Density’s Parking Impact

The City of Portland has approved numerous massive four- and five-story apartment buildings in neighborhoods of single-family homes separated by streets of single-story shops. These buildings stress the infrastructure built to handle a smaller population, which is most obvious in the increased traffic and parking problems–especially since many of the buildings are designed without parking.

Despite Portland’s reputation as a car-free city, I can attest that neighborhoods that once had few cars parked on the streets are now jammed with cars, indicating far more cars per housing unit than there were a few decades ago. The introduction of apartments lining the business corridors of these neighborhoods has led to huge increases in congestion, which isn’t helped by the fact that the city carefully keeps most signals uncoordinated so that people now frequently drive on neighborhood streets to avoid stopping at frequent red lights.

To allay concerns that the apartments were taking parking away from existing homes and businesses, the city just published a report reviewing the parking situation around eight recent buildings. Four of these had about two-thirds of parking space per dwelling unit on site, while the other four had no on-site parking (page 3). The city’s report found that, even during peak periods, at least 25 percent of on-street parking within two blocks of these buildings was vacant (p. 2).

That was enough to lead the Oregonian to headline its story about the report, “City study finds increase in no-parking apartments but little neighborhood parking impact.” There’s more to the story, however.

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