Technical Memorandum. 720 SW Washington Suite 500 Portland, OR dksassociates.com. DATE: July 12, 2017

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1 Technical Memorandum DATE: July 12, 2017 TO: Kay Bork City of Veneta Bill Johnston, AICP Oregon Department of Transportation Christina McDaniel-Wilson, PE Oregon Department of Transportation Keith Blair, PE Oregon Department of Transportation 720 SW Washington Suite 500 Portland, OR dksassociates.com FROM: John Bosket, PE DKS Associates Jasmine Pahukula DKS Associates SUBJECT: Veneta Transportation System Plan Update The purpose of this memorandum is to establish the methods and assumptions to be used for the existing and future conditions transportation analysis for the Veneta Transportation System Plan Update. This memorandum summarizes the study intersections and describes the proposed methodology for volume development, intersection operations analysis, safety analysis, multi-modal analysis, and the development of the small community forecasting tool. Study Intersections The following study intersections will be included, as summarized in Table 1 and Figure 1. Table 1 lists the type and duration of traffic volume counts taken at each intersection. In addition to these, 4-hour (2-6PM) turning movement counts will be collected at the Jeans Road/Huston Road and Perkins Road/Huston Road intersections to support calibration of the travel forecast tool. Table 1: Study Intersections No. Location Count Date Type Duration 1 Jeans Territorial Highway (OR 200) May 23, 2017 TMC 4-hour (2-6PM) 2 OR 8th Street May 23, 2017 TMC 4-hour (2-6PM) 3 OR Territorial Highway May 23, 2017 TMC 16-hour (6AM-10PM) 4 OR Huston Road May 23, 2017 TMC 4-hour (2-6PM) 5 W Broadway 8th Street May 23, 2017 TMC 4-hour (2-6PM) 6 Broadway Territorial Highway May 23, 2017 TMC 4-hour (2-6PM) 7 Hunter Territorial Highway May 23, 2017 TMC 16-hour (6AM-10PM) 8 Hunter Pine Street May 23, 2017 TMC 4-hour (2-6PM) 9 E Hunter Huston Road May 23, 2017 TMC 4-hour (2-6PM) 10 Sertic 10th Street May 23, 2017 TMC 4-hour (2-6PM) 11 Bolton Hill 8th Street May 23, 2017 TMC 4-hour (2-6PM) 12 Bolton Hill Territorial Highway May 23, 2017 TMC 16-hour (6AM-10PM) 13 E Bolton Pine Street May 23, 2017 TMC 4-hour (2-6PM) 14 Perkins Territorial Highway May 23, 2017 TMC 4-hour (2-6PM) TMC = Turning Movement Count 1 July 2017

2 Figure 1: Study Intersections 2

3 VOLUME DEVELOPMENT 2017 Traffic Volumes Study intersection traffic operations will be analyzed using estimated 30 th highest hour traffic volume (30 HV) conditions. The 30 HV development process for existing conditions includes determination of the system peak, and seasonal adjustments. Peak Hour Selection The count data obtained suggests that system-wide peak volumes occur between 4:30 p.m. and 5:30 p.m. The peak for the OR 126/Territorial Highway intersection occurs between 4:25 p.m. to 5:25 p.m., which aligns with the system-wide peak. Thus, we propose using 4:30 p.m. and 5:30 p.m. as the peak hour of traffic to compare to ODOT, County, and City mobility targets for current conditions. Seasonal Factor The traffic count data collected in Veneta during May represents a period where traffic volumes are lower than 30HV peak conditions. Adjustments are required to reach the desired conditions using methodology from the ODOT Analysis Procedures Manual. To determine when the average daily traffic conditions occur along OR 126, data is first examined from Automatic Traffic Recorder (ATR) stations that record highway traffic volumes year-round. For Veneta, one nearby ATR exists: ATR # along OR 126, approximately three miles west of the city near Boettger Lane. We propose using the nearby ATR to develop seasonal factors for the through movements for counts along OR 126 as well as westbound turn movements from 8th street and the Territorial Highway (see Table 2). The traffic volumes along Territorial Highway will be seasonally factored (see Table 2) using ODOT Seasonal Trend Table based on a summer trend. The traffic volumes within the rest of the city will be seasonally factored (see Table 2) using ODOT Seasonal Trend Table based on a commuter trend. Table 2: Seasonal Factors in Veneta Seasonal Factor Method Average Daily Factor Where Factor Applies Veneta ATR (ART #20-005) 1.23 All through movements along OR 126 and westbound movements from 8 th Street and Territorial Highway ODOT Seasonal Trend Table 1.15 Remaining movements along Territorial Highway ODOT Seasonal Trend Table 1.03 Remaining intersections within the city 2040 Traffic Volumes The Small Community Forecasting Tool that will be developed for the TSP Update will be used to forecast 2040 volumes with consideration for planned developments and expected traffic growth on OR 126 and Territorial Highway 1. The traffic volume forecasts will be developed for the design hour, reflecting seasonally 1 Based on ODOT Future Volume Table estimates. 3

4 adjusted weekday p.m. peak hour operating conditions. The proposed development process of the Small Community Forecasting Tool is described in a later section. TRAFFIC ANALYSIS Intersection Mobility Targets All intersections under state jurisdiction must comply with the volume to capacity (v/c) ratio targets in the Oregon Highway Plan (OHP). The ODOT v/c targets are based on highway classification and posted speeds (see Table 3). Table 3: Study Intersection Mobility Targets No. Location Jurisdiction Intersection Control Mobility Target 1 Jeans Territorial Highway (OR 200) ODOT Un-signalized v/c < 0.95 (major) v/c < 0.95 (minor) 2 OR 8th Street ODOT Un-signalized v/c < 0.80 (major) v/c < 0.90 (minor) 3 OR Territorial Highway ODOT Signalized v/c < OR Huston Road ODOT Un-signalized v/c < 0.80 (major) v/c < 0.90 (minor) 5 W Broadway 8th Street City Un-signalized * 6 Broadway Territorial Highway ODOT Un-signalized v/c < 0.95 (major) v/c < 0.95 (minor) 7 Hunter Territorial Highway ODOT Un-signalized v/c < 0.95 (major) v/c < 0.95 (minor) 8 Hunter Pine Street City Un-signalized * 9 E Hunter Huston Road City Un-signalized * 10 Sertic 10th Street City Un-signalized * 11 Bolton Hill 8th Street County Un-signalized v/c max, 0.95 or min LOS E 1 12 Bolton Hill Territorial Highway ODOT Un-signalized v/c < 0.95 (major) v/c < 0.95 (minor) 13 E Bolton Pine Street City Un-signalized * 14 Perkins Territorial Highway ODOT Un-signalized 1 Based on Lane County Draft TSP, April 2017 (Major) Worst movement on the major street approach. (Minor) Worst movement on the minor street approach. *The City of Veneta does not currently have adopted mobility standards. v/c < 0.90 (major) v/c < 0.90 (minor) Analysis Parameters Parameters for traffic analysis will be gathered using varying sources and methodologies. Data needed will be gathered via field work, collected traffic volume data, aerial photos, GIS, ODOT inventory and collision reports. Table 4 lists some of the sources that will be used on specific parameters. 4

5 Table 4: Analysis Parameters Parameter Description Source Intersection/ Roadway Geometry # of lanes, lane configuration, cross-sectional information Field work, Highway inventory report, Digital video log, aerial photos, ODOT TransGIS Operational Data Posted speeds, intersection control Field work, Digital video log, aerial photos Peak Hour Factor Peak Hour Factor Calculated Traffic Volumes Signal Timing Data Traffic Operations Collision Data AADT, 30 HV, DHV Phasing, coordination, clearance timing v/c, LOS Intersection collisions, roadway segment collisions, SPIS ODOT Transportation Volume Table; Calculated from new counts; ODOT 2034 Future Volume Table, Small Community Forecast Tool ODOT Region Calculated using 2000 HCM methodology for signalized intersections, and 2010 HCM methodology for un-signalized intersections ODOT Crash Data System, ODOT TransGIS, ODOT Crash Rate Table, ODOT Crash Rate Book SAFETY ANALYSIS The safety analysis will be performed as described in the Scope of Work. MULTI-MODAL ANALYSIS The multi-modal analysis will be performed as described in the Scope of Work. 5

6 SMALL COMMUNITY FORECASTING TOOL Roadway Network The existing network will include arterial and collector roadways along with most local public streets within Veneta s UGB. The future base network will be determined based on input from City staff by identifying financially committed projects. Some non-committed (but reasonably likely funded) projects may be included in the base model if they are deemed to have a significant influence on future travel patterns to the extent that other forecasts are altered. Transportation Analysis Zones (TAZs) The Veneta Urban Growth Boundary (UGB) (and surrounding model areas) will be divided into TAZs based on current and future land use data, transportation network (e.g., streets, railroad), and environmental constraints (e.g., streams, greenway) as outlined in Chapter 6 of ODOT s APM V2. The Veneta network will also include external zones at the key gateways into and out of the city (as well as outlying residential areas) to account for vehicle trips that enter and exit the Veneta UGB. As shown in Figure 2, there are six proposed external zones, located at: a) OR 126, west of the UGB Boundary b) OR 126, east of Central Road c) Territorial Highway, north of Jeans Road d) Territorial Highway, south of Fleck Road e) Bolton Hill Road, north of Vaughn Road f) Central Road, south of Chapman Heights Road Land Use Land use is a key factor affecting the traffic demands placed on Veneta s transportation system. The location, density, type, and mixture of land uses have a direct impact on traffic levels and patterns. The existing and future land use inventory will be developed based on the recent housing needs 2 and economic opportunities 3 analyses (see attachments), Zoning Map and Code, GIS-based tax lot data, aerial photos and other relevant land-use plans. The existing and future population totals for the UGB will be based on control totals developed by Portland State University s Research Center 4. 2 City of Veneta Residential Buildable Land Inventory and Housing Needs Analysis, Veneta Community Development Department, City of Veneta Economic Opportunities Analysis, Community Planning Workshop, May Certified Population Estimates 2017 and 2040, Portland State University, Web, Accessed May 26,

7 Figure 2: External TAZs 7

8 Travel Demand Travel demand on roadways and at intersections in Veneta will be estimated using the ODOT APM V2 methodology for the enhanced zonal (EZCA) analysis methods 5. This methodology will include estimating all vehicle trips (not just growth increment), adjusting the trip distribution to reduce household-to-household trips, and using VISUM modeling software to perform the trip assignment. Travel demand will be estimated for 30 th highest hour conditions for the years 2017 and The purpose of the 2017 forecast tool is to calibrate the network in preparation for developing the 2040 network, which would then be used for future analysis. The travel demand analysis includes the translation of City land use information into motor vehicle trips. This will be done for each of the Veneta TAZs based on the existing and projected land uses described previously in the Land Use section of this memorandum. Trips traveling to and from the external TAZs will be estimated for both the 2017 and 2040 analysis years. Trip Types Travel forecast projections involve the determination of three distinct types of trips, which are categorized based on whether their origin and/or destination (i.e., the trip ends) are internal or external to the Veneta UGB. The three trip types and how they apply to Veneta are described in the list below. External-External (E-E) Trips do not have an origin or destination in Veneta and either do not stop or only make a very minor stop while passing through the Veneta UGB. These trips are typically referred to as through traffic. Internal-External (I-E) Trips originate in Veneta and are traveling to a location outside of the Veneta UGB and External-Internal (E-I) Trips originate outside of the Veneta UGB and are traveling to a location within Veneta. Internal-Internal (I-I) Trips travel from one location within the Veneta UGB to another location within the UGB. External Trip Ends External trip ends are the origin and/or destination of E-E, I-E, or E-I trips and will be estimated for both 2017 and 2040 and for 30 th highest hour conditions at each of the gateways shown in Figure 2. The number of 2017 external trip ends will be based on existing traffic volumes at key gateways to the city. Bluetooth data (collected from electronic devices such as laptops or cell phones) will be collected at the following four primary gateways to the city: a) OR 126, west of the UGB Boundary b) OR 126, east of Central Road c) Territorial Highway, north of Jeans Road d) Territorial Highway, south of Fleck Road The Bluetooth data will be used to determine the portion of through traffic compared to the portion of traffic with either an origin or destination within Veneta. The through traffic at the remaining two minor gateways will be estimated based on existing traffic volumes and traffic volumes on similar roadways. Growth estimates based on the ODOT Future Volume Tables will be applied to each gateway to determine 2040 external trip ends for through traffic on OR 126 and Territorial Highway. The growth rate for the remaining 5 Analysis Procedures Manual Version 2, Oregon Department of Transportation, February

9 gateways will be estimated using population growth estimates, growth on OR 126 and Territorial Highway, and other comparable growth estimates available (i.e., growth on similar facilities). Internal Trip Ends The number of internal trip ends in Veneta was will be determined using a land use-based trip generation methodology, which translates land use quantities (number of dwelling units or number of employees) into vehicle trip ends (number of vehicles entering or leaving a TAZ) based on empirically-derived trip generation rates. The ITE Trip Generation Manual, 9 th Edition will be used to estimate residential and employment (retail, service, education, other) trips. Trip Distribution Trip distribution will be used to estimate how many trips travel between each of the internal and external TAZs. The external trips passing through Veneta will be distributed based on the Bluetooth data discussed previously as well as estimates using traffic count data and engineering judgment for some the lower volume external gateways. Distribution for trips traveling to and from internal zones (i.e., trips having at least one internal trip end) was based on weighting the attractiveness of each zone, as measured by the number of trip ends generated by the zone. Separate weighting percentages were used for household and non-household trip ends because otherwise household-to-household trips would be higher than expected for the PM peak hour. Trip Assignment Trip assignment will be performed using VISUM modeling software. The assignment will be based on an iterative shortest path (i.e., minimum travel time) search considering the cumulative travel time composed of both segment and intersection delay. Calibration Calibration will be performed on the 2017 base year forecast tool by comparing the forecast tool volumes at the study intersections with existing 2017 traffic volumes. A plot comparing the existing traffic volumes and the base year forecast tool volumes for all study intersection turn movements will be analyzed to evaluate the accuracy of each forecast tool; the fitted curve and R 2 value should be close to 1.0. The calibration and validation process requires an iterative and systematic approach involving three tiers: error checking, system issues and spot location issues as described in the ODOT APM V2. Forecasted Volumes Raw volumes from the Small Community Forecasting Tool will be post-processed using methods consistent with the ODOT APM V2. This approach is derived from methodologies outlined in the National Cooperative Highway Research Program (NCHRP) Report 765 Highway Traffic Data for Urbanized Area Project Planning and Design. 9