HomeMy WebLinkAboutTHE SUMMIT ON COLLEGE PARKING GARAGE - MJA/FDP - FDP130056 - REPORTS - (18)DESMAN ASSOCIATES ARCHITECTS ENGINEERS PLANNERS PARKING CONSULTANTS RESTORATION ENGINEERS
DENVER CORPORATE CENTER III 7900 EAST UNION Ave #925 PHONE 303/740-1700 FAX 303/740-1703 email@desman.com
NEW YORK CHICAGO WASHINGTON, D.C. BOSTON CLEVELAND HARTFORD FT. LAUDERDALE DENVER
February 3, 2014
Mr. Seth Lorson
Project Planner
Community Development & Neighborhood Services
City of Fort Collins
281 N. College Avenue
Fort Collins, CO 80524
RE: Request for Modification of Standards
The Summit on College Parking Structure
Dear Mr. Lorson:
Table A in Section 3.2.2 (L) of the City of Fort Collins Land Use Code indicates a drive aisle width of 20’ for
60° angled parking and one-way traffic circulation. The 20’ width of the drive aisle for 60° angled parking and
one-way traffic flow, in our opinion as parking professionals, is wider than generally required for parking
storage and can be reduced to approximately 15’ in width with no detrimental effect on the users of the Summit
on College parking structure or to the public good.
Parking dimensions have been developed to comfortably accommodate the composite design vehicle, which
refers to the dimensions of the 85th percentile vehicle in the range of all cars, pickups, vans, sport utility and
crossover vehicles from smallest (zero Percentile) to largest (100th percentile) based on 2010 sales. The
composite design vehicle is currently the size of a Chevrolet Traverse, pictured below. The dimensions of this
crossover vehicle are 6’-7” in width by 17’-1” in length. The dimensions of the composite design vehicle have
varied minimally over the past 25 years in the United States.
Attachment #9
DESMAN
ASSOCIATES
Modification of Standards
February 3, 2014
Page 2
The table on the following page lists parking geometrics (dimensions) by Level of Service (LOS) for parking
modules from the National Parking Association (NPA). Traffic engineers developed the LOS approach to
classify traffic conditions on roadways from A (free flow) to F (gridlock). The LOS approach has been adopted
by many parking consultants to help classify conditions in parking facilities. The LOS categories for parking
geometrics are as follows:
LOS A = Excellent
LOS B = Good
LOS C = Acceptable
LOS D = Poor (minimally acceptable)
LOS criteria should be related to the needs and concerns of users. Users with low familiarity and high turnover
should be accorded a higher LOS than users with high familiarity and low turnover. Generally recommended
for moderate to high turnover parking (retail, restaurant, service, etc.) are minimum LOS B geometrics and
recommended for low turnover parking (employee, commuter, resident, etc.) are LOS C geometrics.
Parking Module Dimensions by Level of Service
Level of Service ALevel of Service B
Parking Vehicle Drive Aisle Module Parking Vehicle Drive Aisle Module
Angle Projection Width Width Angle Projection Width Width
45 17'‐6" 14'‐6" 49'‐6" 45 17'‐6" 13'‐6" 48'‐6"
50 18'‐1" 14'‐10" 51'‐0" 50 18'‐1" 13'‐10" 50'‐0"
55 18'‐6" 15'‐6" 52'‐6" 55 18'‐6" 14'‐6" 51'‐6"
60 18'‐10" 16'‐4" 54'‐0" 60 18'‐10" 15'‐4" 53'‐0"
65 19'‐0" 17'‐6" 55'‐6" 65 19'‐0" 16'‐6" 54'‐6"
70 19'‐1" 18'‐4" 56'‐6" 70 19'‐1" 17'‐4" 55'‐6"
75 18'‐11" 19'‐8" 57'‐6" 75 18'‐11" 18'‐8" 56'‐6"
90 17'‐10" 25'‐10" 61'‐6" 90 17'‐10" 24'‐10" 60'‐6"
Level of Service C Level of Service D
Parking Vehicle Drive Aisle Module Parking Vehicle Drive Aisle Module
Angle Projection Width Width Angle Projection Width Width
45 17'‐6" 12'‐6" 47'‐6" 45 17'‐6" 11'‐6" 46'‐6"
50 18'‐1" 12'‐10" 49'‐0" 50 18'‐1" 11'‐10" 48'‐0"
55 18'‐6" 13'‐6" 50'‐6" 55 18'‐6" 12'‐6" 49'‐6"
60 18'‐10" 14'‐4" 52'‐0" 60 18'‐10" 13'‐4" 51'‐0"
65 19'‐0" 15'‐6" 53'‐6" 65 19'‐0" 14'‐6" 52'‐6"
70 19'‐1" 16'‐4" 54'‐6" 70 19'‐1" 15'‐4" 53'‐6"
75 18'‐11" 17'‐8" 55'‐6" 75 18'‐11" 16'‐8" 54'‐6"
90 17'‐10" 23'‐10" 59'‐6" 90 17'‐10" 22'‐10" 58'‐6"
Source: Guidelines for Parking Geometrics, National Parking Association, 2011.
DESMAN
ASSOCIATES
Modification of Standards
February 3, 2014
Page 3
Proposed for the Summit on College parking structure is a parking module that is 53’-1” wide for 60 parking
and one-way traffic flow (19’-0” vehicle projections and 15’-1” drive aisle), as shown on the concept plan
below. The 19’-0” vehicle projection is of sufficient length to accommodate the 6’-7” x 17’-1” composite
design vehicle, as illustrated in the graphic below the floor plan.
Summit on College Parking Structure
Typical Level Parking Plan
DESMAN
ASSOCIATES
Modification of Standards
February 3, 2014
Page 4
As indicated in the table from the NPA on page 2, a 53’-0” wide parking module rates LOS B, which is more
than comfortable for low turnover residential parking. It is further illustrated on the flowing page with the use
of our AutoTURN program that the 53’-1” parking bay will accommodate vehicles parking on each side of the
proposed 15’-1” wide drive aisle and the turns into and out of the parking bay are very comfortable even with
the use of a large vehicle template. The parked vehicles are set back a minimum distance of over three feet from
the passing vehicle. The circulation will be even more comfortable for small cars. Additionally, vehicles will
be able to comfortably back out of the first 60° stall and enter and exit the other 60° stalls without conflicting
with parked vehicles in adjacent stalls, as illustrated in the second AutoTURN image.
DESMAN Associates was recently involved in the design of the East Wing Addition Parking Garage for
Children’s Hospital Colorado (CHC) in Aurora. In order to preserve a view corridor, the Anschutz Medical
Campus Design Review Board requested that the width of the parking structure be reduced in order to preserve a
view corridor. In order to narrow the garage as much as being requested, two parking bays with 90° parking and
two-way traffic were reduced with the use of 60° angled parking and one-way traffic flow. The clear width of
the angled parking bays are 51-8” wide (19’-0” vehicle projections with 13’-8 wide drive aisles). The garage
was greeted with rave reviews by the staff parking in it with respect to ease of traffic flow. Contact information
for CHC is below:
Ms. Kathy Hurley Ms. Selina Burridge
Manager, EOC Parking and Access Control Supervisor
Children’s Hospital Colorado Children’s Hospital Colorado
(720) 777-2793 (720) 777-9775
Kathy.Hurley@childrenscolorado.org Selina.Burridge@childrenscolorado.org
The granting of the requested modification of standards would not be detrimental to the public good and will
promote the general purpose of the standard for which the modification is requested equally as well as the
standard for which the modification is being requested. Based on the information presented herein, the request
for modification of standards is very reasonable and should be granted.
Respectfully submitted,
DESMAN Associates
Scot D. Martin Stephen J. Rebora, R.A.
Senior Parking Consultant President