LowEmissionAsphalt-136pg-WhitePaper-May2023

P a g e | 90 Ride Quality Not new to road-related environmental opportunities for the paving industry is ride quality or pavement “smoothness” as it is a pavement vehicle interaction (PVI) which can have an impact on reducing overall transportation sector energy use and microplastic accumulations (tire-wear). It must balance with roadway safety considerations first, of course. Pavement smoothness is important to the traveling public as rougher pavements can increase both types of vehicle operating costs (fuel and tires). They are important to agencies as ride quality impact on the environment is potentially manageable meaning some climate and air quality savings are available and why they are included in paving construction and maintenance EPD use phase calculations . PVI-roughness is estimated to be as much as 10% of cradle-to-grave GHG emissions for AC and 16% for PCC. 191 (Figure 58) Figure 58 – Lifecycle GHG Emissions Per CLM | 13” HMA | 20” PCC (In Kt CO 2 e) Source: MIT CSHub; BlackwallPartners LLC 191 MIT CSHub. -2 0 2 4 6 8 10 Asphalt Concrete Carbonation PVI-Deflection PVI-Roughness Radiative Forcing Maintenance Construction