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6. Estimation of Trips Generated. The TIA shall include an estimate of the trips the <br /> proposal will generate. Project trip generation rates shall be estimated using the most current version <br /> of the Institute of Transportation Engineers' Trip Generation Manual. Where available, equations <br /> may be used rather than average trip generation rates, but only if there are at least 20 data points in <br /> the sample and the Coefficient of Determination (RZ) for the sample is greater than 0.75. <br /> 7. Site Traffic Distribution and Assignment. The TIA shall include manual traffic <br /> distribution and assignment based on the gravity model principle. The distribution and assignment <br /> may be accomplished using experience, judgment, and knowledge of local conditions. <br /> 8. Transportation Systems and Level of Service Requirements. The TIA shall <br /> include: <br /> 8.1 Roadway and Intersection Capacity. <br /> 8.1.1 All streets and intersections contiguous to the development; <br /> 8.1.2 All streets and intersections that provide direct access to or from the <br /> development, regardless of the generated volume of traffic; <br /> 8.1.3 All streets and intersections off site from the development that will <br /> receive 50 or more additional peak-hour vehicular trips upon completion of any <br /> phase of the development; <br /> 8.1.4 Level of Service standards for the completed development as <br /> calculated by methods identified in the most current edition of the Transportation <br /> Research Boazd's Highway Capacity Manual or Highway Capacity Software. Other <br /> capacity analysis programs maybe used if approved by the City Traffic Engineer, or <br /> designee. All intersections and/or street segment links within the study area must be <br /> evaluated for capacity. The manual and software contain separate calculations for <br /> two-lane and multi-lane free-flow roadways, signalized arterials, and signalized and <br /> unsignalized intersections. <br /> 8.2 Roadway and Intersection Safety. Projected accident rates for off-site streets <br /> and intersections that will receive 50 or more additional peak hour trips upon completion of <br /> the development, taking into consideration proposed mitigation measures including access <br /> restrictions. Accident records must be researched for all critical segment links and <br /> intersections within the study area. If accident rates, or patterns of accidents, are forming at <br /> certain locations, a determination must be made on whether the probability of these <br /> occurrences will increase with the addition of the projected traffic volumes. Examples of <br /> recumng accidents include numerousright-angle or reaz-end collisions at an intersection, or <br /> a high frequency of vehicles leaving the roadway on a horizontal curve. <br /> 9. Meeting Minimum Level of Service and Safety Standards. The traffic study shall <br /> identify mitigation measures to meet a minimum level of service and safety standards. The TIA shall <br /> state whether the applicant will have the mitigation measures in place at the time of occupancy of <br /> <br /> the properties, or if a financial commitment is in place to complete the necessary infrastructure <br /> <br /> Administrative Order - 6 <br /> <br /> r:\adm inord\rules\0l stdstia 1 ao.wpd(12/06/01) <br /> <br />