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HomeMy WebLinkAboutRight Turn Deceleration Lane Letter_04072026 www.focus-es.com 1001 N Rosario Street Suite #100 Meridian, ID 83642 208.974.0075 To: City of Rexburg From: Jason Watson, PE, PTOE FOCUS Engineering & Surveying, LLC File: Right Turn Deceleration Lane – Mikan Drive and Tamana Drive Date: May 7, 2026 Reference: Right Turn Deceleration Lanes along University Blvd This memorandum is in response to discussion on the need for deceleration lanes along University Blvd at the Mikan Drive and Tamana Drive intersections, as outlined in the original traffic study for the University Towne Center, dated October 29, 2025. For major roads at an intersection, the City of Rexburg Transportation Master Plan Deceleration Lanes for Right Turning Vehicles was used. Within this study area, University Blvd would follow the major roadway analysis, where Tamana Drive and Mikan Drive would fall under the minor roadway analysis. As part of this analysis, we looked at both the existing traffic using these two roadways and also the 2040 Total Traffic scenario for the full buildout of the University Towne Center. The following Advancing Volumes and right turn volumes were used under the 2025 Existing and 2040 Total Traffic scenarios. Tamana Drive & University Blvd: The following right turn analysis was performed using the Deceleration Lanes for Right Turning Vehicles from the City of Rexburg Transportation Master Plan for evaluation of a westbound right turn lane at Tamana Drive under the 2025 Existing scenario. 2025 Existing Traffic Westbound Right Turn Lane: Does Warrant Major Road Speed Limit = 45 MPH AM Westbound Right Turn Volume = 1 vph AM Highway Volume (Outside Lane Only) = 282 vph PM Westbound Right Turn Volume = 27 vph PM Highway Volume (Outside Lane Only) = 268 vph Mikan Drive & University Blvd: The following right turn analysis was performed using the Deceleration Lanes for Right Turning Vehicles from the City of Rexburg Transportation Master Plan for evaluation of a westbound right turn lane at Mikan Drive under the 2025 Existing and 2040 Total Traffic scenario. 2025 Existing Traffic Westbound Right Turn Lane: Does Not Warrant Major Road Speed Limit = 45 MPH AM Eastbound Right Turn Volume = 1 vph AM Highway Volume (Outside Lane Only) = 209 vph Right Turn Deceleration Lane – Mikan & Tamana Page 2 of 2 1001 N Rosario Street Suite #100 Meridian, ID 83642 208.974.0075 www.focus-es.com PM Eastbound Right Turn Volume = 2 vph PM Highway Volume (Outside Lane Only) = 259 vph 2040 Total Traffic Westbound Right Turn Lane: Does Warrant Major Road Speed Limit = 45 MPH AM Eastbound Right Turn Volume = 36 vph AM Highway Volume (Outside Lane Only) = 365 vph PM Eastbound Right Turn Volume = 44 vph PM Highway Volume (Outside Lane Only) = 450 vph Based on the Deceleration Lanes for Right Turning Vehicles from the City of Rexburg Transportation Master Plan, if the number of vehicles making a right turn exceeds 5 vehicles during a peak hour, then a right turn lane is warranted. Therefore, a westbound right turn lane is warranted at the Tamana Drive and University Blvd intersection under the 2025 Existing scenario (without University Towne Center), based on the traffic volumes illustrated in the original University Towne Center traffic impact study. A westbound right turn lane is also warranted at the Mikan Drive and University Blvd intersection under the 2040 Total Traffic scenario (with the University Towne Center), based on the traffic volumes in the same study. This right turn lane would be needed with the completion of Phase 3 of the University Towne Center project. Please feel free to contact me with any questions or comments. Sincerely, FOCUS CONSULTING Jason Watson, PE, PTOE Transportation Department Manager 801.352.0075 jwatson@focus-es.com 05/07/26