Final answer:
The two states in the lower 48 United States with no Amtrak tracks are Rhode Island and Vermont.
Step-by-step explanation:
The two states in the lower 48 United States with no Amtrak tracks are Rhode Island and Vermont. Rhode Island is the smallest state by population, and Vermont borders Rhode Island.
Vermont, New Hampshire, and Maine have always been less populated than the southern New England states, and Maine is the least populated state in the region.
About 90 percent of Maine's land is forested, making it the most forested state in the United States. The vast Empty Quarter in western Maine consists of five million acres of privately owned forest and no permanent human inhabitants.