The intention for resolution is to determine the winner based on fraction of trucks sold in the USA in 2030. There are currently very few non-diesel long-haul systems deployed, so I don't yet know what source will provide data on truck sales by power type, but I expect it will be a group like the US Energy Information Administration providing a chart similar to this one:

https://www.eia.gov/todayinenergy/detail.php?id=60321

Placing resolution date as March 1 2031 to allow time for collection of sales statistics for 2030.

If a novel technology is developed between now and 2030 that looks to be a contender for becoming the dominant power source for long-haul trucking, I'll add the technology to the options.