HomeMy WebLinkAboutCOW 2005-06-27 Item 4D - Discussion - Conceptual Design Analysis for Interurban Avenue South (South 143rd Street to Fort Dent Way) CO U CIL AGENDA SiwosIs
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ITEM INFORMATION
CAS NUMBER. 05-096 I ORIGINAL AGENDA DATE. JUNE 27, 2005
AGENDA ITEM TITLE Interurban Ave S (S 143 St to Fort Dent Way) Conceptual Design Analysis
CATEGORY Discussion Motion Resolution Ordinance Bid Award Public Hearing Other
llt Date 6 ,27/05 Mtg Date Mtg Date l fig Date Mtg Date Aftg Date Mtg Date
SPONSOR Council Ma Adm Svcs DCD Finance Fire Legal P &R Police Z PIV
SPONSOR'S The City has received federal grant funds to design improvements for Interurban Avenue S
SUMMARY from S 143 St to Fort Dent Way. A preliminary plan layout has been developed that is
intended to match into the previous Interurban Ave. improvements with the notable
exception of added landscaped medians and designed U -turn opportunities. The plan
layout will be brought to the meeting for discussion.
REVIEWED BY COW Mtg CA &P Cmte F &S Cmte Transportation Cmte
Utihties Cmte Arts Comm. Parks Comm. Planning Comm.
DATE. 6/13/05
RECOMMENDATIONS:
SPONSOR /ADMIN Presentation and discussion
COMMITTEE Forward to Committee of the Whole for discussion
COST IMPACT FUND SOURCE
EXPENDITURE REQUIRED AMOUNT BUDGETED APPROPRIATION REQUIRED
Fund Source.
Comments
MTG. DATE I RECORD OF COUNCIL ACTION
6/27/05
MTG. DATE I ATTACHMENTS
Information Memo dated June 8, 2005
conceptual drawing
Minutes Transportation Corrunittee June 13, 2005
INFORMATION :MEl'IIO
To:
From:
Date:
Subject:
Mayor Mullet
Public W orks Directo~
June 8, 2005
Interurban Ave S - (S 143rd St to Fort Dent Wav)
Conceptual Design Analysis
ISSUE
Present the conceptual design analysis for approval to proceed with [mal design.
BACKGROUND
The City has received federal grant funds to design improvements for Interurban Ave S from
S 143rd St to Fort Dent Way. KPG, Inc., was selected as the design engineering fIrm.
The existing street cross section is fIve lanes, two through lanes in each direction and a center
two-way left turn lane. The pavement has been in poor condition for several years and there
are no sidewalks for much of the project length. This project was funded to design urban
street improvements including curb, gutter, and sidewalk on both sides of the street; storm
drainage improvements; illumination; pavement restoration; traffic signal interconnect; and
landscaping. The alignment is not expected to change.
ANALYSIS
KPG, Inc., has developed a preliminary plan layout for the street and proposed improvements
to be displayed at the Transportation Committee meeting. A typical U-turn plan and cross
section drawing are attached to this memo. A plan for the entire project will be presented at
the meeting. The character of the new design elements is intended to be consistent with
previously constructed segments of Interurban Ave S. The most notable change to the plan is
the addition of landscaped center medians. While this will limit some of the direct left turn
access into existing driveways, the aesthetic impacts and reduction in accidents are considered
to be signifIcant improvements. In order to mitigate left turn restrictions due to the median, U-
turn opportunities have been proposed.
The alternative to the proposed plan would be to add more left turn pockets or two-way left
turn lanes. This would be less preferable as it would break up the center median into smaller
islands that would not be as aesthetically attractive or reduce accidents as much as the
preferred alternative.
RECOMMENDATION
Approve the conceptual design and authorize staff and consultants to proceed with fInal design
including any recommendations by the Transportation Committee.
attachment: Typical Cross Section
Transportation Committee
June 13, 2005
Present:
Jim Haggerton, Chair; Joe Duffie, Pam Carter
JIm Morrow, Frank Iriarte, Bob Giberson, Robin TIschmak, Lucy Lauterbach,
Joe Glacobazzi, Nandez Miller-KPG
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1. Interurban Ave Conceptual Desh~n Analysis Robin saId Interurban Ave from S l43rd to
Fort Dent Way was the last piece of Interurban to be finished. KPG's design that mcluded some
boulevard elements was so interesting that staff asked KPG to extend it further north beyond S.
l43rd north almost to 1-5. Joe G said the large frontages on Interurban lent themselves to a
boulevard desIgn. Speeding is also an.issue on Interurban, and trees planted m the medIan as well
as on the edges of the street may slow traffic. Nandez talked about the plan for breaks m the
medians for left turns, and how u-turns could be done at some left turn pockets.
Jim M said the new design follows what the Council has approved for recent streets like Till
and Southcenter Parkway and Boulevard. Jim H asked what trees are in the 12' median
landscaped area, and whether an Identifiable theme wIth similar trees was being installed on
other improved streets in the City. Robin said they have learned not to plant trees that are round
in shapes, as trucks will knock offleaves and branches. Instead they are looking at columnar
shapes, but they will use similar trees as in other projects Pam C saId the design looked great,
and was a welcome Improvement. Robm saId by addmg a medIan the project would receive a
hIgher score at Till ratings. There have also been some fatalIties on Interurban, so safety
improvements will help. The Committee asked again that small signs be put warnmg dnvers that
a certain intersection is coming up so driving decisions don't have to be last mmute. Jim also
noted that because S. l60th is a u-turn route for southbound drivers in Till, vehicles commg from
S. 160th to Till often need to wait for the left turns to fimsh before they can turn onto the
highway. The committee wholeheartedly supported the desIgn. Recommend design to June 27
COW, and authorize move toward final design.
2. WSDOT Construction Schedule Although there are not any state construction projects
scheduled for this year in Tukwila, there are several on 1-5,99, and 509 that could affect dnvmg
in the region. 1-405 in Tukwila IS scheduled for 2008. Information.
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.............' )/h " Committee chair approval