The U.S. National Transportation Safety Board (NTSB) said on Wednesday it was opening an investigation into a March 3 fatal crash between a Ford Mustang Mach-E and two stationary cars on the I-95 interstate highway in Philadelphia. In March, the NTSB said it was investigating the use of an advanced driver assistance system in a Ford Mustang Mach-E that was involved in a Feb. 24 fatal crash in San Antonio, Texas in which the Mach-E struck rear of a Honda CR-V that was stationary in a traffic lane on Interstate Highway 10.