Washington D.C. recently revised bike parking requirements for new or rehabilitated residential buildings, building on precedents first set in 2007.
"On November 28th, DDOT adopted changes to bicycle parking rules at residential buildings," reports the Wash Cycle bike advocacy blog.
"Thanks to the update, all new or rehabilitated residential buildings of 8 units or more are now required to provide 1 bicycle parking space for every 3 units," according to the post. More details about the nature of parking required: "Parking should, for example, be indoors; but if not possible, then be in a secure, covered area adjacent to the building. The rules define how much space there needs to be, the clearance, lighting, accessibility, signage, etc..."
The new requirement update a legislative history that goes back to 2007, when the first of such requirements were considered.
FULL STORY: Residential buildings now required to provide bike parking

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Planning for Universal Design
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Economic & Planning Systems, Inc.
UCLA Lewis Center for Regional Policy Studies
Mpact (formerly Rail~Volution)
Chaddick Institute at DePaul University
City of Piedmont, CA
Great Falls Development Authority, Inc.
HUDs Office of Policy Development and Research