The Federal Transit Administration's (FTA) State Safety Oversight Rule (49 CFR Part 659) requires oversight for all rail transit agencies in revenue operation after January 1, 1997. This report summarizes activities performed to implement the State Safety Oversight Program during Calendar Year 1999. Information provided by State Oversight Agencies documenting the safety and security performance of the rail transit industry in 1999 is presented, including a discussion of the probable causes of accidents and unacceptable hazardous conditions. This report also highlights procedures and policies, developed by State Oversight Agencies and rail transit systems, which have been particularly effective in supporting the objectives of the State Safety Oversight Program.