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Bird Rock CA corridor with roundabouts

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Detail of the Traffic Flow Improvement project in Bird Rock, CA, suburban San Deigo

Published in: Automotive
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Bird Rock CA corridor with roundabouts

  1. 1. Roundabout Product Demonstration Showcase Bird Rock Traffic Flow Improvement Project December 10, 2008 City of San Diego Engineering & Capital Projects Department Mike Arnold, Design Project Manager Gary Chui, T.E. Project Design Consultants Domenic Lupo, P.E.
  2. 2. Aerial View Looking North
  3. 3. Seahaus Roundabout
  4. 4. Project History <ul><li>Planning Process Began in January 2000 </li></ul><ul><li>4 Year Collaboration: </li></ul><ul><li>City Staff Community Merchants Residents Consultants </li></ul><ul><li>Commitment by council office </li></ul><ul><li>Walkable Communities Charrette Walking Tours </li></ul><ul><li>Creation of Focus Groups Bird Rock Traffic Task Force </li></ul><ul><li>Bird Rock Beautification Committee </li></ul><ul><li>Design Process – Began in 2004 </li></ul><ul><li>Construction Process – Began in 2007 </li></ul>0.125 in 3 per 3 min 340 ft 3 per 8 years
  5. 5. Project Phases <ul><li>Barrett/Seahaus Roundabouts: </li></ul><ul><ul><li>Two roundabouts and landscaped center median </li></ul></ul><ul><ul><li>Two intersections: Colima and Midway </li></ul></ul><ul><li>Bird Rock CIP Phase One </li></ul><ul><ul><li>Wrelton Street closure </li></ul></ul><ul><ul><li>Traffic circle at Sea Ridge and Chelsea </li></ul></ul><ul><ul><li>Traffic circle at Chelsea Ave. and Bird Rock </li></ul></ul><ul><ul><li>Pop-outs at Camino de la Costa and Chelsea St. </li></ul></ul><ul><ul><li>Raised medians and pop outs at Camino de la Costa and Beaumont </li></ul></ul><ul><ul><li>Traffic circle at Bellevue Ave. and Bird Rock Ave. </li></ul></ul><ul><ul><li>Raised landscaped median on Forward St. between Bellevue Ave. and Taft Ave. </li></ul></ul><ul><ul><li>Mini-roundabout at La Jolla Hermosa and Colima </li></ul></ul><ul><ul><li>Pop-outs on La Jolla Mesa Dr. and Linda Rosa Ave. and Colima St. </li></ul></ul><ul><ul><li>Speed Table on Dolphin Ave. </li></ul></ul><ul><li>Bird Rock CIP Phase Two </li></ul><ul><ul><li>Three roundabouts on La Jolla Blvd at the intersections of Camino de la Costa, Bird Rock Ave., and Forward St. </li></ul></ul><ul><ul><li>Landscaped center medians from Camino de la Costa to Midway </li></ul></ul><ul><ul><li>Mini roundabout at the La Jolla Hermosa Ave/Forward </li></ul></ul><ul><ul><li>Landscaped median on La Jolla Mesa Drive </li></ul></ul>
  6. 6. DESIGN PROCESS <ul><li>Geometrical Design </li></ul><ul><ul><li>Horizontal layout for chosen intersections </li></ul></ul><ul><ul><li>Design constraints included existing buildings & r/w </li></ul></ul><ul><ul><li>Other design considerations included proposed lane widths, proposed median, proposed parking </li></ul></ul><ul><ul><li>Input from Community </li></ul></ul><ul><li>Construction Documents </li></ul><ul><ul><li>Tie proposed horizontal to existing roads </li></ul></ul><ul><ul><li>Add vertical design to horizontal layout </li></ul></ul><ul><ul><li>Coordinate pedestrian access </li></ul></ul><ul><ul><li>Coordinate sewer design </li></ul></ul><ul><ul><li>Design to acceptable City standards/FHWA Guidelines </li></ul></ul>
  7. 7. CHALLENGES <ul><li>Unique Design Solution </li></ul><ul><li>Accommodating Existing Drainage </li></ul><ul><li>Roundabouts are relatively new to San Diego </li></ul><ul><li>Fitting a ‘round peg in a square hole’ </li></ul><ul><li>Grading design (LJ Blvd flat, side streets steep) </li></ul><ul><li>Construction – keep pedestrian and parking access open </li></ul>
  8. 8. CHALLENGES <ul><li>Defining Project Scope: </li></ul><ul><ul><li>Pop-outs verses Traffic circle </li></ul></ul><ul><ul><li>Roundabouts verses Traffic circles </li></ul></ul><ul><ul><li>Additive Alternatives </li></ul></ul><ul><ul><li>Funding to match scope of work </li></ul></ul><ul><li>Right-of-Way/ Permits to Work on Private Property </li></ul><ul><li>Maintenance Assessment District formation </li></ul><ul><li>Horizontal Alignment </li></ul><ul><li>Design Vehicle - Turning template </li></ul><ul><li>Grant Funding Allocation and Authorization, HRER, Visual Impact Study </li></ul><ul><li>Impacts to Existing Improvements - Minimize </li></ul><ul><li> LESSONS LEARNED </li></ul><ul><li>Low-Bed Trailer </li></ul><ul><li>In-pavement Flashers </li></ul><ul><li>Landscaping – Low Maintenance and Site Visibility </li></ul><ul><li>Entry and Exit Width </li></ul><ul><li>Truck Apron Material </li></ul><ul><li>Survey Data </li></ul><ul><li>Intersection Angle </li></ul>
  9. 9. Defining Project Scope at C helsea/Sea Ridge 1200 ADT (total intersection volume) 85 th percentile speed – 30 mph Before Before
  10. 10. C helsea/Sea Ridge - After
  11. 11. No ROW Impact Significant ROW Impact Horizontal Geometry Adjustments During Design Minimize ROW Impact
  12. 12. Horizontal Geometry Adjustments During Design La Jolla Hermosa/Forward St. Final Design
  13. 13. La Jolla Hermosa/Forward St. Final Design
  14. 14. La Jolla Hermosa/Forward St. - Before
  15. 15. La Jolla Hermosa/Forward St. - After
  16. 16. La Jolla Hermosa/Forward St. - After (nearly complete)
  17. 17. Landscape Concept Maintenance Assessment District
  18. 18. Landscape Concept Community Effort
  19. 19. TYPICAL INTERSECTION Camino de La Costa/La Jolla Blvd, Bird Rock/La Jolla Blvd, & Forward/La Jolla Blvd Additional Opportunity for Landscaping Additional Landscaping
  20. 20. La Jolla Boulevard/Forward St.
  21. 21. La Jolla Boulevard/Forward St.
  22. 22. <ul><li>Turning template </li></ul><ul><ul><li>Typical turning template using Auto-Turn </li></ul></ul><ul><ul><li>Buses </li></ul></ul><ul><ul><li>Fire Trucks </li></ul></ul><ul><ul><li>WB-50 </li></ul></ul><ul><ul><li>SU-30 </li></ul></ul><ul><ul><li>Through Movements </li></ul></ul><ul><ul><li>Left Turns </li></ul></ul><ul><ul><li>Right Turns </li></ul></ul>
  23. 23. SU-30 Truck Turning Template Example on LJB/CDLC
  24. 24. Truck Turning Template Example on LJB/Forward St
  25. 25. Fire Truck Specifications
  26. 26. Fire Truck Left Turn Movement 75 % Design
  27. 27. La Jolla Blvd. and Forward St. – Intersection Angle
  28. 28. <ul><li>Bus Stop Design </li></ul><ul><ul><li>MTS Coordination </li></ul></ul><ul><ul><li>Near side vs. Far side </li></ul></ul><ul><ul><li>Dimensions 30-50-30 </li></ul></ul>N
  29. 29. Bus Stop on La Jolla Blvd @ Camino De La Costa N
  30. 30. Forward Bus Stop
  31. 31. City Bus Through Movement Simulation Bird Rock
  32. 32. Bus Stop NW corner La Jolla Blvd. and Bird Rock Ave. Before After
  33. 33. La Jolla Blvd Roundabout – Truck Through Movement
  34. 34. La Jolla Blvd/Midway St. - Long Flatbed Trailer Video
  35. 35. Right of Way Impacts – La Jolla Blvd. and Forward St. <ul><li>Southwest Corner – ROW Impact and Tree removal required (The tree has been blown down by wind in February, 2005) </li></ul><ul><li>Northeast corner - ROW Impact and impact to planter box attached to the building </li></ul>N
  36. 36. Right of Way Impacts – La Jolla Blvd. and Forward St. Forward St.
  37. 37. Roundabout at La Jolla Blvd/Forward St Before After Before
  38. 38. Proposed Design vs. Existing Improvements Bird Rock Ave. and La Jolla Blvd. Might need temporary easement for construction. Right of Way Back of New sidewalk
  39. 39. Bird Rock Ave. and La Jolla Blvd. SW corner Back of proposed sidewalk Southwest Corner of La Jolla Blvd/Bird Rock N ROW Impact: 10sqft
  40. 40. Low-bed Trailers & Truck Apron
  41. 41. Trailer Model TA35 34.2ft from the truck’s rearmost to the trailer’s foremost axle Overall length of a tractor semi-trailer combination: 65ft La Jolla Blvd/Midway N
  42. 42. Trailer Model TA35 34.2ft from the truck’s rearmost to the trailer’s foremost axle Overall length of a tractor semi-trailer combination: 65ft La Jolla Blvd/Colima N
  43. 43. <ul><li>Example of new in-pavement flashers layout </li></ul><ul><li>Reduce pedestrian crossing time and exposure to vehicles </li></ul><ul><li>Street Width - 68 feet to two 14-foot segments </li></ul><ul><li>From 17 - 27 seconds to 3.5 – 5.6 seconds </li></ul>In Pavement flashers Traffic Flow Traffic Flow In-Pavement Flashers
  44. 44. In-Pavement Flashers at Midway and Colima
  45. 45. In-Pavement Flashers – New Design
  46. 46. Other Design Details <ul><li>Driveway Relocations </li></ul><ul><li>Utility Relocation </li></ul><ul><li>Median Maintenance Walkway </li></ul><ul><li>Sewer Alignment – Offset to Centerline </li></ul><ul><li>Impacts to Existing Improvements </li></ul>
  47. 47. Driveway Relocation Existing driveway to be relocated N
  48. 48. Driveway Relocation
  49. 49. Utility Pole Relocation
  50. 50. Landscape Maintenance Walkway
  51. 51. Traffic Control Phasing
  52. 52. Drainage Problem – La Jolla Blvd. to Alley
  53. 53. Drainage Solution from La Jolla Blvd. to Alley
  54. 54. Drainage Solution along La Jolla Blvd. crossing Forward Ave.
  55. 55. Concept
  56. 56. Camino de La Costa/ La Jolla Blvd Before After
  57. 57. Bird Rock/ La Jolla Blvd Before After
  58. 58. Forward/ La Jolla Blvd Before After
  59. 59. Midway/ La Jolla Blvd Before After
  60. 60. Colima/ La Jolla Blvd Before After
  61. 62. New Guide Sign?? NOT supported by MUTCD or Local Agency
  62. 63. Thank You! (619) 533-4661 [email_address] Photo: Mike Arnold

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