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Item 9C - Attachment F_Kimley Horn Draft Traffic ReviewKimley)))Horn Ken Baker To: Senior Director of Planning & Development Services City of Southlake, TX Tom Grant, P.E., PTOE From: Brendan Yarborough, P.E. Kimley-Horn and Associates, Inc. Texas Registered Eng. Firm No. F-928 Date: June 311, 2022 Page 1 DRAFT I June 311, 2022 This document is released for the purpose of interim review under the authority of Brendan Yarborough, P.E. It is not to be used for construction, bidding, or permit purposes. Brendan Yarborough Name 140342 Texas Serial No. 6/3/2022 Date Subject: Proposed Public Library Options - Preliminary Initial Traffic Review, Southlake, Texas At the City of Southlake's direction, Kimley-Horn and Associates, Inc. reviewed three locations, identified by the City of Southlake Library Task Force, for an initial review of ingress/egress. This document is not a formal traffic impact analysis (taking traffic counts, analyzing intersections, determining site access and off -site infrastructure improvements), which will likely need to be performed for the location that is chosen. This was a review of existing information and information provided by the Library Task Force Site Evaluation Report dated May 26, 2022. All four figures included in this memorandum are from the Library Task Force Site Evaluation Report. The public library is expected to be approximately 30,000 square feet with the potential of an additional 15,000-30,000 square foot performing arts center. The three locations (see Figure 1) identified by the Library Task Force include the Parkwood Drive property, Bicentennial Park, and within the proposed Carillon Parc development. The City of Southlake's library hours are expected to be from 10:OOAM — 8:OOPM Monday -Friday, 10:00 AM — 6:00 PM Saturday, and closed on Sundays. The performing arts center would have separate hours and anticipated to be in use during the late afternoon or early evening. Since the library opens after the AM rush hour, only the PM rush hour was considered for the review. A 30,000 square foot library typically generates 245 PM peak hour trips (118 entry, 127 exit) based on ITE's Trip Generation Manual. A performing arts center is not identified in ITE's Trip Generation Manual; however, Kimley-Horn reviewed two similar land uses (Church on a Sunday and movie theater on a Saturday) that have trip generation data based on the number of seats. Both land uses used similar rates for the PM peak hour of approximately 0.5 vehicles per seat. Based on conversations with the Library Task Force, it is anticipated that the performing arts center would house 300 visitor seats. Assuming 0.5 vehicles per seat, it is assumed that there will be approximately 150 vehicles entering during a fully occupied performance. Though the library and performing arts center will be in the same building, they will likely have different peaks. We have assumed the library will have a peak traffic on a weekday during the PM rush hour while we anticipate the performing arts center to have more of a weekend peak traffic event in the evening. Kimley)))Horn Figure 1 Three Potential Library Sites PARKWOOD PROPERTY SITE Page 2 DRAFT I June 3", 2022 The Parkwood property site is located at Byron Nelson Parkway and Parkwood Drive one block south of Southlake Blvd (FM 1709). The site is across from Rockenbaugh Elementary School. Based on the City of Southlake's 2018 Traffic Count Report, Byron Nelson had approximately 4,370 vehicles per day in 2017. The General Concept Plan is provided in Figure 2. 4 im i# qV 4F a 0 is49 . Figure 2. Parkwood General Concept Plan Kimley)))Horn Site Observations Page 3 DRAFT I June 311, 2022 • The general concept plan proposes good site access —two driveways along the street easement on the north side and two driveways along Byron Nelson Parkway. • Byron Nelson Parkway has existing sidewalk on both sides of the street in the vicinity of the property. • The street easement parallels Southlake Boulevard (FM 1709) and can be accessed from Byron Nelson Boulevard from the east or Parkwood Drive from the west. • During the school PM rush hour, Byron Nelson was observed to be congested. The additional access along the street easement will help library visitors avoid the school traffic. Recommendations (if site is chosen) • If the Parkwood site is selected, a further traffic study for site access and off -site improvements should be performed. • Consider constructing a southbound right -turn lane along Byron Nelson Parkway at the street easement so traffic does not queue to Southlake Blvd (FM 1709). This may require right-of-way acquisition and sidewalk improvements. The right -turn lane may impact the driveway to the west of Byron Nelson. • Consider constructing a southbound right -turn lane at one of the proposed site driveways along Byron Nelson. • Provide an enhanced pedestrian crossing (e.g., rectangular rapid flashing beacon) to cross Byron Nelson between the school and the library (exact location of crosswalk to be confirmed with traffic study). • If the existing Parkwood Center is used for overflow parking, construct sidewalk between overflow parking to proposed library. • Consider constructing a sidewalk on the north side of Parkwood Drive and on the south side of the street easement. • Monitor the intersection of Byron Nelson Parkway at Zena Rucker Road for a future traffic signal. Kimley)))Horn BICENTENNIAL PARK SITE Page 4 DRAFT I June 311, 2022 The Bicentennial Park property site is located at White Chapel Boulevard and Unity Way one block north of Southlake Blvd (FM 1709). The site is just to the east of a large sports complex. Based on the City of Southlake's 2018 Traffic Count Report, White Chapel Boulevard had approximately 20,000 vehicles per day in 2017. White Chapel Boulevard has been under construction for a couple of years and will open as a 4-lane divided roadway. It is expected that traffic will increase along White Chapel once construction is complete. The General Concept Plan is provided in Figure 3. Figure 3. Bicentennial General Concept Plan Site Observations • The preliminary concept plan only shows one driveway access off of Unity Way. This is an existing driveway that is one lane in each direction. • Unity Way is one lane in each direction (with a raised median) except at the intersection of White Chapel where eastbound is widened to two lanes. • During sport events, traffic along Unity Way could be high and cause traffic queues. • Staff for the water tower access and Parks and Recreation Department will continue to use the existing driveway off of Unity Way and gravel driveway off White Chapel Boulevard. This may include traffic with heavy industrial equipment. Recommendations (if site is chosen) • If the Bicentennial Park site is selected, a further traffic study for site access and off -site improvements should be performed. • Widen the existing southbound driveway approach to Unity Way to allow two lanes out (left turn lane and right turn lane) and one lane in. • Provide another driveway access from White Chapel Boulevard. This may be a new driveway or may be shared with the existing gravel driveway. If the driveway is combined with the existing Kimley)))Horn Page 5 DRAFT I June 311, 2022 gravel driveway, the adjacency to the City utilities would need to be reviewed and appropriate setbacks maintained. This would also require additional security improvements surrounding the water tower to keep visitors a safe distance away from the tower. • Monitor the intersection of White Chapel Boulevard at Unity Way/Emerald Boulevard for future traffic signal. • Provide an enhanced pedestrian crosswalk at Unity Way and White Chapel Boulevard to provide pedestrian access from the residential side. • Construct an additional westbound lane between White Chapel and the existing driveway to prevent queues from backing onto White Chapel Boulevard. This may require additional site improvements such as a retaining wall due to grading on the site. CARILLON PARC SITE The Carillon Parc property site is located at White Chapel Boulevard and State Highway 114 westbound frontage road. The library site would be in the pink area in the southeast corner which is included in a larger development which includes townhomes, retail, restaurants and office space. There was a traffic impact analysis completed for this site in 2018 which provided off -site recommendations. The General Concept Plan is provided in Figure 4. Site Observations EAST KIRKW�ao 9l+rt1. - LEGEND u � uer�ne I -a^.. welw.a Uke d�- 2.awr w^w�^.4fnenY /d`AYb� � W^aer P-Mp MfIW'r[ � Ww.kr3-awu rxa.✓K Od.grrYw XYiq � 4Gr Imp ❑rl[ •, : _ _ • Ark W !n� a rc40e nar I�YrK o�.. xew Yw1 NON-YM! tlMfq H �pn P.i epab tanO Q^ wpnanK M'W ...I• ii.. k4 Figure 4. Carillon Parc General Concept Plan • Site access would be from White Chapel Boulevard and State Highway 114 Westbound Frontage Road. • The general concept plan proposes good site access from multiple roads for ultimate buildout of Carillon Parc Development. • The Carillon Parc development has not started construction west of Riviera Lane. Kimley)))Horn Page 6 DRAFT I June 311, 2022 • There will not be access to the library site from Riviera Lane (north/south road on east side of property). Carillon Parc Traffic Impact Analysis (2018) Recommendations • The southern driveway connection from White Chapel Boulevard to the commercial part of the site should be constructed with 2 westbound outbound lanes, a southbound left -turn deceleration lane, and a northbound right -turn deceleration lane. • The driveway connection to State Highway 114 Westbound Frontage Road should be constructed with a westbound right -turn deceleration lane. Recommendations (if site is chosen) • Assuming the library gets developed before the rest of the Carillon Parc development, the driveway access from SH 114 Westbound Frontage Road should be constructed along with the right -turn deceleration lane in conjunction with the library. • Assuming the library gets developed before the rest of the Carillon Parc development, consider a secondary access point from White Chapel Boulevard in the interim so that access is not just limited to the SH 114 Westbound Frontage Road. • Assuming the library gets developed before the rest of the Carillon Parc development, consider building a temporary surface parking for the library in the interim until rest of the site is developed.