HEX Rolling Sunrise Engineer Rsp Part 4 052615HEATH & ASSOCIATES, INC Transportation and Civil Engineering
2214 Tacoma Road Puyallup WA 98371 (253) 770 1401 Fax (253) 770 1473 heathtraffic.com
May 26, 2015
Ms. Janelle Hitch, P.E.
City of Bainbridge Island
280 Madison Avenue N.
Bainbridge Island, WA 98110
Subject: Sight Distance for Rolling Sunrise Plat - Proposed Access points
Ms. Hitch:
I have field reviewed the proposed accesses for the project in order to address A.(2) of the order issued by
Hearing Examiner Stafford Smith from the October 20, 2014 order remanding the application of the
subject project for further studies and documentation. Attached to this letter report is an excerpt from the
report with his request for additional information.
This limited scope traffic assessment recommending sight distance requirements at the Rolling Sunrise’s
two connections to the city of Bainbridge Island’s public road network, assessing whether such
requirements will be met under existing conditions and whether proposed mitigations should be
implemented.
As outlined in the AASHTO guidelines, an entering vehicle eye height of 3.5 feet, located 10 feet behind
the traveled way, as represented by the edge of roadway and an approaching vehicle height of 3.5 feet
should be used in determining entering sight distance. Attached to this letter is an excerpt from the
AASHTO guidelines, Exhibit 9-55, which indicates the intersection sight distances for various speeds.
The sight distance desired for 15 mph is 170 feet. Each of the accesses is discussed below
Hyla Avenue Access
The project access to Hyla Avenue will serve three lots within the Rolling Sunrise project. The roadway
is posted at 25 mph, however, operating speeds given the curvilinear nature of the roadway and narrow
widths are estimated at approximately 15 mph with lower speeds expected near the several curves along
this roadway including the curve which is accessed by the Rolling Sunrise project.
The access to the Rolling Sunrise project is located on the outside of a tight curve with a centerline radius
of approximately 50 to 60 feet. Sight distance looking westerly from the connection point exceeds 200
feet.
When looking southerly, a sight distance of 175 feet is achieved assuming tree trimming over the right of
way. Additional sight distance when looking south can be achieved depending on the further reduction of
vegetation that encroaches into the right of way and sight lines. Because of the vegetation a picture was
not taken.
A copy of the Kitsap County assessor map for this area shows the road layout in conjunction with the
parcels in the vicinity of Hyla Avenue near the Rolling Sunrise access.
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** This map is not a substitute for field survey **
Printed: Friday. May 22, 2015Map Scale: 1 : 2,400
Comments
0 100 200ft
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At Sunrise Entrance Looking North
At Sunrise Entrance Looking West
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At Sunrise Entrance Looking East
At 200 feet West Looking at Hyla Entrance
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