Regenerative braking systems represent an innovative technology in automotive engineering, offering enhanced energy efficiency and sustainability through the recovery of kinetic energy during braking. Compared to traditional braking mechanisms, regenerative braking is particularly useful for electric vehicles due to their ability to recharge batteries recharging with restored kinetic energy. This paper is structured to present a problem definition, literature review, and engineering design, along with a discussion of regenerative braking system (RBS) working principles, types, and applications. Additionally, the application of the Theory of Inventive Problem Solving (TRIZ) methodology in the design and optimization of regenerative braking systems is evaluated. TRIZ provides a systematic approach to innovation by identifying contradictions and resolving them through inventive principles and solutions. This paper aims to perform a detailed analysis through a case study to enhance the efficiency, reliability, and performance of regenerative braking systems for sustainable transportation solutions. The conceptual design of a regenerative braking system was performed and a small-scale prototype replicating the dynamics of the system was manufactured to validate the proposed design methodology. Experimental validation of the proposed design showed that almost 14 percent of the kinetic energy can be easily recovered during braking and reused for recharging the battery of an electric or hybrid vehicle.