This report seeks to quantify and track the number of deployed Class 2b (8,501-10,000 lbs.) to Class 8 (33,000 lbs. and above) on- and off-road ZETs over time, providing a forward-looking summary of near-term, imminent deployment commitments that will be updated periodically as the commercial ZET market grows (Table ES-1). The number of vehicles cited in this report will change frequently, but the intent is to accurately capture the correct quantities and deployment stage at the time of writing. Many ZETs now in demonstration and pilot phases are providing the critical “first look” for early adopters and potential fleet buyers. This report captures both these longer demonstrations as well as commercial sales of ZETs.