Unified Soil Classification (USC)
Unified Soil Classification (USC) : Natural Disaster. Classification of soil on the basis of its texture and liquid limit. The system comprises 15 soil groups, each identified by a two-letter symbol, the first symbol representing the type of soil and the second symbol indicating the plasticity of the soil. uninterrupted flow Condition of traffic flow on a road in which there are no factors external to the traffic stream which affect its flow
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