Springboro City Zoning Code
CHAPTER 1278
Traffic Impact Analysis
1278.01 STUDY AREA.
The base traffic impact analysis study area shall include all major roadways (collectors, arterials, interstates, and other public and private roads) near the site. The study area shall include at least the intersection(s) of the major access roadway(s) with the first major or minor arterial roadway in each travel direction from the development if traffic generated by the proposed development would potentially affect levels of service at the intersection. The minimum study area shall be verified with the Director of Planning and City Engineer before the preparation of the traffic impact analysis report, and the Director of Planning or City Engineer may require additional segments and intersections as deemed appropriate. Subsequent to the traffic impact analysis report, the minimum study area may be expanded by the Director of Planning, City Engineer, or the Planning Commission. The City of Springboro may adopt local and/or statewide Traffic Access and Impact Study Guidelines, or successor guidelines, which shall be used as the basis for any study required by these regulations.
(Ord. 0-15-4. Passed 2-19-15.)
1278.02 PROFESSIONAL QUALIFICATIONS OF THE PERSON PREPARING THE TRAFFIC IMPACT ANALYSIS.
The traffic impact analysis shall be prepared by a traffic or transportation engineer or someone who has the requisite experience preparing traffic impact analyses. The resume and qualifications of the person who prepared the traffic impact analysis shall be included in the report. The professional qualifications of the preparer of the traffic impact analysis must be reviewed and approved by the City Engineer. The applicant is responsible for submitting a traffic impact analysis. If the applicant opts to have the City produce the traffic impact analysis, the City shall require funds to be placed in escrow to cover the City's costs of hiring a qualified person to prepare the traffic impact analysis.
(Ord. 0-15-4. Passed 2-19-15.)
1278.03 USES REQUIRING A TRAFFIC IMPACT ANALYSIS.
The following uses shall require a traffic impact analysis:
(a) Any use projected to generate more than 1,000 vehicle trips per day or 100 vehicle trips during the peak a.m. or p.m. hour;
(b) Multi-family projects including 20 or more dwelling units;
(c) Uses with drive-through service;
(d) Vehicle fueling stations;
(e) Any site within 600 feet of the intersection of 2 public streets, at the discretion of the City Engineer.
(f) Any other uses, at the discretion of the City Engineer.
(Ord. 0-15-4. Passed 2-19-15.)
1278.04 CONTENTS.
The traffic impact analysis shall contain the following for the specified impact study area:
(a) Road Network. A detailed description of the collector and arterial road network, including existing and programmed roadway lanes and lane right-of-way widths; existing and programmed traffic signal locations and signal phasing; existing and planned ingress and egress locations for development mutually served by major roadway facilities with the proposed development (including all access locations adjacent to and within 600 feet of the proposed development property lines); and existing and programmed public transportation services and facilities.
(b) Development Details. A description of development, including phasing and anticipated completion dates.
(c) Existing Conditions. A detailed description of the existing traffic conditions, including the average daily traffic and traffic during the peak a.m. and p.m. hours.
(d) Capacity Analyses. Capacity analyses shall be conducted at the intersections of all major roadways in the impact area that are signalized or that warrant signalization.
(e) Level of Service Impact. Based on the capacity analyses described in sub-paragraph (d) above, a summary of existing levels of service on the impact area network shall be provided.
(f) Traffic Impacts. The following components shall be submitted to the City prior to a Detailed Cumulative Transportation Impact Analysis:
(1) Trip Generation. Indicate daily and a.m. and p.m. peak hour trip generation data. Peak hour trip generation data should reflect the impact anticipated during the existing street peak hour on the adjacent street. The analysis shall show in tabular form the land use components, the trip generation rates, and the total trips generated by land use type. Daily and peak hour trip generation, as well as inbound/outbound direction split shall be based on the report entitled "Trip Generation (latest edition)" by the Institute of Transportation Engineers, or its successors, except when special trip generation research conducted by the person preparing the traffic impact analysis demonstrates alternative data to be more appropriate.
(2) Internal/External Split. Indicate the internal/external split and pass-by trips for daily and peak hour travel. The analysis shall indicate the basis for capturing internal and external trips.
(3) Trip Distribution. Indicate the basis for determining trip distribution for the proposed development and the resultant trip distribution by cardinal direction (north, south, east, and west).
(4) Trip Assignment. Identify the trip assignment (daily and peak hour) within the study area. Daily volumes shall be noted along roadway links. Peak hour volumes shall be reflected in turning movements at development entrances and major roadway intersections.
(g) Detailed Cumulative Transportation Impact Analysis. This analysis shall include existing traffic, traffic growth due to other approved development, and the impact of the proposed development.
(1) This analysis must identify projected average daily and peak hour volumes for all collector and arterial roadways and intersections and must identify the development impact separately from the cumulative traffic volume. For the purposes of these analyses, background traffic shall be identified as existing plus other approved development traffic. Other development traffic shall be identified by using actual traffic analyses for approved projects and historical growth trends on the subject roadways as appropriate.
(2) Capacity analyses shall be conducted to identify levels of service resulting from the cumulative traffic demands, including the proposed development. When the combination of background traffic and the impact from the subject development will reduce the Level of Service (LOS) below LOS C, analyses shall be conducted to identify those improvements required to maintain acceptable LOS standards, as determined by the City Engineer or applicable agency/entity. If the current use is LOS C or below, the LOS must be preserved or improved as determined by the City Engineer or applicable agency/entity. These improvements shall be identified clearly. When determining acceptable LOS standards, the City shall use the most recent versions of the Highway Capacity Manual and AASHTO Geometric Design of Highways and Streets.
(Ord. 0-15-4. Passed 2-19-15.)
1278.05 TRAFFIC STUDY AND TRAFFIC DATA INVENTORY AND FILE.
The City Engineer shall keep a file of all traffic studies, including the capacity allocated for each approved project. In determining the projected demand in Section 1278.04(g)above the impact analysis shall include trips already allocated in previous development approvals. The City Engineer shall provide information when appropriate data already exists and is available in order to prevent duplication.
(Ord. 0-15-4. Passed 2-19-15.)