This in-depth overview explores the novel utilisation of waste plastic in construction materials and infrastructures focusing on roadways and concrete. The study includes a variety of investigations carried out over the previous few years, each of which adds insightful information about the environmentally friendly integration of plastic waste. Researchers have looked into a number of approaches, including using plastic waste in concrete or asphalt mixtures in place of conventional materials like bitumen, coarse aggregates, and fine aggregates. Plastic waste has possible advantages like greater workability, decreased shrinkage from plastic and drying, improved abrasion resistance, and cost savings, but it also has disadvantages like weaker compressive and tensile strengths.