fA^rt/i CawCina 'Department of Transportation Stateunde (Planning 'Branch llrban Studies Unit Highlands Thoroughfare Plan Technical Report N.C. DOCUMENTS CLFARiNGHCHJSE ^CvveSW^^ ■"^^x. JAN 7 1998 [^ LIBRARY OF NORIH CAiOUNA flALBGH QUAM ^^^ '^^^i- ''*'*X^"^;^.?r.^''::--'"' September, 1997 Thoroughfare Plan Report for Highlands, North Carolina Prepared by the: Statewide Planning Branch Division of Highways N. C. Department of Transportation In Cooperation with: The Town of Highlands The Federal Highway Administration U. S. Department of Transportation r :* SEAL : = 5 : 21120 J z E. D. McDonald, II, P.E. Thoroughfare Planning Engineer Digitized by the Internet Archive in 2012 with funding from LYRASIS IVIembers and Sloan Foundation http://archive.org/details/thoroughfarepl1997nort ACKNOWLEDGEMENTS Persons Responsible for this Report: Project Engineer: E. D. McDonald, II, P.E. Urban Studies Unit Head: D. S. Hutchings, P.E. Manager, Statewide Planning Branch: M. R. Poole, Ph.D., P.E. Engineering Technician: Jocelyn Jones Jim Neely Table of Contents Chapter Page 1. Introduction 1 2. Thoroughfare Plan Recommendations 5 3. Alternatives Analysis 9 4. Existing and Projected Conditions 15 5. Implementation 29 6. Conclusion 39 Appendix A. Thoroughfare Planning Principles 41 B. Thoroughfare Plan Street Tabulation 49 C. Typical Cross Sections 51 D. Recommended Subdivision Ordinances 59 List of Figures Figure Page 1. Geographic Location of Highlands 3 2. Recommended Thoroughfare Plan 7 3. Project Alternatives 11 4. Land Use 19 5. Existing and Projected AADT 23 6. Persons per Vehicle Trend 25 7. Idealized Thoroughfare Plan 43 8. Typical Thoroughfare Cross Sections 55 List of Tables Table Page 1. Population 16 2. Percent Change in Population 16 3. Employment Trends in Macon County 17 4. Minimum Levels of Service for Roads and Highways 22 5. Minimum Tolerable Lane Widths 27 6. Environmental Considerations 36 7. Cost Estimates - Benefits - and Probable Impacts 37 8. Minimum Right-of-way Requirements 62 9. Design Speeds 64 10. Sight Distance 64 11. Maximum Vertical Grade 65 12. Superelevation 66 13. Metric Conversion Table 68 14. Metric Measurement Equivalents 68