Arterial Grid Analysis Study Final Report, 3/2007
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WORK ORDER #GPCil-15: Arterial Grid Analysis Study Final Report Prepared for: Miami-Dade County Metropolitan Planning Organization (MPO) Prepared by: Kimley-Horn and Associates, Inc. Fort Lauderdale, Florida ãKimley-Horn and Associates, Inc. March 2007 040829009 Arterial Grid Analysis Study Table of Contents Introduction ................................................................................................................................1 Background.................................................................................................................................2 Benefits of a Grid Roadway System........................................................................................2 Historical Development of a Grid Roadway System in Miami-Dade County............................4 Study Need .............................................................................................................................5 Study Objective ......................................................................................................................6 Study Methodology.................................................................................................................6 Review of Previous Work .......................................................................................................6 Coordination and Meetings..........................................................................................................9 Data Collection .........................................................................................................................10 Existing Conditions Analysis.....................................................................................................12 Traffic Count Availability.....................................................................................................12 Annual Average Daily Traffic...............................................................................................12 Laneage ................................................................................................................................13 Functional Classification.......................................................................................................13 Right-of-Way........................................................................................................................13 Level of Service....................................................................................................................13 Discontinuities ......................................................................................................................14 Review of Current Plans and Programs......................................................................................17 Future Conditions Analysis .......................................................................................................18 Project Screening ......................................................................................................................20 Initial Screening of Potential Projects....................................................................................20 Broward County Connectivity...............................................................................................25 Conceptual Level Impact Analysis ........................................................................................27 Recommendations.....................................................................................................................31 Project Recommendations.....................................................................................................31 Policy Recommendations......................................................................................................32 Summary and Conclusion..........................................................................................................35 G:\040829009-MPO Arterial Grid\Reports\Final\Revised Report\Report.doc i March 2007 Arterial Grid Analysis Study List of Tables Table 1. Locations of Additional Traffic Counts........................................................................11 Table 2. Miami-Dade County’s Projected Traffic Growth Rate (2030 LRTP) ............................18 Table 3. Minimum Right-of-Way Requirements........................................................................21 Table 4. Type I Projects –County Arterial Roadways................................................................21 Table 5. Type I Projects –County Collector Roadways .............................................................22 Table 6. Type I Projects –State Roadways ................................................................................22 Table 7. Type II Projects –Missing Links .................................................................................23 Table 8. Type III Projects –County Arterial Roadways .............................................................23 Table 9. Type III Projects –County Collector Roadways...........................................................24 Table 10. Type III Projects –State Roadways............................................................................24 Table 11. Comparison of Matching Roadways at Broward County Line (Except Expressways)..26 Table 12. Conceptual Level Impact Analysis for Type I Projects –County Arterials..................28 Table 13. Conceptual Level Impact Analysis for Type I Projects –County Collectors................29 Table 14. Conceptual Level Impact Analysis for Type I Projects –State Roadways...................29 Table 15. Conceptual Level Impact Analysis for Type II Projects –Missing Links ....................29 Table 16. Conceptual Level Impact Analysis for Type III Projects –Arterial Roadways ............30 Table 17. Conceptual Level Impact Analysis for Type III Projects –Collector Roadways..........30 Table 18. Potential Projects Identified in LRTP.........................................................................31 Table 19. Arterial Grid Analysis Study – Recommended Capacity Projects ..............................32 List of Appendices Appendix A. Review of Previous Work –Superarterial Network Study Appendix B. Study Advisory Committee (SAC) Meeting Presentations Appendix C. Arterial Grid Databases Appendix D. Existing Conditions Map Series Appendix E. Future Conditions Map Series Appendix F. Potential Projects G:\040829009-MPO Arterial Grid\Reports\Final\Revised Report\Report.doc ii March 2007 Arterial Grid Analysis Study Introduction The objective of this study is to address arterial grid operations in Miami-Dade County and study potentially increasing the efficiency and capacity of the established grid system, principally along section line and half-section line roadways. This study is intended to determine whether improvements could be made to the grid system as a long-term traffic congestion relief measure, rather than stop-gap improvements that may slightly improve traffic flow in one corridor while potentially “shifting”the problem to a different corridor. In addition to the capacity improvements, the study will attempt to identify policy recommendations to support improving the efficiency of the arterial grid roadway system. This report summarizes the study background, objectives, data collection, existing conditions analysis, future conditions analysis, project screening, and recommendations. In addition, the appendices of this report contain important study information including presentations given to the Study Advisory Committee (SAC) and geographic information systems (GIS) maps depicting level of service (LOS), laneage, right-of-way (ROW), and potential projects. March 2007 1 Arterial Grid Analysis Study Background The roadway network throughout much of Miami-Dade County is comprised of a grid system of arterial roadways, collectors, and local streets. This grid system creates many travel benefits such as several alternative travel paths for individual trip pairs, an easily-definable functional hierarchy centered around section and half-section line roadways, and a logical naming convention that can allow visitors to quickly become familiar with local roadways. However, this type of roadway arrangement also presents several challenges to transportation planners including limiting cut- through traffic on local streets, and difficulty when designing complex intersection geometries where diagonal roadways such as U.S. 1 cross the grid system. In general, section line roadways in Miami-Dade County serve as the principal arterial roadway system. Section line roadways are spaced at one-mile intervals in both east-west and north-south directions. In Miami-Dade County, streets run east-west and are spaced every 1/16 of a mile. When traveling north-south through the County, one mile is approximately equal to the distance traveled between 16 streets. Examples of east-west section line streets include SW 8th Street, SW 24th Street, and SW 40th Street. Avenues in Miami-Dade County run north-south and are spaced every 1/10 of a mile. When traveling east-west through the County, one mile is approximately equal to the distance traveled between 10 avenues. Examples of north-south section line avenues include NW 47th Avenue, NW 57th Avenue, and NW 67th Avenue. Benefits of a Grid Roadway System Numerous interconnected north-south and east-west roadways characterize a grid system of roadways. Such a grid road system provides enhanced connectivity and accessibility