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Item 6B Consultant TIA Review ARIZONA TEXAS NEW MEXICO OKLAHOMA 7L1EEF.nanEE:nnc September 21, 2017 Steven D. Anderson, P.E., CFM City of Southlake 1400 Main Street, Suite 320 Southlake,Texas 76092 Re: Highland Corner Traffic Study—Review of Revised TIA Dear Mr. Anderson: Per your request, we have completed a review of the revised traffic study for the proposed Highland Corner development. The proposed development will be located on the southwest corner of the intersection of Kimball Avenue and Highland Street in Southlake,Texas. The traffic study was prepared by Kelly&Associates and dated September 5, 2017. Our review comments are numbered for ease of reference and the numbering does not imply any ranking. We have divided our comments into two categories — Informational Comments are those that require no action by the city or the applicant. Action Comments are those that require a response or action by the City or applicant.We offer the following comments on the submitted study. INFORMATIONAL COMMENTS(REQUIRE NO ACTION BY CITY OR APPLICANT) 1. The proposed site will include a mix of general office and medical/dental office buildings. 2. Based on an updated site plan shown in the TIA, the Highland Corner development is anticipated to include 19,256 square feet of general office space and 25,000 square feet of medical office space, with seven buildings in total. 3. The proposed development is predicted to generate approximately 111 trips in the AM peak hour (92 in and 19 out) and approximately 184 trips during the PM peak hour(41 in and 143 out). 4. The directional distribution used for this study was 20%to/from the north, 25%to/from the south, 10%to/from the east, and 45%to/from the west. 5. Existing traffic volumes were collected during the PM peak hour on Tuesday, June 27, 2017, and during the AM peak hour on Thursday, August 31, 2017. 6. The Highland Corner development will include two (2) full-access site driveways along Kimball Avenue located at existing median openings (at Yeargain Court and at Shady Lane). Northbound left turn lanes are already constructed at these median openings. Southbound right turn deceleration lanes were not proposed with this study. 3030 LBJ Freeway,Suite 1660, Dallas,TX 75234 (972)248-3006 office (972)248-3855 fax I www.leeengineering.com Page 1 of 2 7. According to the study, the driveways for the site have adequate sight distance for passenger car traffic. 8. Based on the analysis presented in this study, no changes to the roadway network are proposed external to the site to accommodate site traffic. We agree with the conclusion that no mitigation measures will be required for this development. 9. Please note that the site plan shown in the TIA(Figure 2) is still difficult to read. 10. Existing PM traffic volumes are still not grown to reflect higher expected volumes during the school year. In addition, additional growth was not applied to existing traffic volumes and no future-year analysis was performed. Analysis of future years is not anticipated to result in different conclusions, and is not required. 11. In the intersection capacity analysis,a standard peak hour factor(PHF)of 0.92 was still utilized, rather than the actual PHF present in the collected traffic volumes. However, analysis results are not anticipated to be significantly affected if the actual PHF was utilized in this case. ACTION COMMENTS(REQUIRE RESPONSE OR ACTION BY CITY OR APPLICANT) 12. There are two figures labeled Figure 4 on page 3. There are two tables labeled Table 2 in the report. 13. The study recommends that the applicant pursue a variance from the driveway ordinance for the Driveway 2 (southern driveway). Spacing between the proposed southern driveway and Southlake Glen Drive appears to be 110 feet, while 200 feet is required along an Arterial. The proposed driveway will be located at an existing median opening,therefore the request appears reasonable. 14. The study also recommends that the applicant pursue a variance from the required internal storage/throat length of 100 feet based on anticipated 95" percentile queue lengths of approximately one vehicle at each driveway. The analysis presented in the study supports the variance requested. If you have any questions, please contact me at (972) 248-3006. We appreciate the opportunity to provide these services and are available to address any additional comments or concerns. Sincerely, Digitally signed by John Denholm III,P.E. Date:2017.09.21 15:45:14 -05'00' John Denholm III, P.E., PTOE Project Manager Lee Engineering TBPE Firm F-450 LCC CnCInisine Page 2 of 2