HomeMy WebLinkAboutCommission Memo -request UDC amendment 38 25 020 - parking stall dimensions Commission Memorandum
TO: Honorable Mayor and City Commission.
FROM: Scott Lee, City Parking Manager.
SUBJECT: Request for Unified Development Code Amendment
DATE:
July 8, 2014
I would like to request a Unified Development Code amendment to Section 38.25.020 regarding parking dimensions for parking structures.
The City of Bozeman Unified
Development Code currently requires uncurbed standard parking stalls to measure 9 feet wide and 20 feet in length. If parking is configured at 90 degrees to the drive aisle then the
aisle must be 26 feet wide. See Attachment A.
I request a code amendment be made to such that uncurbed standard parking stalls are required to measure 9 feet wide and 18 feet in length.
The amendment should also reduce the required drive aisle width for 90 degree configurations to be 24 feet wide.
These amendments are justified for the following reasons:
The City of
Bozeman’s Bridger Park Garage incorporates 90 degree uncurbed standard parking stalls that are 9 feet wide and 18 feet in length. The corresponding two-way drive aisle is 24 feet wide.
See Attachment B
Numerous nationally accepted publications and guidelines establish that the 18’-24’-18’ standard delivers a “Level of Service ‘A’” in parking structures with 90 degree
configurations and two-way drive aisles.
These publications include: “Parking Structures: Planning, Design, Construction, Maintenance and Repair, Third Edition” by Anthony Chrest,
et al. “The Dimensions of Parking” by the Urban Land Institute “Guidelines for Parking Geometrics” by the National Parking Association
I discussed this discrepancy with the Bozeman
Parking Commission Executive Committee (Ben Lloyd, Chris Naumann, and Ryan Olson) and they concur that a code amendment is warranted.
Therefore, in order to align UDC Section 38.25.020
with the dimensions of the Bridger Park Garage and the prevailing national standards, I respectfully recommend this code amendment as outlined above.
Cc: Wendy Thomas, Community Development
Director
Attachment A
Sec. 38.25.020. Stall, aisle and driveway design.
Parking dimensions. The following shall be the minimum parking space dimensions: See also Figure 38.25.020 in Appendix
A to this chapter.
Table 38.25.020
Width1
Length
Angle
Standard
Disabled6
Compact5
Standard
Disabled
Compact5
Aisle Width
90
9'
13'
8'
18/202
18/202
16'
263
60
9'
13'
8'
18/202
18/202
16'
18/234
45
9'
13'
8'
18/202
18/202
16'
15/234
Notes:
1As measured by a line perpendicular to the stall line at a point on the outside end of the
stall, except when the stall is on the inside edge of a curve, in which case the point of measurement shall be on the inside end of the stall.
218 feet if measured from a curb on the
inside edge of the stall; 20 feet if measured from a painted line on the inside edge of the stall.
3For 90-degree parking, aisles are two-way;
4First number refers to one-way traffic
and the second number to two-way traffic. If the aisle is needed as a fire lane, a 20-foot minimum is required.
Attachment B
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