In this webinar, Professor David W. Coit presents a new reliability model based on a two-stage gamma process model, developed for steel rebar corrosion under accelerated conditions. Deterioration of concrete structures is a major concern and corrosion of steel reinforcement is among the major causes. The corrosion process aggressiveness increases with the existence of cracks that facilitates the transfer of chloride and accelerates the steel erosion and that affects the structure’s service life negatively. The Rutgers Infrastructure Monitoring and Evaluation (RIME) Group, led by Prof. Hani Nassif, has conducted extensive testing of steel rebars in concrete test samples. In Professor Coit’s study, the corrosion rate of four major types of embedded steel rebars is being investigated through the accelerated corrosion testing. To simulate the service environment expected in bridges, the specimens were pre-cracked and subjected to diluted and concentrated chloride solutions. The testing program took into consideration two common types of concrete (Class A & high performance concrete), four cracking patterns and two chloride concentrations (3% and 15%). The cracking patterns combine two crack widths (0.011 inch and 0.035 inch) and two crack depths (0.5 inch and inch). After collecting data for three years, a two-stage degradation model was applied to understand and analyze the corrosion process for the fours rebars under the different conditions presented. The testing time of pre-cracking samples was mathematically translated for uncracked bridge rebar evaluation. The results obtained in this paper demonstrated the effectiveness of pre-cracking-induced concrete on performing accelerated corrosion testing.