Acronyms

PAC: Payment Administration Center

PC: Personal Computer

PCA: Pre-crash Actions

PCB: Professional Capacity Building

PCS: Personal Communications System

PDA: Personal Digital Assistant

PDF: Portable Document Format

PDU: Protocol Data Unit

PER: Packet Error Rate

PHY: Physical

PIAS: Personal Information Access Subsystem (legacy National ITS Architecture)

PID: Personal Information Device

PIF: Public Interest Finding

PII: Personally Identifiable Information

PIN: Personal Identification Number

PKI: Public Key Infrastructure

PM: Performance Monitoring, Particulate Matter

PMS: Parking Management Subsystem (legacy National ITS Architecture)

PNG: Portable Network Graphics

POC: Proof of Concept

PPG: Privacy Protection Gateway

PRL: Protocol Requirements List

PSAP: Public Safety Answering Point

PSID: Provider Service Identifier

PSPEC: Process Specification

PTI: Planning Time Index

PTS: Positive Train Separation or Public Travel Security

PTVCW: Pedestrian in Signalized Crosswalk Warning