Some more info and photos can be found here (PDF warning): https://www.apta.com/wp-content/uploads/Resources/mc/rail/previous/2017rail/presentations/Presentati

Some more info and photos can be found here (PDF warning): https://www.apta.com/wp-content/uploads/Resources/mc/rail/previous/2017rail/presentations/Presentations/Holland,%20Ben.pdf https://www.apta.com/wp-content/uploads/Resources/mc/rail/pr... https://www.bart.gov/sites/default/files/docs/New%20wheel%20profile%20Nov%202018%20R4.pdf https://www.bart.gov/sites/default/files/docs/New%20wheel%20...