Agricultural Trucking Relief Act of 2019 This bill revises regulations related to the transportation of agricultural commodities. Specifically, the bill expands the definition of agricultural commodity to include (1) aquaculture, horticultural, and floricultural commodities; (2) fruits; (3) vegetables; (4) any non-human living animal and the products thereof; and (5) other agricultural products that are sensitive to temperature or climate and at risk of perishing in transit. (Under current law, an agricultural commodity means any agricultural commodity, non-processed food, feed, fiber, or livestock.)