Metra Contracts A set of files from the Data Transparency Portal listing Metra's contracts by year. Data is available from 2015 through the current year. An updated version of the most recent file is sent to the RTA by Metra staff on a monthly basis. PO Number: An internal idefication number for the contract Vendor: The name of the contract's vendor PO Amount: The monetary value of the contract Description: A short description about the contract