U.S. gasoline prices have dropped to their lowest levels in four years, and they are almost sure to go lower as oil prices plunge. Price-tracking services put the national average Monday around $2 a gallon . Some stations were spotted charging under a dollar. But don’t expect a stampede to the pumps. Demand is weak because so many Americans are under shelter-in-place rules and businesses have been shuttered because of the coronavirus outbreak. “For most Americans who are home practicing social distancing and not driving to work or taking their children to school, you are only filling up maybe once a week, maybe every couple of weeks,” said Jeanette Casselano, a spokeswoman for the AAA auto club. “You are not reaping the benefits.” Prices have plenty of room to keep falling — maybe below $1.50, according to analysts. Patrick DeHaan, an analyst for price tracker GasBuddy, […]