PJM Interconnection LLC announced $1.2 billion in upgrades to its Mid-Atlantic and Midwest system on October 3. President and CEO Terry Boston said that the upgrades will focus on addressing severe weather challenges and the shift from coal to natural gas. Its 62,556 miles of transmission lines cover DE, IL, IN, KY, MD, MI, NC, NJ, OH, PA, TN, VA, WV, and Washington, DC.