A. Purpose. The purpose of a TIA is to:
1. Assess the effects of a proposed development on the existing and planned roadway systems.
2. Determine improvements necessary to mitigate negative traffic impacts from a proposed development.
3. Determine roughly proportionate responsibilities for the sharing of traffic mitigation expenses to be borne by the City and the subdivider or developer.
4. Ensure that the major street network for Glenpool is based on the operational values of Level of Service Category D, or better, as a minimum criterion for design purposes. Level of Service D is the industry standard for traffic operations that balances vehicle movement, impacts on neighborhoods, and expenses to developers and the public.
B. Applicability. A TIA is required to be submitted at the time of platting or site plan review only for developments that exceed any threshold described below. The City reserves the right to require a TIA for land developments that do not meet the threshold requirements but may impact a sensitive area with traffic issues or may be a known public concern.
1. Development that generates more than 100 Peak Hour Trips (PHT).
2. Development that generates more than 5,000 vehicle trips per day (VTD).
3. Development where more than 40 acres of property are involved and impacted by the development. Minor subdivisions or low intensity developments on larger parcels do not require a TIA.
4. Development that would result in an amendment to the major street and highway plan.
5. Land uses that have unusually high traffic generation, fleet vehicle characteristics, or involve special traffic design considerations, such as regularly occurring oversized, or slow moving, vehicles that require special traffic geometry designs.
C. Required Findings of a TIA. For purposes of enforcing the requirements in this Section, the TIA shall identify the following:
1. The existing, and known proposed, background traffic not created or associated with traffic generated by the proposed development.
2. The projected traffic volumes calculated to be present after a project is completed in the TIA study area.
3. Existing and anticipated traffic queues of vehicles stacking to make a traffic movement in the TIA study area.
4. Existing and anticipated trip distribution of the percentage estimates per turning movement from the proposed development.
5. A Trip Generation Summary, in tabular form, that summarizes existing and anticipated trip generation characteristics of a development for an entire day, including A.M. and P.M. peak periods, rates, units, and all assumptions used to calculate the number of anticipated trips.
D. TIA Responsibility. The primary responsibility for assessing the traffic impacts associated with a proposed development rests with the applicant. The City serves in a review capacity for this process. Both the City and subdivider or developer share responsibility to consider all reasonable solutions to mitigate transportation problems identified through the study process. The TIA must be prepared, signed, and sealed by a professional traffic operations engineer registered to practice in Oklahoma, with experience sufficient to assess traffic impacts.
E. TIA Scope Assessment.
1. Prior to the initiation of a TIA, the subdivider or developer and the representing engineer shall meet with the City Engineer to formally determine the scope of the TIA. The TIA scope will be sufficiently scaled to reflect the traffic impacts of the proposed use necessitating the TIA and shall include pedestrian and bicycle analysis.
2. Once the scope of the TIA is established, the City Engineer will formally stipulate the scope in writing.
3. The City Engineer reserves the right to expand or contract the TIA scope as additional details about the proposed use are ascertained, based on generally accepted traffic engineering practices.
4. If the TIA pertains to ODOT system highways, a representative from ODOT shall also be involved in the scope assessment and in the TIA approval process.
F. TIA Review. The TIA shall be reviewed by the City Engineer and any other necessary review authorities, including ODOT if the project is located on an ODOT system highway, and Tulsa County, when applicable. Review comments shall be provided to the applicant for response.
G. City Assistance in Improvements. During the course of making required traffic improvements identified through the TIA, the City, at its discretion, may elect to partner with the subdivider or developer and use its governmental powers to assist in the timely and cost effective implementation of improvements. Specifically, the City may agree to provide any of the following forms of assistance:
1. Acquisition of necessary rights-of-way and easements.
2. Relocation of utilities.
3. Obtaining approvals from Tulsa County or ODOT.
4. Entering into any legal agreement permitted by the statutes of the State of Oklahoma.
H. TIA Revisions. Periodic updates or revisions to the TIA may be required to address issues or identify changes to the Level of Service at study intersections and streets. These updates shall address modifications to the magnitude and timing of improvements recommended by the original TIA. Any TIA amendment must be acceptable to the City, and Tulsa County or ODOT, when applicable.
I. Off-Site Improvements.
1. Based on the TIA results and other instances where the City finds that public safety is at risk, the subdivider or developer may be required to make improvements to off-site streets and intersections to mitigate traffic impacts generated by the subdivision or development.
2. When off-site improvements are required, they shall be roughly proportional to the impact of the proposed subdivision or development.
3. The City may participate in the costs of oversizing public improvements with the subdivider or developer, subject to the City’s cost participation policies and procedures.
J. Construction Easements. Temporary construction easements, in addition to rights-of-way, may be required when adequate width for street and/or utility construction staging is not available. The subdivider or developer is responsible for obtaining any required temporary construction easements. (Ord. 747, 11-14-2017)