PPP in public transport in the US: FTA launches NPRM to spur private investment September 1, 2017 | Policy Review On July 31, 2017, the Federal Transit Administration (FTA) announced Notice of Proposed Rulemaking (NPRM) for the Private Investment Project Procedures (PIPP), which aims to remove impediments for pub... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password