Thursday, March 31, 2016

Does the End of Privately-Owned Cars Mean the End of Parking ?

The High Cost of Minimum Parking Requirements (27 page pdf, Donald Shoup, Transport and Sustainability, 2014)

Also discussed here: Autonomous cars and the end of parking (Scott Forman, sjforman, Feb 21. 2016)

Today we review an intriguing column that looks at the problem presented in many cities by mandated indoor parking requirements and outdoor parking spaces that create as much as 40% of the paved urban surface area- as well as requiring the use of carbon-based asphalt in their construction and maintenance and an added building cost of $32K per space. One result of autonomous, self- driving cars could be no need for parking spaces, especially privately-owned ones, as the robot cars will continue to move around the city to meet demand and, when not needed, will simply drive to unused parking spaces in the outskirts.  Talk about killing two birds with one stone- end vehicles emissions with electric robot cars and make much better use of the wasted space now solely dedicated to parking.


Key Quotes:

“As of today, there are something on the order of 250 million cars in the United States alone. There are also around 800 million parking spaces.”

“in most American cities, parking is actually required to be provided, with complicated formulae depending on land use. A new residential unit might require 2 parking spaces. An office building might require one for every worker.”

“Minimum parking requirements increase the cost of constructing a shopping center by up to 67 percent if the parking is in an above-ground structure and by up to 93 percent if the parking is underground.

“In suburban Seattle, parking requirements force developers to spend between $10,000 and $14,000 per dwelling to provide unused parking spaces”

“the average cost of constructing an underground garage in Boston is $95 per square foot, and the average space occupies 330 square feet, so the average cost of a parking space is $31,000 ($95×330). Across the 12 cities, the average cost per space ranges from a low of $26,000 in Phoenix to a high of $48,000 in Honolulu, with an overall average of $34,000 per space”

“taking an autonomous car everywhere you would normally drive is cheaper than owning a car yourself. It’s also much more convenient — because you don’t have to — you know — actually drive. Which, if you think about it, is kind of an absurd activity. You also don’t have to park.”

“If we end private car ownership we effectively end the need for parking. Fleets of autonomous vehicles should be in more-or-less constant motion when demand is high. And when they’re stationary, they can easily wait in marginal places — under freeway overpasses, on the outskirts.”

“in cities, we should only need about 1/10th as many autonomous cars as we currently have private ones.”

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