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CENTRAL HEALDSBURG AVENUE PLAN
TONIGHT’S AGENDA
16 November
 Introduction to CHASSA
 Forum #1: ‘TRANSPORATION + MOBILITY...
CENTRAL HEALDSBURG AVENUE PLAN
What is CHASSA?
 10 Month Study initiated by the City Redevelopment
Agency
 About 80 acre...
CENTRAL HEALDSBURG AVENUE PLAN
Who is Doing the Study?
 An inter-disciplinary team comprised of:
• Urban designers
• Econ...
CENTRAL HEALDSBURG AVENUE PLAN
Study Area for Transportation
Plan Area
CENTRAL HEALDSBURG AVENUE PLAN
Transportation Planning &
Traffic Engineering
 What we do
 Collaborate with team
 Plan m...
CENTRAL HEALDSBURG AVENUE PLAN
Transportation Planning Basics
 Terms
 Level of Service / Quality
of Service
Automobile
L...
CENTRAL HEALDSBURG AVENUE PLAN
Level & Quality of Service
 Level of Service
 Letter grades A – F
 Based on speed and
de...
CENTRAL HEALDSBURG AVENUE PLAN
Automobile Level of Service
LOS A LOS C
LOS D
LOS F
Images courtesy of Jim Charlier
CENTRAL HEALDSBURG AVENUE PLAN
Multi-modal Streets
CENTRAL HEALDSBURG AVENUE PLAN
Complete Streets
Reallocating Street Width to Accommodate All Users
4 lane street narrowed ...
CENTRAL HEALDSBURG AVENUE PLAN
What is Connectivity?
Connectivity refers to the
density of connections in
path or road net...
CENTRAL HEALDSBURG AVENUE PLAN
Pedestrian Connectivity
 Complete sidewalk grid
 ADA accessible
 Short blocks
 Pathways...
CENTRAL HEALDSBURG AVENUE PLAN
Pedestrian Capture Zone
 ½ mile
walk
radius to
station
CENTRAL HEALDSBURG AVENUE PLAN
Bicycle Connectivity
 Complete network of bike paths, lanes
and wide shoulders
 Connects ...
CENTRAL HEALDSBURG AVENUE PLAN
Bicycle Capture Zone
 1½ mile
bike radius
to station
CENTRAL HEALDSBURG AVENUE PLAN
Context Sensitive Solutions (CSS)
 Harmony
 Balance
 Compatibility
16
Photo: Community, ...
CENTRAL HEALDSBURG AVENUE PLAN
 All users
 Compact and mixed-use
 Varying densities
 Pedestrian-scaled:
 Blocks
 Bui...
CENTRAL HEALDSBURG AVENUE PLAN
All Streets Can Be Walkable
 Different functional
emphasis
 Serve all users
 Different a...
CENTRAL HEALDSBURG AVENUE PLAN
Bringing Place and Transportation
Design Together
19
E14th Corridor - San Leandro, CA Sourc...
CENTRAL HEALDSBURG AVENUE PLAN
E14th Corridor - San Leandro, CA Source: Community, Design + Architecture and Urban Advanta...
CENTRAL HEALDSBURG AVENUE PLAN
Overview of Major Transportation
Study Elements
 US 101 interchanges
 Healdsburg / Westsi...
CENTRAL HEALDSBURG AVENUE PLAN
Types of Issues Addressed in
Station Area Plans
 Balance modes
 Land uses
 Parking
 Con...
CENTRAL HEALDSBURG AVENUE PLAN
US 101 Interchanges
 Evaluate:
 Full interchange
 Configurations
 Travel patterns
 5-w...
CENTRAL HEALDSBURG AVENUE PLAN
Change in Travel Patterns
 Current travel
patterns
CENTRAL HEALDSBURG AVENUE PLAN
Change in Travel Patterns
 Potential travel
patterns
 Highly interactive
interchange and
...
CENTRAL HEALDSBURG AVENUE PLAN
Modern Roundabouts
 How do they work?
 When are they used?
 What are the pros
and cons?
...
CENTRAL HEALDSBURG AVENUE PLAN
How Roundabouts Work
 Entering traffic yields
 Counterclockwise
 20-25 mph
 Autos yield...
CENTRAL HEALDSBURG AVENUE PLAN
Source: NKAPC and DLZ Corporation
CENTRAL HEALDSBURG AVENUE PLAN
Two-Lane Modern Roundabout
Source: Kimley-Horn and Associates, Inc.
CENTRAL HEALDSBURG AVENUE PLAN
Source: www.pedbikeimages.org / Dan Burden
CENTRAL HEALDSBURG AVENUE PLAN
CENTRAL HEALDSBURG AVENUE PLAN
Roundabouts and Pedestrians
 Safer than conventional
intersections
 Cross one direction o...
CENTRAL HEALDSBURG AVENUE PLAN
When to Use
 Safety problems
 Capacity problems
 Closely spaced
intersections
 Unusual ...
CENTRAL HEALDSBURG AVENUE PLAN
Roundabout Pros
 Minimize stopping / delay
 Fewer and less severe crashes
 Solves skewed...
CENTRAL HEALDSBURG AVENUE PLAN
Roundabout Cons
 More right of way
 Learning curve
 Initial public uncertainty
 Bicycli...
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Transportation and Mobility

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Transportation and Mobility

  1. 1. CENTRAL HEALDSBURG AVENUE PLAN TONIGHT’S AGENDA 16 November  Introduction to CHASSA  Forum #1: ‘TRANSPORATION + MOBILITY’  Questions and Answers  Consultant Working Session with CHASSAC  Confirm Next steps/ Forum #2
  2. 2. CENTRAL HEALDSBURG AVENUE PLAN What is CHASSA?  10 Month Study initiated by the City Redevelopment Agency  About 80 acres - entry to Healdsburg
  3. 3. CENTRAL HEALDSBURG AVENUE PLAN Who is Doing the Study?  An inter-disciplinary team comprised of: • Urban designers • Economic development specialists • Transportation planners • Environmental consultants • Civil engineers • Landscape architects • Specialists in sustainability, CEQA and community outreach
  4. 4. CENTRAL HEALDSBURG AVENUE PLAN Study Area for Transportation Plan Area
  5. 5. CENTRAL HEALDSBURG AVENUE PLAN Transportation Planning & Traffic Engineering  What we do  Collaborate with team  Plan mobility and accessibility  Analyze effects of land use  Forecast travel “demand”  Assess travel patterns  Assess streets and intersections  Design multi-modal facilities  Estimate parking needs  Assess safety  Conduct impact analyses
  6. 6. CENTRAL HEALDSBURG AVENUE PLAN Transportation Planning Basics  Terms  Level of Service / Quality of Service Automobile Level of Service User Quality of Service
  7. 7. CENTRAL HEALDSBURG AVENUE PLAN Level & Quality of Service  Level of Service  Letter grades A – F  Based on speed and delays for automobiles  Quality of Service  Letter grades A – F  Based on perception of users
  8. 8. CENTRAL HEALDSBURG AVENUE PLAN Automobile Level of Service LOS A LOS C LOS D LOS F Images courtesy of Jim Charlier
  9. 9. CENTRAL HEALDSBURG AVENUE PLAN Multi-modal Streets
  10. 10. CENTRAL HEALDSBURG AVENUE PLAN Complete Streets Reallocating Street Width to Accommodate All Users 4 lane street narrowed to 2 lanes to add bike lanes
  11. 11. CENTRAL HEALDSBURG AVENUE PLAN What is Connectivity? Connectivity refers to the density of connections in path or road network and the directness of links. As connectivity increases, travel distances decrease and route options increase, allowing more direct travel between destinations.
  12. 12. CENTRAL HEALDSBURG AVENUE PLAN Pedestrian Connectivity  Complete sidewalk grid  ADA accessible  Short blocks  Pathways through parking lots to the doors of buildings
  13. 13. CENTRAL HEALDSBURG AVENUE PLAN Pedestrian Capture Zone  ½ mile walk radius to station
  14. 14. CENTRAL HEALDSBURG AVENUE PLAN Bicycle Connectivity  Complete network of bike paths, lanes and wide shoulders  Connects to regional trail system and SMART station  Signed routes and maps for wayfinding  Short-term and long-term bicycle parking at destinations
  15. 15. CENTRAL HEALDSBURG AVENUE PLAN Bicycle Capture Zone  1½ mile bike radius to station
  16. 16. CENTRAL HEALDSBURG AVENUE PLAN Context Sensitive Solutions (CSS)  Harmony  Balance  Compatibility 16 Photo: Community, Design + Architecture
  17. 17. CENTRAL HEALDSBURG AVENUE PLAN  All users  Compact and mixed-use  Varying densities  Pedestrian-scaled:  Blocks  Buildings / signs  Landscape  Streets  Streets complement uses  Streetscapes with interest and amenity Walkable Places 17 Photo: Kimley-Horn and Associates, Inc.
  18. 18. CENTRAL HEALDSBURG AVENUE PLAN All Streets Can Be Walkable  Different functional emphasis  Serve all users  Different approaches to enhance walkablility Low volume main street High volume arterial
  19. 19. CENTRAL HEALDSBURG AVENUE PLAN Bringing Place and Transportation Design Together 19 E14th Corridor - San Leandro, CA Source: Community, Design + Architecture and Urban Advantage
  20. 20. CENTRAL HEALDSBURG AVENUE PLAN E14th Corridor - San Leandro, CA Source: Community, Design + Architecture and Urban Advantage 20 Bringing Place and Transportation Design Together
  21. 21. CENTRAL HEALDSBURG AVENUE PLAN Overview of Major Transportation Study Elements  US 101 interchanges  Healdsburg / Westside / Vine / Mill 5-way intersection  Station area access and connectivity
  22. 22. CENTRAL HEALDSBURG AVENUE PLAN Types of Issues Addressed in Station Area Plans  Balance modes  Land uses  Parking  Connections  Crossings  Station access  Cost  ADA  Efficiency  Barriers  Placemaking Bus and auto circulation Bike circulation Pedestrian circulation
  23. 23. CENTRAL HEALDSBURG AVENUE PLAN US 101 Interchanges  Evaluate:  Full interchange  Configurations  Travel patterns  5-way  Closure of ramps
  24. 24. CENTRAL HEALDSBURG AVENUE PLAN Change in Travel Patterns  Current travel patterns
  25. 25. CENTRAL HEALDSBURG AVENUE PLAN Change in Travel Patterns  Potential travel patterns  Highly interactive interchange and roundabout  Traffic concentrated on Mill  Access control
  26. 26. CENTRAL HEALDSBURG AVENUE PLAN Modern Roundabouts  How do they work?  When are they used?  What are the pros and cons?  Roundabouts are NOT traffic circles! Source: Kimley-Horn and Associates, Inc.
  27. 27. CENTRAL HEALDSBURG AVENUE PLAN How Roundabouts Work  Entering traffic yields  Counterclockwise  20-25 mph  Autos yield to pedestrians and bicyclists  Bikes merge  Ride in middle of lane  Bikes may use sidewalk
  28. 28. CENTRAL HEALDSBURG AVENUE PLAN Source: NKAPC and DLZ Corporation
  29. 29. CENTRAL HEALDSBURG AVENUE PLAN Two-Lane Modern Roundabout Source: Kimley-Horn and Associates, Inc.
  30. 30. CENTRAL HEALDSBURG AVENUE PLAN Source: www.pedbikeimages.org / Dan Burden
  31. 31. CENTRAL HEALDSBURG AVENUE PLAN
  32. 32. CENTRAL HEALDSBURG AVENUE PLAN Roundabouts and Pedestrians  Safer than conventional intersections  Cross one direction of traffic  Crossing visible to motorist  Crossings separate from entry and exit  Cross behind vehicles  Refuge on splitter island  Concern for the visually impaired Source: Canes and Tails A blog for Orientation and Mobility Specialists
  33. 33. CENTRAL HEALDSBURG AVENUE PLAN When to Use  Safety problems  Capacity problems  Closely spaced intersections  Unusual geometry – multiple legs  Where sight is obscured  Gateways  Retrofit projects Source: Kimley-Horn and Associates, Inc.
  34. 34. CENTRAL HEALDSBURG AVENUE PLAN Roundabout Pros  Minimize stopping / delay  Fewer and less severe crashes  Solves skewed, unusual or multi-leg intersections  More capacity than traffic signals  Lower fuel consumption  Reduces carbon emission  Attractive gateways
  35. 35. CENTRAL HEALDSBURG AVENUE PLAN Roundabout Cons  More right of way  Learning curve  Initial public uncertainty  Bicyclists uncomfortable  Blind pedestrian concern

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