1. Railroad Facts 2020 (No. A66–7305);AAR,2020
2. FY 2018 Company Profile for the Period October 1, 2017 - September 30, 2018;Amtrak,2018
3. FY21–26 Five Year Service and Asset Line Plans;Amtrak,2020
4. Delayed by Freight - Measuring on-Time Performance across our Network [WWW Document];Amtrak,2022
5. Compendium of Definitions and Acronyms for Rail Systems (No. APTA STD-ADMIN-GL-001-19);APTA,2019