub-soil so that the gravel 60 REPORT ON No. 31 or
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