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SR 109 Access Management Study Corridor Management Committee Kickoff Meeting June 9, 2014
Agenda • Welcome and Introductions • What is Access Management? And, why is It Important? • Scope of Services for SR 109 project • Project Schedule • Next Steps
What is Access Management? Why is it Important? • Access Management is the careful consideration of the location, type and design of vehicular access points to a roadway. • It is the recognition that vehicular maneuvers and volumes at each access point will have specific and accumulative consequences to the flow and safety of the street for all user types.
When Access Principles are Applied to a Specific Corridor • Crashes are reduced by 30 to 60 percent • Capacity is increased by 20 to 40 percent Demosthenes
Business Benefits Commercial businesses depend on efficient transportation services. Retail market areas are determined in part by travel time. Non-retail business - manufacturing, distribution, service providers and offices are best served by safe and efficient roadways for employees, and movement of goods and services.
Good for the Community • Better travel time to work, recreation, and shopping • Safer for families – fewer major crashes • Tax dollar investment lasts longer
When Access is Not Managed • Increased vehicular crash rates • Decreased pedestrian and cyclist safety • Reduced roadway efficiency • Encourage strip development • Increased travel time for everyone • Decreased market area for retail and employment.
Roadways are the Most Dangerous Public Facilities on the Face of the Earth • Each day about 92 people die (2012) • Over 15,000 Crashes each day • Over 4,100 Injuries each day
Which means: one person of every 90 born today will die violently in a motor vehicle crash. 70 out of every 100 will be injured at some point in their lives. AASHTO Strategic Highway Safety Plan
The most likely cause of the death of a child is a traffic accident. AASHTO Strategic Highway Safety Plan We Know that • The most likely cause of accidental death of an adult is a traffic accident
We Know that at Intersections • 27.3 % of all reported crashes • Almost 25% of all traffic fatalities • Almost 50% of all traffic injuries • About 55% of all crashes are related to access • Traffic signals increase crash frequency National Intersection Crash Statistics
Business Market Area Shrinks as Arterial Speed is Reduced by Congestion and More Traffic Signals. Source: Florida DOT Assuming a 20 minute trip, dropping from average speed of 35 mph to 25 means over 50% reduction in market area.
Estimated Savings in Travel Time & Delay: 1/2 v. 1/4 Signals + Side Friction in 5 Miles
There is No Such Thing as a Safe Access. • As the number of access points per mile increase, so does the frequency of crashes. • And the rate also increases. • 40 driveways per mile will increase crashes by 60% compared to 20 per mile. • Each access = 4% NCHRP 420
Every Access Point is Fundamentally a Safety Problem • Issuing an access permit is a decision to diminish public safety and roadway function. Photo by Dr. J. L. Gattis, U of Arkansas
2-Lane Crossing 2-Lane • The center box is where serious injuries are most likely • 32 total conflicts
Designing for Safety is About Limiting and Managing Vehicular Conflicts • If you reduce the Rate at which a motorist encounters conflicts you will reduce the Rate of crashes. • If you reduce the speed differential of crashes there will be fewer injuries.
Goal of Access Management • Separate turning vehicles from through traffic • Provide left and right turn lanes
Goal of Access Management Limit access conflicts and severe types Source: Florida DOT
AM on Arterials is All about Local Street Networks • Local safe streets, connecting friends, safe routes to schools, sidewalks, bicycle routes • No homes with direct driveways to an arterial, or even a collector
Open 4 leg intersection • 22 crossing conflicts “kill zone” • 8 merging • 8 diverging Graphic from Teachamerica and Florida DOT
Roundabouts have No Crossing Conflicts • 24 angle conflicts for 2 lane RBTs • 8 angle conflicts for single lane RBTs • The “Kill Zone” crossing conflicts are gone
Safer residential access Goal of Access Management
Goal of Access Management • Keep private access off arterials Demosthenes
Land use planning and project design decisions do establish long term crash rates • Planning decisions determine access need, location, frequency, type and traffic volume - thereby establishing roadway conflict rates.
Study Goals and Objectives • Develop an Access Management Plan that establishes standards and policies for the location, spacing, design and operation of: • Driveways • Street connections • Median openings • Traffic signals • Interchanges
Major Tasks and Task Leaders Nashville Area MPO Michael Skipper Executive Director Project Steering Committee TDOT Wilson County TDEC City of Gallatin Nashville MPO City of Lebanon Sumner County City of Portland Principal in Charge Marshall Elizer, PE, PTOE GS&P Project Manager John Houghton, AICP GS&P Task 2 Public Outreach, Stakeholder, and Media Outreach Task Leader Lindsay Puckett, AICP GS&P Kevin Tilbury, AICP Cindy Frear GS&P Stephen Stansbery, AICP KHA Sharon Younger, PhD Younger Associates Task 3 Technical Review and Analysis of Historic, Existing and Future Conditions Task Leader Kevin Tilbury, AICP GS&P Nithin Gomez, PE Andrew Gaskins GS&P Allison Fluitt, PE, AICP KHA Tasks 4 & 5 Existing Guidelines and Practices & Access Management Resource Kit Task Leader John Houghton, AICP GS&P Phil Demosthenes PD Diane Regensburg, PE Patrick Leap, PE Andrew Gaskins GS&P David Coode, AICP Christopher Rhodes, PE KHA Tasks 6 Corridor Specific Access Management Plan Task Leader Jay Bockisch, PE, PTOE GS&P Patrick Leap, PE Andrew Gaskins GS&P Phil Demosthenes PD Christopher Rhodes, PE Stephen Stansbery, AICP Timothy White, PE, PTOE KHA Task 7 Final Documentation Task Leader Lindsay Puckett, AICP GS&P Patrick Leap, PE Andrew Gaskins, AICP GS&P Phil Demosthenes PD Allison Fluitt, PE, AICP Stephen Stansbery, AICP KHA
Setting the Stage • What are the opportunities and challenges in the corridor?
Setting the Stage • How is access managed in the corridor today?
Setting the Stage • What strategies and tools can we use to improve access management in the corridor?
Access Management Plan • Shared Vision for the Corridor • Access Categories • Recommended Improvements
Next 90 Days • Develop and submit Project Management Plan (Task 1) & Public Involvement Plan (Task 2) • Initiate Review & Analysis of Existing Conditions and Trends (Task 3) • Initiate Documentation & Assessment of Existing Access Management Practices (Task 4) • Initiate Development of Access Management Resource Kit (Task 5) • Convene Project Steering Committee Meeting #2