What is a Roundabout

1
What is a Roundabout?
2
Conflict Point Comparison
3
How Roundabouts Work

• Non-Conforming Traffic Circles
• Yield at Entry
• Traffic Deflection
• Angles of Entry

4
Roundabout Challenges

• Major Challenges
• Bicycles
• Visually Impaired
• ADT Max.
• Upstream/Downstream Traffic
• One Vs. Several in Line

5
Characteristics of Roundabouts

• Safety
• Capacity
• Aesthetics
• No Traffic Signal

6
Benefits of a Roundabout

• Lives Saved
• 90 Fatalities
• 76 Injury Crashes
• 40 Pedestrian Crashes
• 75 Conflict Points

7
Benefits of a Roundabout (Contd)

• Slower Vehicle Speeds
• Efficient Traffic Flow
• Reduction in Pollution Fuel Use
• Saved

8
Benefits of a Roundabout (Contd)

• Community Benefits
• Aesthetic Landscaping
• Walkability/Village Atmosphere
• Traffic Calming/Safety
• Catalyst for Smart Growth

9
Why Roundabounds?

• Insurmountable Traffic Problems
• Too Much Traffic
• Public oppositions to New and/or Wider Roads
• Line Source Pollution and CO2
• Fixed Resources
• Public Expectations New Approaches
• Safety

10
Why Roundabounds? (Contd)

• Other Countries Solution
• USA
• Southern California

11
History of Roundabouts in the City of San Diego

• 1998 Linda Vista Rd/Morena Blvd
• 2002 Bird Rock

12
Where is Bird Rock / La Jolla Blvd ?

• La Jolla PB route
• Bisects Community
• 22,000 ADT

13
This place needs help !
La Jolla Blvd looking North
14
History

• 2001 BRCC issues Pink Report
• 2001 Scott Peters 3 day event ?
  Traffic Task Force
• 2002 Walkable Communities ? Charrette
• ? Traffic Plan

15
History (contd)

• 2003 Community approves
• Traffic Plan
• 2004 City Council unanimously approves
  Traffic Plan
• 2005 Community petitions for MAD

16
Challenges
La Jolla Blvd

• Speeding
• Pedestrian safety
• Cut-through traffic
• Parking shortage

17
Concerns

• La Jolla Blvd.
• High Speed/Traffic Volumes
• 68 ft. Width
• Safety/one fatality

18
Other Concerns

• Area
• Cut-Through Traffic
• School Congestion
• Aesthetics
• Financial Stagnation

19
Community-Driven Process
20
Solution

• Traffic Management Plan
• Community Coordination
• Traffic Innovations
• 10 Roundabouts/Circles
• 25 other Major Improvements

21
Link between street aesthetics and community
identity evident early on
Ca 1923
22
but the City made it clear
with Community Participation
without
23
MAD Petition
24
Bird Rock Traffic Management Plan
25
La Jolla Boulevard
26
(No Transcript)
27
La Jolla Hermosa Blvd.




24
7'
6
6
7


50




28
Smart Growth Development Catalyst

• New 139 Unit Condo
• Mixed Use Com./Resid. (Midway)
• New Longs Drugs
• Mixed Use Com./Resid. (Bird Rk. Av.)

29
(No Transcript)
30
(No Transcript)
31
(No Transcript)
32
(No Transcript)
33
(No Transcript)
34
(No Transcript)
35
(No Transcript)
36
(No Transcript)
37
(No Transcript)
38
(No Transcript)
39
(No Transcript)
40
(No Transcript)
41
(No Transcript)
42
(No Transcript)
43
(No Transcript)
44
(No Transcript)
45
(No Transcript)
46
(No Transcript)
47
(No Transcript)
48
(No Transcript)