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Idea to send:	Topic Use a Different Sub-Base for Road Construction Content Require use of aggregate (crushed stone) sub-base for all new roads, whether concrete or asphalt. More expensive than sand or soil sub-base at time of initial installation, but wears better and weathers better over life of roadway, and is recyclable when road is replaced. Would make for a better, safer road system for longer period of time, and would save on expense (frequency and cost) for road repairs.