REVIEW OPTIONS AND CONSIDER IMPROVEMENTS TO
ROUNDABOUT AT BROOKHURST BLVD AND GOLDEN
SPIKE TRAIL
CITY COUNCIL REGULAR MEETING
ITEM: 5.3| AUGUST 8, 2022
1 BACKGROUND:
2 During the July 2022 City Council
meeting, Council requested staff to:
Reevaluate the Brookhurst Blvd and
Golden Spike Trail Roundabout design
Present alternative solutions to the
previously approved design
EXISTING DESIGN:
3 Designed in 2005 prior to code standards
and guidance for roundabout geometry
Curbs form a circle and the crosswalks are
within the roundabout
Minimal channelization for vehicles and
multiple decisions made at a single point
when entering the roundabout
MODERN ROUNDABOUT DESIGN:
4 The Federal Highway Administration, Caltrans Highway Design Manual and Manual on Uniform Traffic Control
Devices published standards for design of roundabouts
Benefits of modern roundabout design:
Increase pedestrian safety
Promote lower speeds and traffic calming
Reduce conflict points and limit number of decisions
at a single point
Improved operational performance and capacity
COMPARISON OF EXISTING AND MODERN DESIGN:
5 OPTION 1 – REDUCE CENTRAL ISLAND:
6 Achieves modern roundabout design while
maintaining existing street parking
Increases pedestrian safety
Maintains existing intersection capacity
$400,000 + CIP PS 22-41 original cost
OPTION 2 – PROCEED WITH ORIGINAL DESIGN:
7 Achieves modern roundabout
design
Increases pedestrian safety
Maintains existing intersection
capacity
Eliminates some existing street
parking
CIP PS 22-41 original cost
OPTION 3 – INSTALL DELINEATORS:
8 Striping has been installed as an
interim and immediate improvement
Adding delineators would provide
physical channelization of vehicles
OPTION 4 – CONVERT TO ALL-WAY STOP:
9 Increases pedestrian safety
Removal of central island
Reconstruction of all corners
Reduces intersection capacity and
increases traffic delays
Impacts underground utilities and street
drainage
Approximate cost is $1,500,000
RECOMMENDATION:
Staff recommends that Council considers Option 1 as it provides a modern roundabout design that would reduce vehicle speeds, increase pedestrian safety, maintain intersection capacity and not impact or eliminate existing street parking. 10