Milford Proving Ground opened 25 September 1924, when the GM President was Alfred P. Sloan, Jr. The facility was developed to analyze vehicles under controlled conditions. New vehicle testing methods developed during this period included the evaluation of vehicle speed, handling, fuel economy, durability, brake effort, hill climb, and safety. New crash and rollover tests were developed to evaluate damage to vehicles and enhance passenger protection. Maurice Olley, a GM engineer who was an early pioneer in ride and handling technology, introduced the concept of formal suspension and chassis analysis by studying the human body’s response to vehicle inputs.