Streetsblog’s Parking Madness competition has highlighted the blight that results when large surface parking lots take over a city’s downtown. Even though Rochester, winner of 2014′s Golden Crater, certainly gains bragging rights, all of the competitors have something to worry about: Cumulatively, the past 50 years of building parking have had a debilitating effect on America’s downtowns.
Streetsblog recently spoke with Chris McCahill of the State Smart Transportation Initiative in Madison, Wisconsin, to learn about his research into how parking affects small cities’ downtowns. Most recently, McCahill and his co-authors have shown how policy makers’ preoccupation with parking not only hollows out city centers, it also decimates the downtown tax base.
McCahill began his analysis as a University of Connecticut Ph.D. student in 2006, choosing to compare the postwar evolution of six small, built-up, relatively slow-growing cities: Arlington, Virginia; Berkeley, California; Cambridge, Massachusetts; Hartford, Connecticut; Lowell, Massachusetts; and New Haven, Connecticut. For each of these cities, McCahill and his collaborators, most frequently professor Norman Garrick, have gone far beyond the usual publicly available statistics and hand-measured the number of parking spaces (both on- and off-street) and the size of buildings from aerial photos.
The resulting analysis shows how three of these cities have diverged from the other three since the base year of 1960. Arlington, Berkeley, and Cambridge went against the postwar grain and chose a “parking-light” approach: emphasizing transportation demand management (TDM) measures, while de-emphasizing driving and in one case even penalizing parking construction. Hartford, Lowell, and New Haven chose a conventional approach, emphasizing that downtown development should provide “adequate” parking based upon standards of the time.
These two paths led these cities to very different outcomes, which McCahill has chronicled in a series of publications. Most recently, he co-authored two papers about how parking has affected the six downtowns’ urban fabric and their tax bases. Parking lots take a big bite out of the conventional cities’ tax bases, which could reap 25 percent more in downtown property taxes had they chosen a parking-light approach instead.