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Access Management: South Carolina’s Experience

Access Management: South Carolina’s Experience. Rick Werts Director of Traffic Engineering South Carolina Department of Transportation. Presentation Outline. What is access management? Resources SCDOT’s experience Current updates School access design Conclusions.

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Access Management: South Carolina’s Experience

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  1. Access Management: South Carolina’s Experience Rick Werts Director of Traffic Engineering South Carolina Department of Transportation

  2. Presentation Outline • What is access management? • Resources • SCDOT’s experience • Current updates • School access design • Conclusions

  3. What is Access Management? Access management is the systematic control of the location, spacing, design, and operation of driveways, median openings, interchanges, and street connections to a roadway. It also involves roadway design applications, such as median treatments and auxiliary lanes, and the appropriate spacing of traffic signals.

  4. www.accessmanagement.gov

  5. Resources

  6. Additional Resources • Links to state DOT websites and manuals • NCHRP research reports • National conference information • Past conference proceedings • Outreach programs • Training opportunities

  7. TRB’s Access Management Manual

  8. SCDOT’s Experience Graphics Slide Background • Increased growth in South Carolina • Congestion has created a need for more specific access management guidelines • Update current guidelines (1996) based on recommended practice from TRB’s Access Management Manual

  9. Driveway Design Elements • Driveway design elements (width & radii) based on driveway classifications

  10. Driveway Design Elements

  11. Throat Lengths

  12. Driveway Spacing • Spacing based on speed limit and AADT

  13. Corner Clearances

  14. Interchange Areas

  15. New School Sites • Access Problems due to: • Site Selection • Inadequate internal storage • Lack of turn lanes on roadway • No traffic engineer in planning process

  16. New School Sites • Planning Efforts undertaken: • Met with State Education Department • Expressed concern with site selection and school layouts • Asked to be included in planning stages

  17. School Access Design • The Office of School Facilities Manual states: The SCDOT shall be consulted for roadway improvements whenever stacking loops or access to a school is modified, or whenever a new school is planned, or an addition that increase the number of students is planned. Access to a school site shall be defined by the SCDOT Traffic Engineering Division as part of the encroachment permit process.

  18. School Access Design • Conduct an initial site review with School District representatives to identify potential access locations and roadway improvements • Review detailed plans and provide any recommendations needed for final approval prior to issuing permit

  19. Guidelines for School Transportation Design

  20. School Access Design • On-Site Stacking Lengths requirements (900 ft-1,500 ft) • Driveway Spacing requirements (600 ft. min)

  21. School Access Design • Driveway lane widths and corner radii

  22. Results of Planning Efforts • New schools open with minimal traffic problems • No roads are blocked by stacking traffic

  23. Conclusions • Good planning yields good results • Good access standards lead to less traffic congestion and lower vehicle crashes

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