<p>Unpredictable weather and growing traffic demand new technologies in pavement design and material selection. This paper introduces a case study where a Graphene-enhanced plastomeric Polymeric (GP) asphalt modifier with recycled plastic base was used in a surface and binder course in Oxfordshire, the UK. The manuscript presents pre-qualification, post-production, and pavement condition monitoring results after more than 5&#xa0;years in service. According to the obtained test results, introducing the asphalt modifier enhanced the stiffness properties and resistance to permanent formation for both the Stone Mastic Asphalt (SMA) surface course material and Asphalt Concrete (AC) binder material. As far as fatigue performance is concerned, while the SMA surface course material containing the asphalt modifier showed superior performance compared to its counterpart, the AC binder material exhibited slightly lower performance but maintained compliance with the technical specifications. In addition to the laboratory-scale tests, systematic condition monitoring of the pavement and a Falling Weight Deflectometer (FWD) analysis confirmed the performance of the GP-modified mixtures under real scale load and climatic conditions. Based on the structural capacity results and condition observations, the GP-modified pavement offered superior structural performance compared to the control pavement section built with standard materials, giving a significantly higher service life. In addition to the material performance properties, the tested asphalt modifier, a compound of selected recycled plastics (not plastic bags, water bottles, etc.), gave significantly lower embodied carbon, attested via an Environmental Product Declaration (EPD), compared to common Styrene-Butadiene-Styrene (SBS) asphalt modifier.</p>