The eight papers in this volume provide information on environmental effects on transportation facilities, such as pavements, airports, and embankments. The papers are arranged into two groups. The first five papers treat the evaluation of environmental moisture effects on the stability of transportation facilities. These papers describe methods of using soil moisture characterizatin in solving practical problems such as evaluation of vertical moisture barriers and the effects of moisture on resilient moduli of coarse and fine grained soils. The three papers that follow describe the performance of transportation facilities constructed of nonearth materials for controlling frost heave. Because such applications may be cost-effective solutions to this problem, field implementations should be based on a basic understanding of the differences in the thermal properties of various nonearth and common earth materials. These papers are a source of such information.
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