Bird Rock CA corridor with roundabouts
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Detail of the Traffic Flow Improvement project in Bird Rock, CA, suburban San Deigo
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Bird Rock CA corridor with roundabouts
- 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. Aerial View Looking North
- 9. Defining Project Scope at C helsea/Sea Ridge 1200 ADT (total intersection volume) 85 th percentile speed – 30 mph Before Before
- 10. C helsea/Sea Ridge - After
- 11. No ROW Impact Significant ROW Impact Horizontal Geometry Adjustments During Design Minimize ROW Impact
- 12. Horizontal Geometry Adjustments During Design La Jolla Hermosa/Forward St. Final Design
- 13. La Jolla Hermosa/Forward St. Final Design
- 14. La Jolla Hermosa/Forward St. - Before
- 15. La Jolla Hermosa/Forward St. - After
- 16. La Jolla Hermosa/Forward St. - After (nearly complete)
- 17. Landscape Concept Maintenance Assessment District
- 18. Landscape Concept Community Effort
- 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. La Jolla Boulevard/Forward St.
- 21. La Jolla Boulevard/Forward St.
- 23. SU-30 Truck Turning Template Example on LJB/CDLC
- 24. Truck Turning Template Example on LJB/Forward St
- 26. Fire Truck Left Turn Movement 75 % Design
- 27. La Jolla Blvd. and Forward St. – Intersection Angle
- 29. Bus Stop on La Jolla Blvd @ Camino De La Costa N
- 30. Forward Bus Stop
- 31. City Bus Through Movement Simulation Bird Rock
- 32. Bus Stop NW corner La Jolla Blvd. and Bird Rock Ave. Before After
- 33. La Jolla Blvd Roundabout – Truck Through Movement
- 34. La Jolla Blvd/Midway St. - Long Flatbed Trailer Video
- 36. Right of Way Impacts – La Jolla Blvd. and Forward St. Forward St.
- 37. Roundabout at La Jolla Blvd/Forward St Before After Before
- 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. 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. Low-bed Trailers & Truck Apron
- 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. 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
- 44. In-Pavement Flashers at Midway and Colima
- 45. In-Pavement Flashers – New Design
- 47. Driveway Relocation Existing driveway to be relocated N
- 52. Drainage Problem – La Jolla Blvd. to Alley
- 53. Drainage Solution from La Jolla Blvd. to Alley
- 54. Drainage Solution along La Jolla Blvd. crossing Forward Ave.
- 55. Concept
- 56. Camino de La Costa/ La Jolla Blvd Before After
- 57. Bird Rock/ La Jolla Blvd Before After
- 58. Forward/ La Jolla Blvd Before After
- 59. Midway/ La Jolla Blvd Before After
- 60. Colima/ La Jolla Blvd Before After
- 62. New Guide Sign?? NOT supported by MUTCD or Local Agency
- 63. Thank You! (619) 533-4661 [email_address] Photo: Mike Arnold
Notas do Editor
- Dozens of news stories, Previous W&S projects,
- More Drainage
- Drainage, Drainage, Drainage. Offset left to roundabout entry for high speed entry
- On La Jolla Boulevard, pedestrians used to have 68 feet of pavement to across. With implementation of roundabouts, all pedestrians would cross only one lane or 14 feet of pavement at a time (one lane in each direction with 10 feet of median that serves as pedestrian refuge area). This would substantially reduce pedestrian exposure to traffic.
- Right of Way restriction, certain movements of a WB-50 design vehicle cannot be accomodated. As the minimum design standard, the roundabouts can accommodate all turning movements of a SU-30 design vehicle, Single Unit Truck.
- At 30% design the SU-30 could barely clear the acute angled left turns. Redesign on entry and exit width were necessary.
- The followings are turning simulations of a semi-trailer truck, WB-50, with current design of roundabouts, and with the modified design of with a narrower circulatory roadway width. As the graphs show, a WB50 truck can barely clear obtuse angled left turns with current designs, and the truck will not be able to clear the obtuse angled left turns with the narrower entry width design.
- Highway Design Manual Page 400-2
- Modify curb and gutter radius (increase) so trailing wheels avoid curb
- Passenger comfort, Driver may avoid using truck apron, nearly 3 feet of overhang
- Condensation inside pavement flashers, Damaged pavement flashers, Damaged concrete