Monday, October 28, 2013

How Much Traffic Congestion is Caused by Low priced Parking?

Is 30% of traffic actually searching for parking?(Reinventing Parking, Oct. 7, 2013)

Also discussed here: 30% of city traffic is looking for parking? How do you know?(Parking Today, Sep. 17, 2013)

And here: The High Cost of Free Parking(734 pages, Donald C. Shoup, 2005)

 Today we review an analysis of traffic congestion and the portion of that which was found to be cars cruising to find a parking space. Many quote parking guru, Donald Shoup, who said on average that the it was 30% but pointed out that there was a range from 8 to 74% and depended on time of day as well as location and how badly the parking spaces were managed. This leaves little doubt that pricing the parking rate charged dynamically by demand is an effective way to manage a sometimes scarce resource, as demonstrated in San
  Francisco (SF Park).

 parking and congestion  

Key Quotes:

“Sixteen studies conducted between 1927 and 2001 found that, on average, 30 percent of the cars in congested downtown traffic were cruising for parking.”

“The studies are selective because researchers study cruising where they expect to find it - on streets where curb parking is under-priced and overcrowded. “

“there were six measurements of the percentage of traffic that is seeking parking. The results ranged from 8 to 74%, for that average of 30%;
“parking search is potentially an enormous source of congestion and unnecessary traffic in busy business districts when on-street parking is mismanaged so that it is often totally full.”
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