The Virginia Transportation Research Council is investigating a new bridge overlay intended to reduce the build-up of ice and snow on driving surfaces. The epoxy overlay includes a 10mm aggregate layer that slowly releases de-icing chemicals. The limestone aggregate allows salt-brine solution to “penetrate the pores of the aggregate like a sponge” said to VTRC materials associate director Michael Sprinkel. VTRC is evaluating the technique this winter and next on behalf of Virginia Department of Transportation.