Assessment of Heavy-Duty Natural Gas Vehicle Emissions: Implications and Policy Recommendations

This report describes how recent assessments indicate natural gas vehicles could constitute up to 20 per cent of the new 2025 heavy-duty vehicle market, potentially displacing a significant number of diesel vehicles. The report explains the ways in which the U.S. heavy-duty vehicle "Phase 2" greenhouse gas rule-making can influence the new fuel/engine technology and its deployment in the fleet.