Discussion and Consideration of Professional Services Agreement Proposal from MSA Professional Services, Inc., for Village Drive & Roberts Ferry Road Signal Design – Motion to Approve

• Use known land development and future roadway connections to develop anticipated turning movements within the next 5 years. • Complete a 5-year operational analysis of a signalized intersection using Synchro software to confirm appropriate lane designations and signal phasing. It is assumed that the existing footprint of the intersection will remain. A summary memorandum discussing the results of the operational analysis will be developed. • The operational analysis will prioritize northbound movements to ensure queues do not impact operations at the I-80 ramp terminals. • MSA will contact Iowa DOT to discuss the City’s intent to install a signal at the intersection. The operational assessment memorandum will be provided. If Iowa DOT requires additional information or analysis, it will be completed as part of a contract amendment. Traffic Signal Plans • Develop traffic signal plans to include the following: • Layout showing the location of poles, signal heads, cabinets, handholes, detection, and conduits. • The location, orientation, and legend/indications of traffic signal heads and signs. • A schematic wiring diagram detailing the size and type of cables and conduits. • Phasing, timing, and operation of the controller and associated equipment. • Specification of equipment, materials, and construction methods. • The City of Tiffin will confirm equipment preferences related to: • Emergency Vehicle Preemption (EVP) • Camera Detection • Traffic Signal Controller • Other misc. equipment • Roadway lighting will be combined with the traffic signal poles. • New pavement marking plans will be included with the signal plans. • Standard design bases are assumed and anticipated for this location. Nonstandard details design for signal bases in not anticipated or included as part of the signal plans. • Traffic Control Design: For installation of the signals and curb ramps, single-lane closures of right turn lanes may be required. No detour is assumed. During construction, the intersection will remain two-way stop-controlled. • Erosion Control Design: Determine location and type of erosion control devices needed to meet regulatory requirements. Minimal group disturbance is anticipated, but isolated areas are assumed and restoration will be required. • It is assumed Type A Foundations for signals can be used. No Geotechnical investigations is included or anticipated. If bedrock is encountered, it is assumed the contractor will investigate and confirm the need for a Type B or Type C foundation. Pedestrian Path and Curb Ramps • A new sidewalk crossing and associated curb ramps will be added on the east approach of the intersection. • A new 10-foot-wide multiuse trail crossing and associated curb ramps will be added to Page 3 of 6 (Attachment A: Scope of Services) https://msaproserv-my.sharepoint.com/personal/ainhelder_msa-ps_com/Documents/Documents/13603027 Task Order - Village Drive & Roberts Ferry Signal.docx