As performance expectations and the design life continue to be increased for jointed plain concrete pavements (JPCP)s, it is important that the joints of the pavement meet these demands. The joint must also be properly sealed or it can serve as an entry point for moisture, deicing salts and incompressibles. This can lead to durability issues, erosion, pumping, faulting, spalling and blow-ups. Sealant performance is influenced by sealant material, joint reservoir design, and the timing and quality of the installation. A discussion on a holistic approach to joint design is provided along with an in-depth analysis on sealant and joint performance (Appendix A and B) and reservoir design (Appendix C) for JPCPs with 15-ft joint spacings. An extensive laboratory study was performed to evaluate three joint design/material combinations subjected to simulated joint opening/closing and vehicle load fatigue for a 42-year design life of a 15-ft JPCP (Appendix D). It was determined that Type II asphalt-filled and sealed reservoir designs exhibited greater cohesive and adhesive damage and were less watertight than the silicone sealed reservoir design after the 42 years of simulated service life.