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Combining vehicle-trajectory and detector data improves density estimation.
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Getting manufacturers involved in managing hazardous household waste.
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Caltrans develops a low-cost repair method using high-tech emulsion and recycled asphalt.
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Contract specifications help San Diego avert fines related to California's disposal reduction targets.
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Low-sodium budget
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A new generation of engineers is learning why their predecessors specified more than 5 billion feet for the nation's sewers.
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More on crosswalks, detectable warnings, and direction changes