CROSSINGS

A wide-ranging, fascinating exploration of roads, which are “not merely a symptom of civilization but a distinct disease.”

Goldfarb’s follow-up to Eager, his award-winning book on beavers, is another illuminating, witty work. He chronicles his journeys through numerous countries with colleagues to conduct extensive field research and mixes his findings with historical research showing the effects of roads on our ecology. Pavement, he writes, “blankets less than 1 percent” of the U.S., “but its ecological influence “covers a full 20 percent.” Goldfarb sadly notes that it “has never been more dangerous to set paw, hoof, or scaly belly on the highway.” With the rise of cars and roads in the 20th century, the degrading word roadkill was born, and the deer became primary victims. The author bemoans how the “Interstate Highway System lopped off migration routes as neatly as a guillotine,” and roads with more than 10,000 vehicles per day loom as what road ecologists call “absolute barriers to most wildlife.” The sprawling Los Angeles freeway labyrinth, with its “clean as a scalpel” east-west habitat fragmentation, has disrupted practically every species, especially the mountain lion. As a result of roadkill, Goldfarb sadly notes, 21 critters, especially reptiles and amphibians, face extinction, and he reveals how the National Forest Service’s many roads have become “proxy battlegrounds in a cultural war” and how they’re working to reduce them. Excessive road noise is equally pernicious, as is excessive salt on roads. Not to be overlooked, usually on a car’s front, is the ongoing insect liquidation, but many shrubby roadsides have also become insect sanctuaries. “The necrobiome,” Goldfarb writes, “airbrushes our roadsides, camouflaging a crisis by devouring it.” Fortunately, in Europe and Canada, recent innovations in under- and overpasses have helped reduce the number of dead animals, and the author is optimistic about the roles of citizen scientists, self-driving cars, and achievements in Brazil, which “seem[s] to sit at road ecology’s forefront.”

An astonishingly deep pool of wonders.