Potential Impact of Exempt Vehicles on HOV Lanes

APPENDIX E—LIST OF DEFINING TERMS (ACRONYMS)

AASHTO: American Association of State Highways and Transportation Officials

ADA: Americans with Disabilities Act

AFV: Alternative Fueled Vehicles

AVO: Average Vehicle Occupancy

CFR: Code of Federal Regulations

CMAQ: Congestion Mitigation and Air Quality Program

CNG: Compressed Natural Gas

EMS: Emergency Medical Services

EPA: Environmental Protection Agency

FHWA: Federal Highway Administration

FTA: Federal Transit Administration

HOT: High-occupancy Toll

HOV: High-occupancy Vehicle

ILEV: Inherently Low Emission Vehicle

ISTEA: Intermodal Surface Transportation Efficiency Act

LNG: Liquified Natural Gas

LPG: Liquified Petroleum Gas

MPH: Miles Per Hour

NAAQS: National Ambient Air Quality Standards

NEPA: National Environmental Policy Act

PZEV: Partial Zero Emission Vehicle

SAFTEA: Safe, Accountable, Flexible, and Efficient Transportation Equity Act

SULEV: Super-Ultra Low Emission Vehicles

TEA-21: Transportation Equity Act for the 21st Century

VPHPL: Vehicles Per Hour Per Lane