US 41AT CR - 340 - - STAGE 2 ICE Alachua County (26030000; MP 25.586) Prepared by I Peters and Yaffee, Inc. Prepared for I FDOT District Two FDOT Professional Engineer Certificate I, Austin Chapman, PE 72474, certify that currently hold an active license in the State of Florida and am competent through education or experience to provide engineering services in the civil discipline contained in this plan, print, specification, or report. Project US 41 at CR 340 Stage 2 ICE Location Alachua, Florida Client FDOT District Two THIS ITEM HAS BEEN DIGITALLY SIGNED AND SEALED BY 2025.01.22 19:19:09 Austin P Chapman -05'00' ON THE DATE ADJACENT TO THE SEAL PRINTED COPIES OF THIS DOCUMENT ARE - - € NOT CONSIDERED SIGNED AND SEALED AND THE SIGNATURE MUST BE VERIFIED No 72474 ON ANY ELECTRONIC COPIES. * PETERS AND YAFFEE, INC. STATE OF 9822 TAPESTRY PARK CIRCLE, SUITE 205 G LORIDP JACKSONVILLE, FL 32246 ONAL €t AUSTIN CHAPMAN, P.E. 72474 US 41 AT CR 340 STAGE 2ICE Table of Contents Background 1 ICE Purpose. - 1 Stage 2 ICE Key Variables Stage 2 ICE Evaluation 1 Stage 2 ICE Results. Appendices Appendix A FDOT Stage 2 ICE Forms Appendix B SPICE Worksheets Appendix C FDOT Economic Analysis Tool for ICE Worksheets Appendix D Concept Diagrams Appendix E Cost Estimates Appendix F Synchro Capacity Analysis Worksheets Appendix G Stage 1 ICE Analysis US 41 AT CR 340 STAGE 2 ICE Background FDOT District Two Traffic Operations initiated an investigation into whether the US41/CR 340 intersection met warrants for signalization. US 41 is a two-lane undivided rural principial arterial that runs in a north/south alignment, with a posted speed limit of 40 mph, which reduces to 30 mph approximately 300 feet north of the intersection. US 41 is in the C3C context classification south of CR 340 and the C2T context classification north of CR 340, The intersection was found to meet MUTCD Warrant 1 (eight-hour) and Warrant 2 (four-hour) at the 70% threshold for signalization. Warrant 1 was met at the 100% threshold even if a turn lane was added to CR340.. A delay study identified a level of service "E" for eastbound CR 340 vehicles during the AM and PM peak period. There were seven potentially correctable crashes from 1/1/2019 until 8/16/2024. The maximum number of potentially correctable crashes that occurred within a 12- month period was three collisions between April 2023 and March. 2024. There were no fatal crashes. Following the signal warrant analysis, a Stage 1 Intersection Control Evaluation (ICE) was completed. It was determined that a Traffic Signal and one-lane roundabout should be advanced to Stage 2 for further analysis. ICE Purpose The purpose of ICE is to consider the projected safety and operations of multiple context-sensitive control strategies for new or modified intersections. This analysis promotes thoughtful consideration of alternative intersection types using quantitative analysis for each control type. Stage 1 is a screening stage and uses FHWA's Capacity Analysis for Planning of Junctions (CAP-X) for operational analysis and FHWA's Safety Performance of Intersection Control Evaluations (SPICE) for safety analysis to determine which options proceed to Stage 2. Stage 2 utilizes more detailed project data and analysis to perform a benefit to cost calculation which considers both projected safety and operational data. Stage 2 ICE Key Variables The annual traffic growth rates determined in Stage 1 (1% for US 41, 2% for CR 340) were used to determine the 2036 Design Year volumes for the traffic operations analysis. The critical peak hour was determined to be the PM peak hour (5:00 PM - 6:00 PM). The opening year for the modified intersection is projected to be 2026 with a design year of 2036. Stage 2 ICE Evaluation Conceptual designs were created for the Traffic Signal and One-lane Roundabout options. These were used to establish the intersection alignment, geometry, lane requirements and right-of-way (ROW) requirements. A review of potential ROW and utility impacts of traffic control options was conducted using readily available information, RW maps and Phase Il Roadway Plans (FPI 207779-3-52-01) provided by FDOT. No design, survey, or subsurface utility exploration was completed. Therefore, this is preliminary and will need to be confirmed in design. For the Traffic Signal option, right-of-way acquisition is not anticipated. However, installing a sidewalk on the southwest corner would require relocating the electric pole at that corner. The design recommends reconstructing part of the existing sidewalk and adding pedestrian signalization on the northwest quadrant. The design also includes lane shifts through the intersection with a deflection angle of 1.5 degrees which is acceptable for the 40 mph design speed. For the One-lane Roundabout option, the concept design shows impact to properties on the northwest and southwest quadrants; therefore, right-of-way acquisition is anticipated. Two parcels in the northwest quadrant will bei impacted. According to the Alachua County Property Appraiser website, these parcels were sold in 2016 for $160,000 each, SO $300,000 is considered for the acquisition of half of each parcel. One parcel in the southwest quadrant is also anticipated to be impacted, andi it was sold in 2024 for $275,000, sO $400,000 is considered for its acquisition. The total anticipated cost for right-of-way acquisition for the One-lane Roundabout is $700,000. The Page 1 US 41 AT CR 340 STAGE 2 ICE roundabout would cut access to the southernmost Sam's Pizza and Subs driveway. This concept does not address access to the southern driveway but should be addressed during final design. Attempting to place the roundabout solely on the northwest parcels was not feasible because the approach alignment would impact an additional parcel to the west of NW 237th Street, exclude the existing east approach, and fail to accommodate the WB-62FL design vehicle. Preliminary construction cost estimates were developed based on the concepts and design knowledge. Iti is estimated that the Signalized Control will cost $1,162,322.61 to construct, and the One-lane Roundabout will cost $1,858,993.46 for both construction and right-of-way acquisition. Synchro 11 software using Highway Capacity Manual (HCM) methodologies was used to evaluate critical peak hour operations at the intersection under each control type. The Signalized Control option is expected to operate with an average delay of 19.5 seconds (LOS B) during the Design Year AM peak hour, and the One-lane Roundabout option is expected to operate with an average delay of 8.0 seconds (LOS A) during the Design Year PM peak hour. All turning movement queues can be accommodated within the proposed turn lane lengths for the Traffic Signal option. The average delays for the Signalized Control option and the One-lane Roundabout comes directly from Synchro. The SPICE Tool was used to determine the anticipated safety performance of the two options. The One-lane Roundabout received the better Crash Prediction Rank and the Safe System Intersection (SSI) rank than the Traffic Signal. The benefit to cost (B/C) analysis indicates that, as compared to Signalized Control, the One-lane Roundabout is expected to have a BIC ratio of 10.93. Stage 2 ICE Results Based on the Stage 2 ICE Analysis, it is recommended that a One-lane Roundabout be installed at the US 41/CR 340 intersection. The One-lane Roundabout received a better BICI ratio, a better Crash Prediction Rank, and a better Safe System Intersection rating compared to the Traffic Signal option. Itis also expected to operate with an acceptable level of service during the PM peak hour of the 2026 Design Year. Attached are the FDOT Stage 2 ICE Forms, SPICE Worksheets, FDOT Economic Analysis Tool for ICE Worksheets, Concept Designs, Cost Estimates and Synchro Capacity Analysis Worksheets. The Stage 1 ICE Analysis is also attached. Page 2 US 41 AT CR 340 STAGE 2 ICE Appendix