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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