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I-405 Sepulveda Pass Improvements Project Community Meeting August 15, 2013 1
I-405 Sepulveda Pass Improvements ProjectCommunity Meeting August 15, 2013
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Mulholland Segment
• Sound wall construction along southbound Valley Vista ramps is complete
• Traffic switch in September will create space for construction along the freeway.
• Final configuration of Valley Vista on-ramp will have three lanes
• Southbound Valley Vista on-ramp traffic was switched in June
Sherman Oaks and Valley Vista Work
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TaskComplete
(%)
Sepulveda Undercrossing (near Valley Vista)
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Valley Vista SB On-Ramp 80
Sherman Oaks and Valley Vista Work
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• Wednesday, August 21 and Thursday, August 22
• Sepulveda Bl will be fully closed between the northbound I-405 on-ramp from Getty Center Dr to the southbound off-ramp to and on-ramp from Getty Center Dr.
• Nighttime closures between 10PM to 5AM.
Deck pour for Bridge 19 occurs later this week
• Upcoming construction of bridge deck, sound/retaining walls, and final drainage work; girders are installed
• Sepulveda Bl overpass/bridge widening ongoing until Fall 2013
Sepulveda Bl Overpass/ Bridge Widening
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Nighttime lane reductions from 10pm-6am on Sepulveda Bl near bridge
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Sound Wall Construction—Sherman Oaks
Valley Vista Area Construction
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Valley Vista Area Construction (Contd.)
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More than just girders now, crews are working on building diaphragms. Sepulveda Bl can be seen to the right.
Valley Vista Area Construction (Contd.)
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Retaining wall under construction along west side of southbound on-ramp from Valley Vista
Work on wing wall of Wall 23.
Mulholland Bridge (North Half ) Reconstruction
• Majority of bridge deck concrete pours are complete
• Anticipated occasional full closures of the Mulholland Bridge
• Anticipated completion of construction in late 2013
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Removing false work on the Mulholland bridge requires full directional freeway closures from Valley Vista to Skirball, 11pm-9am.
Saturday, August 17: Southbound directional freeway closure
Saturday, August 24: Northbound directional freeway closure
• Girders have been installed• NB freeway widening and NB ramps realignment ongoing• Anticipated completion of construction in late 2013
Skirball Bridge (South Half ) Reconstruction
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• Intermittent full Sepulveda Bl closures have begun and will last for 10 months
• Sepulveda Bl widening will allow addition of northbound auxiliary lane to Skirball Center Dr
• Widening of Sepulveda Bl (south of Skirball Bridge) will require frequent reduction of Sepulveda Bl from Mountaingate Dr to Skirball Center Dr.
• At times reductions will limit Sepulveda Bl to one northbound lane open from 10pm to 6am (southbound lanes will be closed). These intermittent closes are anticipated to last 10 months.
Sepulveda Bl Widening—Wall 1921
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Sepulveda Bl Widening—Wall 1921
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Excavation, grading 50 percent complete
Southbound Skirball Ramps—Traffic Lanes
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Completion of Skirball Southbound Ramps
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Southbound I-405 off-ramp at Skirball Center Dr opening late 2013
Segment 3 Accomplishments—Last Quarter
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Task Status
Complete Bridge 19 (Sepulveda Bloverpass north of Getty Center Dr)
Setting girders complete 6.17.13
Complete Bridge 21 (Skirball) Setting girders complete 6.21.13
Complete Bridge 22 (Mulholland) Top deck pour complete 7.1.13; false work removal 50 percent complete; false work anticipated to be complete end of August
Complete Bridge 23 Setting girders complete 6.21.13
Segment 3 Accomplishments—Last Quarter
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Task Status
Valley Vista on-ramp Traffic switched 6.24.13
NB Getty Center Dr on-ramp Reopened 7.31.13
New sound wall at Valley Vista Completed 8.2.13
New 1985 sound wall (north of Mulholland Dr, along southbound lanes)
Seventy-five percent complete
Mass excavation along Sepulveda Bl Fifty percent complete
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Wilshire Segment
Northbound I-405 On-Rampfrom Eastbound Wilshire Bl
90-Day ClosureAugust 22
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Wilshire Ramps Rendering
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Northbound Lane Opens
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On June 9, a 2.7-mile segment of new lane opened from I-10 to Wilshire Bl.
Wilshire Segment—Extended Closures
Ramp Tentative DateMaximum Duration
(Days)
WB Wilshire on-ramp to NB I-405 Complete 90
NB I-405 off-ramp to WB Wilshire Complete 90
SB I-405 off-ramp to WB Wilshire Complete 14
WB Wilshire on-ramp to SB I-405 NOT NEEDED 14
NB I-405 off-ramp to EB Wilshire NOT NEEDED 21
EB Wilshire on-ramp to NB I-405 August 22 90
SB I-405 off-ramp to EB Wilshire NOT NEEDED 90
NB I-405 on-ramp at Olympic (Cotner) NOT NEEDED 21
SB I-405 off-ramp to Santa Monica NOT NEEDED 14
NB I-405 on-ramp from Santa Monica NOT NEEDED 7
SB on-ramp from Santa Monica NOT NEEDED 7
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Wilshire Segment—90-Day Closure
The 90 day closure of the eastbound Wilshire Bl on-ramp to northbound I-405 is scheduled for August 22.
Existing ramp: 824 feetCompleted ramp: 3,129 feet280% increase in capacity
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Wilshire Segment—90-Day Closure
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During the 90-day closure, the existing northbound on-ramp from eastbound Wilshire (in the center of the photo) will be demolished.
90-Day Closure-Existing Conditions
• Northbound I-405 off-ramp to eastbound Wilshire complete
• Olympic Bl on-ramp to northbound I-405 complete
• Santa Monica Bl on-ramp to northbound I-405 complete
• Northbound I-405 additional lane complete from I-10 to Wilshire Bl
• Demolition of the existing I-405 off-ramp to eastbound Wilshire complete
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90-Day Closure Work Overview
August 2013• Demolition of existing bridge
and abutments• Drive piles (Total of 10)• Erect false work
September 2013• Erect overhang, install rebar• Pour deck, cure time for false
work
October 2013• Strip False work• Sandblast, install conduit
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The lower half of Bridge 8 curves to meet its northern half.
90 Day Closure Map
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90-Day Closure—Detour Routes
Detour Route: Southbound Sepulveda Bl to westbound Santa Monica Bl to northbound I-405
Alternate Route: Southbound Sepulveda Bl to westbound Pico Bl to northbound Cotner Av to northbound I-405
Nighttime Route: Federal Av to Santa Monica Bl to NB on-ramp. Westwood Bl to Santa Monica Bl to NB on-ramp
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Northern half of Bridge 8 curves to meet the I-405
90-Day Closure—Temporary Measures
• Dedicated eastbound Wilshire right-turn lane to southbound Sepulveda Bl
• Extension of the right-turn pocket on southbound Sepulveda Bl to Santa Monica Bl
• Westbound Santa Monica 3 lane modified from dedicated through lane to shared through/right-turn lane. This will require the removal of the north side of crosswalk. Detour will be to the south side of crosswalk.
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• Optimized signal timing
• 24 Traffic Control Officers (TCO)s + 6 TCO Strike Teams for both closures
• Ramp meter modifications• Increase metering rate for northbound Olympic Bl on-ramp• Turn off the ramp meter for northbound Santa Monica Bl on-
ramp, Monday through Sunday from 2:30pm to 6:30pm
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90-Day Closure—Temporary Measures
• For Santa Monica Bl traffic relief, a sign providing an alternate route for Santa Monica Bl motorists will be posted.
• The contingency route will be northbound Westwood Bl to westbound Wilshire Bl to the northbound I-405 on-ramp.
90-Day Closure—Contingency Plan
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Wilshire Segment—Bridge Status
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Bridge Location Status (%)
1 I-10/Exposition Bl 95
2 Expo/Pico 80
3 Olympic Bl 95
4 Santa Monica Bl 95
5 Ohio Av 95
6 SB to EB Wilshire Off 95
7 NB to EB Wilshire Off 95
8 EB Wilshire to NB On 65
9 Wilshire Bl Undercrossing 95
10 NB to WB Wilshire Off 100
11 WB Wilshire to NB On 100
12 Constitution Av 95
Bridges 13 to 18 are in Segment 2Bridges 19 to 23 are in Segment 3
Wilshire Segment—Wall Update
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Significant progress in retaining wall and sound wall work• Approximate total linear feet of retaining walls 17,375 ft.
• About 99% of this is complete
• Approximate total linear feet of sound walls 8,650 ft.• About 98% of this is complete
• Continuation of top deck construction until the end of August
• Most of the work will take place during the day except for rebar installation and top deck pour. o Rebar installation: Sunday night, 8/11 to Friday night, 8/23.o Deck will be poured at night in the first week of September.
9pm to 5am:Pico Bl (Sawtelle to Cotner) and EB 10 connector to NB 405 closure needed during nightly work as noted above.
Wilshire Segment—Pico Bl
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Demolition and reconstruction of curb, gutter, and sidewalk • EB Santa Monica Bl, Beloit to Cotner: Completed 8/9 - 8/12
• WB Santa Monica Bl, Cotner to Beloit: Will be 8/16-8/19:
o Day- 6am to 9pm: WB Santa Monica lane #3 closedo Night- 9pm to 6am: WB Santa Monica lanes 2, 3 closed,
NB on-ramp closed
Wilshire Segment—Santa Monica Bl
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Demolition of asphalt, excavate/base roadway and pave new asphalt
• 2 lane on SB Sepulveda from Wilshire to 500 ft north of Wilshire
• 4 lane on WB Wilshire from 200 ft east to 200f ft west of Sepulveda Bl
• Continuous, starting Friday, August, 16h at 9pm to Sunday, August 18 at 5am
Westbound Wilshire NB on-ramp will not be impeded
Wilshire Segment—Wilshire Bl
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Sunset Segment
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NB I-405 Sunset Off-Ramp120-Day Closure
Underway
Prior Ramp Configuration• One northbound left-turn lane to
westbound Sunset• One northbound right-turn lane to
eastbound Sunset
Final Ramp Configuration• One northbound left-turn lane to
westbound Sunset• Two northbound right-turn lanes to
eastbound Sunset• Increased length and capacity by 60
percent
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120-Day Closure—Reconstruction
Sunset Segment—120-Day Closure
Completed Northbound I-405 Sunset Bl Off-Ramp
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Sunset Segment—120-Day Closure
Where the northbound off-ramp recently stood, workers excavate the remaining support structures on August 5 41
Sunset Segment—120-Day Closure
Northbound I-405 Sunset Bl Off-Ramp Work Area
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Abutment 1
Span 1Span 2
Span 3
Abutment 4
2 cranes
Wall 1738A
Bent 3Bent 2
120-Day Closure—Detour Routes
Westbound Sunset Detour• NB I-405 off-ramp to westbound Wilshire Bl, to northbound Sepulveda Bl,
to eastbound Sepulveda Way, to westbound Sunset Bl• Alternate: Moraga Dr off-ramp, to southbound Sepulveda, right on
Church Ln to Sunset Bl (14’-2” height restriction at Church Bridge)
• NB I-405 off-ramp to westbound Wilshire Bl, right on northbound San Vicente Bl, right onto north Barrington Av, left onto westbound Sunset Bl
Eastbound Sunset Detour• NB I-405 off-ramp to eastbound Wilshire Bl, to northbound Veteran Av to
eastbound Sunset Bl
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120-Day Closure—Temporary Measures
• Since Monday 8/5, 24 traffic control officers (TCOs) were deployed to key locations during AM and PM peak hours throughout both closures plus six-TCO strike team to patrol and monitor entire area
• AM Peak Hours: 6:45am to 9:45am
• PM Peak Hours: 4 to 7pm
• Locations vary based on daily observations
• TCOs at key locations, such as Church & Sepulveda, Church & Sunset, Wilshire & Sepulveda will remain. Locations flexible based on observations
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Implemented Throughout Entire Closure• Portable changeable message signs in use.
• Signal re-timing/coordination improvements.
• Adding a “closed” sign to the freeway overhead signs next to “Sunset” to encourage more drivers to use Wilshire.
• There are “Local Access Only” signs on several neighborhood streets to reduce cut thru traffic.
• Nighttime signage on a changeable message board that faces EB Moraga traffic exiting the NB Moraga off-ramp.
• Southbound Sepulveda traffic also sees a “Local Access Only” sign on the south side of the Bellagio/Moraga intersection facing EB traffic.
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120-Day Closure—Ongoing Mitigations
Northbound Moraga Dr Off-ramp (alternate route)-Implemented on Aug. 9th• Lane 2 will be a dedicated right turn lane (currently shared with through)• Lane 1 will be a shared left and through lane (currently exclusive left turn)
Traffic patterns are being monitored for two weeks to allow adjustment prior to contingency plan recommendations.
Available Contingency Measure:Northbound Veteran Av and Eastbound Sunset Intersection• Right turn pocket onto eastbound Sunset will be extended 500 ft to
accommodate added volume
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120-Day Closure—Contingency Measures
Sunset Segment—120-Day Closure
Sunset Off-ramp ReconstructionAugust 2013• Demolish existing bridge, abutments, retaining wall- complete• Erect bent false work- in progress• Excavate for new abutments- complete• Initiate construction of footings at abutments- in progress• Backfill MSE Wall 1738A & Paving- in progress• Pile driving for abutment foundation- complete (ahead of schedule)
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Sunset Segment—120-Day Closure
Next Month’s Activities
September 2013• Continue construction of footings at
abutments; cure wall• Complete MSE Wall 1738A construction• Set girders• Install drainage and backfill at abutment• Initiate deck construction
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The new northbound off-ramp points toward Sunset Bl
Sunset Segment—120-Day Closure
October 2013• Continue construction of top deck & diaphragms• Initiate construction of approach slabs• Initiate cure of top deck, bents and diaphragm
November 2013• Finalize construction of approach slabs• Finalize cure of top deck, bents and diaphragm• Construct concrete barrier• Post tensioning & grouting• Remove false work• Stripe and tie-in at Sunset Bl
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Public Outreach Strategy
• E-blasts
• Posted detour and alternative route maps
• Online and print advertising
• Go511 radio ads
• Changeable message signs
• Updates on Hotline, website, social media
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Public Outreach Strategy
• Media and social media networking
• Briefing sessions to key stakeholder groups
• Metro Commute Services outreach
• Community meetings
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Media Outreach Campaign—Key Messages
• Plan ahead to determine alternate routes• Make extra time to reach destinations• Eliminate unnecessary trips to avoid peak congestion
impacts• Work with employers to adjust work hours or telecommute
to avoid peak hour congestion• Work with Metro to find rideshare partners• Take public transit when possible
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• There are approximately 18,775 linear ft of retaining walls in the Sunset Segment
• 15,639 linear ft of retaining wall have been built
• This means that approximately 83% of all retaining wall for the Sunset segment has been built.
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Sunset Segment—Retaining Wall Status
Approximately 83 percent of retaining walls in Sunset Segment have been built
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Sunset Segment—Bridge Status
Bridge LocationStatus
(%)13 Montana Undercrossing 95
14 NB Sunset Off-ramp 50
15 NB Sunset On-ramp 95
16 Sunset Bl Overcrossing 10017 Church Ln Undercrossing 5018 Getty Center Dr Undercrossing 95
Bridges 1 to 12 are in Segment 1; bridges 19 to 23 are in Segment 3
Sunset Segment—Sepulveda/Montana
• Retaining wall construction from south of Cashmere to Montana.• Includes demolition of pre-existing retaining wall
(completed 8/8 and 8/9)• Erecting panels and soil compaction• Construction of sound wall upon completion of retaining
wall• Work hours: 9:00pm to 6am and 6am to 5pm
• Daytime lane closure only: 9am-3pm• Northernmost portion of wall will be completed after
Montana off-ramp is closed.
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Sunset Segment—Sepulveda/Homedale
• “Shotcrete” of retaining walls east of Sepulveda Bl, between Montana and Bronwood (walls 1720, 1730)• Consists of covering the façade of these walls
with concrete• Wall preparation, shotcrete, and finish:
• Started August 5, will continue to Friday, November 1
• Work hours are 10pm to 6am.• Requires full closure of Sepulveda Bl, 10pm
to 6am, Montana Av to Moraga Dr.
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Sunset Segment—Sepulveda Bl Closures
Required to facilitate NB Sunset off-ramp construction, 1720/30 wall façade finishing and adjacent retaining wall work.
One to One Lane ConfigurationMontana to Sepulveda Way9am-3pm
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Sunset Segment—Sepulveda/Church Ln
• Widening of Church Lane Bridge (ongoing):• August: Continue erecting false work, commencement of
top deck construction.• September: Finalize top deck construction, initiate false
work removal• Work is being conducted within ongoing nighttime closure of
Sepulveda Bl: Montana to Moraga, 10pm to 6am• Anticipated completion: End of February 2014• One to one lane configuration on Church Ln with temporary
height restriction of 14’-2”.
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Sunset Segment—Sepulveda/Moraga Dr
• Ongoing retaining wall construction.• Intermittent closures of on-ramp and off-ramp• Work involves demolition of pre-existing walls, excavation,
setting of wall panels and compaction.• Sound walls will be constructed atop retaining walls.
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Sunset Segment—Moraga Dr Ramps
NB Moraga On and Off-Ramp Permitted Closure Times
Monday to FridayNighttime: Moraga Off-Ramp- 7pm to 6am
Moraga On-Ramp- 8pm to 6amDaytime: Moraga Off-Ramp- 9am to 3pm
Moraga On-Ramp- 9am to 12pm
Saturday and SundayMoraga ramps can be closed at any time.
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Sunset Segment—Moraga Dr Wall Work
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For More Information
Project Hotline: (213) 922-3665
www.metro.net/I-405
www.facebook.com/I-405project
Twitter: http://twitter.com/I-405
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