235.480 Transportation System Standards | Wood Village Development Code

235.480 Transportation System Standards.

A. Regional Transportation Plan Standards. After Metro adoption of Regional Transportation Plan amendments, applications for design review (or for land division for developments not requiring design review) must demonstrate compliance with any applicable requirements of the Regional Transportation System Plan or any applicable Transportation System Plan. Demonstration of compliance must include a showing that adopted level of service standards are met for each proposed phase of development.

B. Transportation Impact Analysis. For each development proposal that exceeds the Analysis Threshold or that may have an impact on the surrounding transportation system as described under subsection (D)(1) of this section, the application for land use or design review approval shall include a Traffic Impact Analysis as required by this Code. The Traffic Impact Analysis shall be based on the type and intensity of the proposed land use change or development and its estimated level of impact to the existing and future local and regional transportation systems. The scope of the study will be set by the jurisdiction with authority of the road in cooperation with the applicant and the City. Throughout this section, the phrase “City Manager or designee” is utilized to identify responsible parties. Throughout this section, Multnomah County is recognized to retain jurisdiction on all roadways under their ownership and maintenance.

C. Engineer Certification. The Traffic Impact Analysis shall be prepared and certified by a traffic engineer or civil engineer licensed in the State of Oregon.

(1) A Traffic Impact Analysis is required when the proposed development is projected to generate more than one thousand (1,000) average weekday vehicle trips (vpd), or the proposed development’s location, proposed site plan, or trip generation characteristics could affect traffic safety, access management, street capacity, or other known traffic deficiencies in the vicinity of the site.

(2) A Traffic Impact Analysis or some elements of a Traffic Impact Analysis may be required when the volume threshold under subsection (D)(1) of this section is not met, if a jurisdiction with authority over an abutting roadway provides written notice to the City identifying how its facilities would be significantly affected by the proposed development.

E. Study Area. The Traffic Impact Analysis shall evaluate the Area of Influence of the proposed development and segments of the surrounding transportation system where users are likely to experience a change in the quality of traffic flow, and may specifically include access ramps and facilities on Interstate 84 (I-84). Analysis of I-84 shall be provided to the Oregon Department of Transportation for review and comment. The City Manager or designee may identify additional locations for study if existing traffic operation, safety, or performance is marginal or substandard. Prior to report preparation, the applicant shall submit the proposed scope and analysis assumptions of the Traffic Impact Analysis. The City Manager or designee shall determine whether the scope and analysis assumptions are adequate, or on a County facility, Multnomah County or other qualified party will provide all scope and evaluation functions required in this section, Traffic Impact Analysis.

F. Contents of the Traffic Impact Analysis Report. The Traffic Impact Analysis report shall contain the following information organized in a logical format:

(1) Executive Summary. An Executive Summary of no more than three (3) single-sided pages shall be included at the beginning of the Traffic Impact Analysis report. The Executive Summary shall summarize the analysis and conclusions and identify recommended transportation improvements.

(2) Description of Proposed Development. The Traffic Impact Analysis shall provide a comprehensive project description including but not limited to the following:

(a) Vicinity map.

(b) Site plan.

(d) Time schedule.

(e) Intended use of the site, including the range of uses allowed without additional land-use approvals.

(f) Intensity of use.

(3) Existing Conditions. The Traffic Impact Analysis shall provide a complete evaluation of existing conditions and include maps and/or tables displaying the following information for the Area of Influence and any additional locations previously identified by the City Manager or designee:

(a) Street system including street names and functional classifications.

(b) Pavement and shoulder widths.

(d) Driveways.

(e) Freight access and loading areas.

(f) Intersections.

(g) Traffic volumes.

i. Existing traffic shall be measured within the previous twelve (12) months.

ii. Traffic volumes shall be based on traffic data provided by the applicant to the extent required by the County. In addition, data shall be provided for weekends if weekends are the peak traffic period for either the existing street or the proposed development.

iii. Seasonal variations in traffic volumes shall be considered.

(h) Existing intersection performance indicators including volume-to-capacity ratio and control delay.

(i) Transit information including stop and shelter locations, route numbers, headways, passenger loading, pull outs, and times of service.

(j) Bicycle ways, sidewalks, and accessways.

(k) Collision data for the most recent three (3) year period for which collision data is available.

(4) Traffic Forecasts. The Traffic Impact Analysis report shall provide forecasts of future traffic and I-84 interchange capacity within the Area of Influence and any additional locations previously identified by the City Manager or designee. Traffic forecasts shall be provided for both the Buildout Year and the Long-Range Forecast Year. The report shall include complete documentation of trip generation calculations including Institute of Transportation Engineers (ITE) Trip Generation (latest published edition) use code(s) or an alternative basis of trip generation and the rationale for using the alternative.

(a) Buildout Year Analysis. Buildout Year forecasts shall be Total Traffic at the time of anticipated completion and occupancy of each phase of the development and at the time of completion and occupancy of the entire development. The City shall provide traffic information on other developments to consider in the calculation of Added Traffic.

(b) Long-Range Forecast Year Analysis. The Traffic Impact Analysis shall include a capacity analysis of the potential worst-case long-range impacts to the local transportation system. The forecast year shall be approved by the City Manager or designee.

i. Trip Generation. Estimates of the proposed development’s trip generation shall be made for peak period traffic. Selection of the peak period used in the analysis shall be justified and shall consider, at a minimum, the peak period for the proposed development and the peak period for surrounding streets. The City Manager or designee may require review of other time periods based on known or anticipated marginal or substandard traffic capacity or traffic safety. Trip generation estimates shall be based on ITE’s Trip Generation (latest published edition). The City Manager or designee may approve different trip generation rates when trip generation rates are not available in ITE’s Trip Generation or different rates are justified.

ii. Trip Distribution and Assignment. Traffic generated by the proposed development shall be logically distributed and assigned to the street system within the Area of Influence and any additional locations previously identified by the City Manager or designee. Trip distribution and assignment shall be based on trip distribution information from Multnomah County, ODOT, or Metro, on analysis of local traffic patterns based on data less than twelve (12) months old, or on alternative data approved by the City Manager or designee.

(d) Intersection and Highway Interchange Analysis. Intersection and highway interchange analysis shall conform to the method for operations analysis described in the Highway Capacity Manual 2000 published by the Transportation Research Board.

Analyses on ODOT facilities shall use ODOT’s Analysis Procedures Manual (https://www.oregon.gov/ODOT/TD/TP/pages/apm.aspx). The City Manager or designee may approve an alternative analysis method. The analysis shall document that the impacts of queuing from adjacent intersections or traffic restrictions has been addressed.

(5) Traffic Impacts. The Traffic Impact Analysis shall evaluate access, safety, operation, capacity, circulation, level of service (volume to capacity analysis when analyzing I-84), and performance of the transportation system within the proposed development’s Area of Influence and any additional locations previously identified by the City Manager or designee for both the Buildout Year and any phases thereof, and the Long-Range Forecast Year.

(a) Safety considerations shall be evaluated. Potential safety problems resulting from conflicting turning movements between and among driveways, intersections, and internal traffic shall be addressed. Distance to the nearest driveways on both sides of streets fronting the site and in both directions from site access points shall be shown. On-site driveway stacking and queuing impacts shall be assessed. The potential for shared access with adjacent development shall be assessed.

(b) Geometric design and operational improvements including but not limited to acceleration lanes, deceleration lanes, turning lanes, traffic signals, and channelization shall be considered, evaluated, and recommended when determined necessary by standards and practices adopted by ODOT, Multnomah County, the City or approved by the City Manager or designated representative.

(c) Adequacy of sight distance shall be addressed at the proposed road access point(s) for both the existing road configuration and for the ultimate road configuration based on improvements planned for the development and improvements identified in the Comprehensive Plan Transportation Element. Sight distance shall meet City standards or AASHTO standards as determined by the jurisdiction.

(d) The analysis shall also identify and evaluate related impacts on bicycle, pedestrian, and transit access, circulation, and facilities.

(e) Other operational, circulation, safety, and capacity issues shall be evaluated and addressed as required by the City Manager or designated representative.

(6) Mitigation Identification. The analysis shall make recommendations for improvements necessary for safe and efficient traffic flow and bicycle, pedestrian, and transit movement and access based on and roughly proportional to the identified impacts. Buildout Year, Long-Range Forecast Year, and project phasing impacts shall be considered.

The traffic impact analysis shall discuss the estimated levels of impact, improvements, and mitigations, and shall demonstrate how the recommended mitigations are roughly proportional to the identified impacts.

(7) Recommendations. The Traffic Impact Analysis report shall clearly state the mitigation measures recommended by the analysis and shall summarize how the recommended mitigations are roughly proportional to the identified impacts. The recommended street and highway mitigation measures shall be shown on a scaled drawing that depicts existing and recommended improvements.

G. Conditions. Based on the mitigation measures recommended by the Traffic Impact Analysis, the City in collaboration with the jurisdiction with authority on the road or abutting roads, may impose reasonable conditions on development as necessary to maintain compliance with performance standards in the Transportation System Plan (TSP), including where applicable Level of Service (LOS) standards, and in compliance with standards of the jurisdiction with authority on the road. Such conditions may include requiring construction of off-site improvements, but no improvements to streets or intersections not contiguous to the subject property shall be undertaken without the approval of the affected jurisdiction. (Ord. 3-2021 § 1 (Exh. A))