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Did You Know?

Learn more about the I-405 Sepulveda Pass Improvements Project

2013

December 13
How Are Old and New Freeway Lanes Joined?
Although it appears to be a flat gray ribbon uncurling toward the horizon, a freeway lane has tiny peaks and valleys, slopes and divots created by hundreds of thousands of automobiles and their tires or—in the case of the I-405 through the Sepulveda Pass—tens of millions of cars.

May 31
How big are the Walls?
Four types of walls along the I-405 Sepulveda Pass Improvements Project total a length of 18 miles.

2012

December 10
What Did Caltrans Crews Accomplish During Carmageddon II?
Caltrans reasoned that sprucing up the freeway while the Mulholland Dr Bridge was demolished would cause less inconvenience to drivers.

July 20
Why would someone mix boys and bulldozers?
A pack of 10-year-old Cub Scouts receive a close-up view of heavy construction.

Carpooling During Wilshire Loops
June 19
How are California's highways named?
Naming a highway after a person requires a circuitous route.

Carpooling During Wilshire Loops
June 18
Why Are the North Side Girders a Milestone?
A bridge's roadway is built on girders.

Carpooling During Wilshire Loops
March 13
Carpooling During Wilshire Loops
Metro Commute Services team can help employers and their employees cope with the Wilshire ramp closures.

Why So Many BMPs Through the Sepulveda Pass?
February 28
Why So Many BMPs Through the Sepulveda Pass?
The BMPs will treat the additional runoff created by the wider freeway and bring the storm water treatment capabilities up to current standards.

Why Do Back-Up Alarms Have To Be Noisy?
February 17
Why Will an Off-Ramp Disappear?
A Westside landmark will vanish when the I-405 Sepulveda Pass Improvements Project finishes its work.

 

2011

Why Do Back-Up Alarms Have To Be Noisy?
December 28
Why Do Back-Up Alarms Have To Be Noisy?
When they are working as intended, back-up alarms—in common with some forms of modern music—broadcast annoying sounds for several blocks. The I-405 Sepulveda Pass Improvements Project has been trying to do something about this.

Why Is No One Working Where Traffic Is Restricted?
December 7
Why Is No One Working Where Traffic Is Restricted?
Although it might seem random to the harassed driver, traffic control in a construction area—especially an area as congested as the Sepulveda Pass—is more science than art.

November 8
Why Is the Montana/Sepulveda Intersection Significant?
Sitting a stone's throw east of the I-405 freeway and the Brentwood Glen community, the Montana Av/Sepulveda Bl intersection continues its transformation by the I-405 Sepulveda Pass Improvements Project.

HMulholland Community Meeting
July 1
Mulholland Community Meeting
On Thursday, June 23, the I-405 Sepulveda Pass Improvements Project hosted a community meeting on the July 16-17 Mulholland Bridge Demolition and the resulting full closure of the I-405 in the Sepulveda Pass.

How Do You Explain Pile Driving to First-Graders?
March 15
How Do You Explain Pile Driving to First-Graders?
I-405 Sepulveda Pass Improvements Project team stood before 35 high-energy kindergarten and first-graders to demonstrate how bridges are built.

How Do You Drill Under a River of Traffic?
March 11
How Do You Drill Under a River of Traffic?
On a typical Wednesday in February 2009, over 120,000 vehicles flow east and west past Veteran Av on Wilshire Bl.

How Is a Giant Freeway Landscaped?
January 19
How Is a Giant Freeway Landscaped?
Long before she became a landscape architect, decades before she landscaped schools, ports, airports and parks, Lynn Capouya gathered discarded Christmas trees.

How to Build Walls Longer Than an Aircraft Carrier
January 07
How to Build Walls Longer Than an Aircraft Carrier
Every day they watch the I-405 highway curve away from them below while they work to hold back a hillside.

How Mulholland Dr Bridge Was Constructed
January 06
How Mulholland Dr Bridge Was Constructed
The main portion of Mulholland Dr-westward from the Cahuenga Pass in Hollywood past the Sepulveda Pass-opened in 1924 under a different name: the Mulholland Highway.

 

2010

How to Crush Bridges into Roadways
December 20
How to Crush Bridges into Roadways
Is there a way to prevent thousands of tons of concrete and asphalt from being dumped into landfills, you might ask. There is.

Moving the spaghetti of utilities under Sepulveda Bl
October 06
Moving the spaghetti of utilities under Sepulveda Bl
Bonnie Verdin loves spaghetti, although she wishes she saw less of it during her work day.

CAC Meeting
September 10 
CAC Meeting
The August 26 Community Advisory Committee (CAC) meeting focused on committee requests that have been resolved and those still pending.

Reduce Construction Material Sent to Landfills
August 4 
Reduce Construction Material Sent to Landfills
The I-405 Sepulveda Pass Improvements Project, has received approval to operate material-crushing sites within the project boundaries.

How Crews Lay K-Rail
July 20
How Crews Lay K-Rail
Mostly—it’s invisible, part of the Southern California highway landscape, much like bumper stickers and lane changes without turn signals—but if you begin to look, K-Rail seems to be everywhere.

Project examines a freeway area that never carries cars
June 16
Project examines a freeway area that never carries cars
Commuters and neighbors can see that the I-405 uses a sophisticated system of lanes, ramps and signage to move hundreds of thousands of vehicles each day.

Why clear and grub precedes other preconstruction work
June 2
Why clear and grub precedes other preconstruction work
Clear and grub” appears in multiple Construction Notices for the I-405 Sepulveda Pass Improvements Project, and although the term may sound like the name of an unsuccessful County Western duo....

Quarterly Community Meeting Described Traffic Flow Modifications
May 27
Quarterly Community Meeting Described Traffic Flow Modifications
Before an audience of approximately 50 attendees, the I-405 Sepulveda Pass Improvements Project team used its May 20 Quarterly Community Meeting to provide an update on the....

Scale of widening project apparent in quantities required to complete it
April 27
Scale of widening project apparent in quantities required to complete it
The I-405 Sepulveda Pass Improvements Project is a large project by any measure: its length, its cost, its complexity.

Artists present aesthetic designs for Sepulveda Bl walls
April 20
Artists present aesthetic designs for Sepulveda Bl walls
Before an audience of approximately a dozen attendees, as well as several Community Advisory Committee (CAC) members, the two artists responsible for the aesthetic designs for the 1720/1730 walls on Sepulveda Bl presented their initial concepts April 8.

How you keep traffic moving through a complex highway project
April 13
How you keep traffic moving through a complex highway project
Brandon Schissel, Maintenance of Traffic Lead for the I-405 Sepulveda Pass Improvements Project, calculates how to maintain traffic flow while supporting an aggressive construction schedule, a considerable challenge when working on one of the nation’s busiest highways.

How artists soften a mass of concrete
April 7
How artists soften a mass of concrete
For years, pedestrians, bicyclists and drivers have passed the retaining walls on either side of Homedale Dr, east of the I-405 Freeway, and seen a mass of flat concrete.

Brett Barnett, has highway construction in his veins
April 2
Brett Barnett, has highway construction in his veins
Brett Barnett, one of three segment managers for the I-405 Sepulveda Pass Improvements Project, has highway construction in his veins. Well, at least in his family tree.

How a freeway is cut down to size
March 30
How a freeway is cut down to size
Many steps are required before the new section of the I-405 can be attached to the current section.

Kay Greeley, Arborist for the Project is also a tree hugger
March 19
Kay Greeley, Arborist for the Project is also a tree hugger
Kay Greeley, a certified arborist, as well as a civil engineer and landscape architect, led the tree survey process that mapped the 5,600 trees and “significant foliage” along the I-405 Sepulveda Pass Improvements Project.

Variety of signage is used for traffic control and safety
March 19
Variety of signage is used for traffic control and safety
The construction team widening the I-405 has been using a variety of signage devices to control traffic and increase worker safety. Here are three frequently used tools.

Caltrans construction manager has big responsibilities
March 17
Caltrans construction manager has big responsibilities
Allan Tanjuaquio’s title on the $1.03 billion I-405 Sepulveda Basin Improvements Project, Construction Manager, means he is responsible for all construction and a large portion of quality assurance.

CAC meeting discussed landscaping and the Sunset Bl bridge demolition
March 4
CAC meeting discussed landscaping and the Sunset Bl bridge demolition
The fourth Community Advisory Committee (CAC) meeting, held February 25 at the project office, focused on the I-405 Sepulveda Pass Improvements Project’s landscaping plan.

High technology used for pre-construction activities
March 1
High technology used for pre-construction activities
Recent photographs describe some of the pre-construction activities required as part of the I-405 Sepulveda Pass Improvements Project.


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