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Lake Johanna Boulevard <br />Trail Design Study <br />Preliminary Design Development Report 17 September 27, 2022 <br />Design Study Considerations <br />Design considerations were identified to develop, evaluate and prioritize the potential trail alignments. They <br />included: <br />x User Experience Criteria: Sense of safety, intuitive wayfinding, proximity to natural areas and comfort. <br />x Connectivity Criteria: Connections to neighborhoods, local parks, Lake Johanna and trails. <br />x Scope of Roadway Modification Improvements Criteria: Scale of reconstruction and realignment. <br />x Crossings/Conflicts Criteria: Visibility at crossings, length of crosswalks, private driveways and local <br />streets. <br />x Grading/Retaining Wall Scope Criteria: Scale of grading and/or wall construction necessary to fit trail. <br />x Right of Way/Easement Needs Criteria: Scale of anticipated property acquisition (temporary and <br />permanent). <br />x Surface Utility Conflicts Criteria: Power poles, hydrants, manholes and communications pedestals. <br />x Cost Criteria: Estimated project costs including design, construction and right of way acquisition. <br />Trail Design Concepts <br />Figure 10. East/South Side Concept, Typical Section A (left) and West/North Side Concept, Typical Section A (right) <br /> <br />The project team developed and evaluated two potential alignments, an east/south side option and a west/north <br />side option. The draft trail design concepts are included in Appendix D. The following provides a synopsis of the <br />key elements of these two potential alignments. <br />Roadway Improvements <br />The existing roadway pavement is proposed to be narrowed to accommodate the trail while minimizing <br />construction beyond existing roadway pavement limits. Portions of roadway pavement would require milling and <br />overlay to accommodate the new roadway widths and centerline. <br />Roadway intersection treatments include curbed bump outs to improve safety of pedestrian crosswalks by <br />narrowing the crosswalk lengths, enhancing visibility of pedestrians and providing space for ADA compliant ramp <br />infrastructure. <br />Trail Improvements <br />The proposed trail improvements include a continuous 10-foot-wide multi-use trail along one side of Lake Johanna <br />Boulevard. A 6-foot turf boulevard will provide separation of the trail from the roadway as well as room for snow <br />storage, signage, streetlighting and boulevard trees if desired by the City of Arden Hills. A minimum 2-foot clear