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Home My WebLink AboutCOM2010-00059 Traffic Analysis - COM Engineering / Geo-Tech Reports - 11/28/2007 HEATH & ASSOCIATES, INC. Transportation and Civil Engineering ALLYN VIEW SQUARE TRAFFIC IMPACT ANALYSIS MASON COUNTY, WA gY B. �s`470NAL 07 Prepared for: Marty Reynolds&Loren Olsen PO Box 792 Port Orchard, Wa 98366 NOVEMBER 2007 2214 Tacoma Road•Puyallup,WA 98371 •(253)770-1401 •Fax(253)770-1473 ALLYN VIEW SQUARE TRAFFIC IMPACT ANALYSIS TABLE OF CONTENTS I. Introduction..................................................................................................................3 II. Project Description.......................................................................................................3 III. Existing Conditions......................................................................................................3 IV. Forecasted Traffic Demand..........................................................................................9 V. Summary & Mitigation...............................................................................................14 Appendix LIST OF TABLES 1. Existing Level of Service.............................................................................................8 2. Trip Generation ..........................................................................................................10 3. Future LOS With and Without the Project.................................................................14 LIST OF FIGURES 1. Vicinity Map & Roadway System................................................................................4 2. Site Plan........................................................................................................................5 3. Existing PM Peak Hour Volumes ................................................................................7 4. Trip Distribution &Assignment.................................................................................11 5. 2009 Peak Hour Volumes Without Project................................................................12 6. 2009 Peak Hour Volumes With Project.....................................................................13 2 ALLYN VIEW SQUARE TRAFFIC IMPACT ANALYSIS I. INTRODUCTION This study serves to examine traffic impacts related to the Allyn View Square project. The main goals of this study concentrate on assessing existing roadway conditions and intersection congestion, forecasting newly generated project traffic, and estimating future delays. The first task includes the collection of roadway information,road improvement information, and peak hour traffic counts. Next, a detailed level of service analysis of the existing volumes is made to determine the present degree of congestion on the network. Based on this analysis, forecasts of future traffic levels on the surrounding street system are determined. Following this forecast,the future service levels for the key intersections are investigated. As a final step, applicable conclusions and possible on-site/off-site mitigation measures are defined and addressed. H. PROJECT DESCRIPTION The proposed Allyn View Square project is a mixed-use site consisting of 13 condominium units, 34,950 square feet of medical-dental office space, and 3,900 square feet of general office space. This office usage was generally determined based on market conditions for the area. The site is located on the northeast corner of the intersection of Lakeland Drive and Wheelwright Street in the Allyn area of Mason County. Access to the site will be via one entrance on Lakeland Drive and one entrance on Wheelwright Street. Land uses surrounding the site are retail, commercial, residential, or undeveloped land. Development forecasts estimate a project completion date of 2009. Figure 1 on the following page shows the site location and roadway system. The proposed site plan is given in Figure 2. III. EXISTING CONDITIONS A. Surrounding Street Network The street network serving the proposed project consists of a variety of roadways. Streets near the site mainly consist of two-lane arterials and highways. Defining characteristics for these roadways vary with respect to lane widths, grades, speeds, and function. Differences are based on specific roadway designations and proximity to major employment areas. The primary roadways are described on page 6. 3 2 N �2a SITE ti i W 3 AVST!!y RD ALLYN VIEW SQUARE HEATH & ASSOCIATES, INC VICINITY MAP#ROADWAY SYSTEM Transportation and Civil Engineering FIGURE I 0 N r �yy YY t Q � ad�� Igil, W ._ sy�8'yaw t 4 o � I 9 SD'��S �' •mil � W 181, _ & 4j 1 i� cY h 1 8 99' 5 d •g�i.• p �O Pin �n a 4.)o0 N l F R• s/CQII :a' 1 �` S0�6d5 •� e � s G _ i ALLYN VIEW SQUARE HEATH & ASSOCIATES, INC 51TE PLAN Transportation and Civil Engineering FIGURE 2 SR-3 is a north-south,two-lane roadway that lies to the east of the site. The speed limit along this road is 35 mph in in the site vicinity. The travel lanes are roughly 12 feet wide with paved shoulders transitioning to gravel. E Lakeland Drive is an east-west two lane arterial that borders the south side of the project. The posted speed limit is 25 mph. Pavement surfacing is composed of conventional asphalt concrete. Lanes are 11 feet wide with paved shoulders. E Wheelwright Street is a north-south local road which borders the west side of the project. Total roadway width is roughly 20 feet, with a posted speed limit of 20 mph. B. Roadway Improvements A review of the WSDOT Capital Projects indicates no improvements in the project vicinity. No Mason County projects were identified either. C. Peak Hour Volumes Field data for this study was collected in August of 2007. Traffic counts were taken during the evening peak period between the hours of 4 PM and 6 PM. This specific peak period was targeted for analysis purposes since it generally represents a worst case scenario for commercial sites with respect to traffic conditions. This is primarily due to the common 8 AM to 5 PM work schedule and the greater number of recreation/shopping trips associated with the early evening period. Commuters generally travel from home to work(or vice versa) in the morning and evening which translates to a natural peak in intersection traffic loads when combined with the relatively large number of evening personal and retail trips. Figure 3 on the following page shows the weekday PM peak hour volumes for the key intersections of SR-3/Lakeland Dr and Lakeland Dr/Wheelwright St. ADT volumes for the pertinent roadways may be obtained from Mason County and WSDOT. D. Existing Level of Service Existing peak hour delays were determined through the use of the Highway Capacity Manual 2000. Capacity analysis is used to determine level of service(LOS)which is an established measure of congestion for transportation facilities. LOS is defined for a variety of facilities including intersections, freeways, arterials, etc. A complete definition of level of service and related criteria can be found in the HCM. The methodology for determining the LOS at signalized intersections strives to determine the volume to capacity(v/c)ratios for the various intersection movements as well as the average control delay for those movements. Delay is generally used to measure the degree of driver discomfort,frustration, fuel consumption, and lost time. Control delay, in particular, 6 s� �2 N 96 497 5 52-+ +--8 �y SITE 3-11. sroP 4-4 �5 16 340 6 1 O 7 2J6 63--* STOP -1 14 17* t r' -5 � O 0 1 3 quSr�N RD ALLYN VIEW SQUARE HEATH & ASSOCIATES, INC EXISTING PM PEAK HOUP VOLUMES Transportation and Civil Engineering FIGURE 3