The effects of freezing and thawing can be attenuated by improving pavement drainage. Different drainage systems are available, but their effectiveness in cold regions has not yet been demonstrated. An evaluation of some of these, begun in a previous project, should be continued to provide conclusive results. Thermoplastic pipes proved the most chemically stable for drains in corrosive milieux. Additional studies are required to evaluate the possibility of ice forming inside pavement edge drains and filter seals.
Drainage has little effect on frost heave in the soil beneath infrastructures.
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