PERPETUAL PAVEMENTS National Director of the APA. “Asphalt roads can be engineered to last indefinitely with only routine maintenance and periodic surface renewal.” For the second time in recent years, VDOT’s Salem District won a PPA by Performance for a segment of Interstate 81. Most of I-81 in Montgomery County was constructed in the early to mid 1960s. This specific two-mile section (milepoint 109.8 to 111.8) was built with with 9.0" of Select Material (CBR 30), 6.0" Subbase Stone, 7.5" Base Mix Asphalt, 1.3" Intermediate Mix Asphalt, and 0.75" Surface Mix Asphalt. Despite poor subgrade and weather conditions, this section of I-81 has withstood over 56 years of heavy truck loading (103,043,000 equivalent single axle loads over its lifetime) with minimal maintenance. All one has to do is drive along Virginia’s I-81 corridor to be amazed at the performance of this roadway. Though not originally designed for the level of traffic it experiences each day, most of the corridor continues to perform at or near Perpetual Pavement standards. Ken King, P.E., Salem District Engineer spoke for the VDOT by reflecting on the honor of being selected for the APA’s 2022 Perpetual Pavement Award. “This recognizes the quality work and accomplishments of generations of VDOT and industry contributors to the pavement program in Virginia.” “Several years ago, we made a concerted effort to celebrate the past and the future of Virginia’s pavement through the perpetual pavement program,” echoed Virginia Asphalt Association President Trenton Clark. “The I-81 and I-64 projects do just that. Both are shining examples of resilience and sustainability of asphalt.” PPA by Performance winner: Interstate 81 two-mile section (milepoint 109.8 to 111.8). VAASPHALT.ORG 19
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