Not long ago, it would have been the rare investor who looked at bridges, roads, airports, cell towers, and other large bulky edifices and thought, “That looks like something I should add to my retirement portfolio.” But after months of hearing about the proposed $2 trillion (now $1 trillion) of infrastructure investment being bandied about in Congress, and reading almost daily of bridges and roads needing repairs to prevent collapse — a 2021 report by the American Society of Civil Engineers found that more than 20,000 concrete bridges across the United States are structurally deficient and nearly half the nation’s public roadways are in “poor” or “mediocre” condition — investors are beginning to realize that infrastructure assets might present a very attractive opportunity.