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The field density test is crucial in highway and traffic engineering as it assesses the compaction quality of soil and aggregate materials used in road construction. Proper density ensures that the pavement structure can support traffic loads, preventing issues like deformation and cracking. This test also helps in evaluating the effectiveness of the construction process and ensuring compliance with design specifications, ultimately contributing to the road's durability and safety. Regular density testing is essential for maintaining long-term performance and reducing maintenance costs.

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