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Not all Access Lanes will fit the criteria for use of grassed swale drainage systems; some may <br /> not be in an area that is suitable for grassed swales; others may have safety issues which <br /> would require standard curbs. <br /> Inverted curbs will also be required on private alleys paved with asphalt rather than concrete. <br /> The inverted curb will permit the alley to be constructed with a crown allowing water to drain <br /> to the side of the alley, and,.again, will prevent the asphalt street edge from breaking down. <br /> Rolled Curbs Typically, rolled curbs are shorter and less vertical than the standard curb. <br /> While some consider them more aesthetically pleasing than standard curbs, rolled curbs do not <br /> contain and channel stormwater runnoff as effectively, and do not prevent vehicles from <br /> parking on planting strips and sidewalks. In addition,' rolled curbs do not have sufficient height <br /> to contain drainage pipes that carry water from roof drains to the steet gutter. This plan <br /> recommends a modified rolled curb which maintains a height necessary to accommodate roof <br /> drainage pipes and to contain stormwater runoff in the gutter, but has a more rounded top and <br /> bottom and presents a "softer" appearance than the standard curb. <br /> * *INSERT DRAWINGS OF BOTH CURB TYPES ** <br /> r <br /> 33 <br />