I-405 Sepulveda Pass Improvements Project. Community Advisory Committee September 23, 2010

Transcription

1 I-405 Sepulveda Pass Improvements Project Community Advisory Committee September 23,

2 Click to edit Master title style Click to edit Master text styles Regional Project Updates Second level Third level Fourth level» Fifth level 2

3 Click to edit Master title style Click to edit Master text styles Second level Questions and Answers with Caltrans Maintenance Third level Fourth level» Fifth level 3

4 Click to edit Master title style Click to edit Master text styles Project Update MWD LA-29 Second level Third level Fourth level» Fifth level 4

5 Church Lane BlitA Beloit Avenue N NTS May 2010 October 2010 Beginning October 2010, lasting approx. 6 months 5

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13 MWD LA-29 Project More Information Contact Information Located on back of handout Website Search MWD LA-29 13

14 Click to edit Master title style Click to edit Master text styles Safety Measures When Relocating Utilities Second level Third level Fourth level» Fifth level 14

15 Relocating Utilities Safety Measures Click to edit Master title style Identification i of underground d utilities i begins during the Preliminary Engineering & Design phase Click to edit Master text styles Project owners collaborate with local utility companies to create master plan sheets describing utility locations Second level Third level Fourth level» Fifth level Plan sheets are incorporated into project design; structures may be modified to reduce utilities moved During final design, designer sends teams to verify location of utilities and their depth 15

16 Relocating Click to Utilities Safety edit Master Measures title style (Contd.) Key underground d utility lines (petroleum products, natural gas, high h voltage electrical) are identified on plans and by above ground markers Click to edit Master text styles To use their specialized skills, key utility owners use their crews to move key utilities Second level Third level Fourth level» Fifth level Before digging near known utilities, contractor is required by law to mark with white paint the limits of the work area and then notify the Dig Alert agency Pot holing is used to confirm and document the exact location, elevation, path and size of the underground utility 16

17 Relocating Click to Utilities Safety edit Master Measures title style (Contd.) Contractor takes an extra step on I-405 project Click to edit Master text styles Before any digging, a dig permit must be completed Internal form requires the crew or work task leader to identify: Reason for digging Depth and methods to be used to dig Location of any known utilities Dig Alert ticket number for the marking of the work area Second level Third level Fourth level» Fifth level 17

18 Click to edit Master title style Click to edit Master text styles Mulholland Bridge Second level Third level Fourth level» Fifth level 18

19 Mulholland ll Bridge Issues Raised by CAC Access to MECA corridor during construction Emergency response during construction Impacts of two, 54-hour full-freeway closures on adjoining communities Reduced capacity on the bridge during utility relocation and bridge reconstruction Impact to morning commuter traffic Aesthetic continuity 19

20 Mulholland ll Bridge Benefits of New Design Existing Mulholland Bridge can remain open while new bridge is built no disruption of Mulholland traffic Minimize utility relocation Minimize amount and duration of full freeway closures Consistent with approved aesthetics Cost savings due to shortened span, single-phase demolition and construction 20

21 Mulholland ll Bridge Operational Considerations i Caltrans, LADOT, Metro and the design-builder are working to provide the most efficient traffic design for moving traffic. 21

22 Click to edit Master title style Click to edit Master text styles Skirball Bridge and Ramps Second level Third level Fourth level» Fifth level 22

23 Click to edit Master title style Click to edit Master text styles Skirball Bridge and Ramps Second level Third level Fourth level» Fifth level Current Skirball Traffic Conditions 23

24 Skirball Click Bid Bridge to edit and Master Ramps title style Click to edit Master text styles Issues raised by CAC about relocated SB ramps Congestion on Sepulveda Bl Increase of traffic signals on Sepulveda Bl Safety for drivers Bicyclist and pedestrian access Adequate storage in turn pockets Second level Third level Fourth level» Fifth level 24

25 Skirball Bid Bridge and Ramps Click to edit Master title style Issues raised by CAC about relocated SB ramps Click to edit Master text styles Park and ride lot farther from ramps Second level Southbound travelers to Mulholland Dr must back track Weaving/merging vehicles between SB ramps and Skirball Third level Center Dr Fourth level» Fifth level 25

26 Skirball Bid Bridge and Ramps Click to edit Master title style Alternative ramp/bridge designs considered d Keep Skirball ramp configuration as is Click to edit Master text styles Shift Skirball Bridge north or south of its current location Create a single-point interchange on Skirball Bridge Second level Third level Fourth level» Fifth level Create split diamond southbound ramps at Mulholland Bridge Relocate southbound lanes south of current Skirball Bridge 26

27 Skirball Bid Bridge and Ramps Click to edit Master title style Keep Skirball Bridge and ramp configuration as is Pros Click to edit Master text styles Commuters accustomed to this layout Ramps separated from Sepulveda Potential cost savings Second level Third level Fourth level» Fifth level 27

28 Skirball Bid Bridge and Ramps Click to edit Master title style Keep Skirball Bridge and ramp configuration as is Cons Click to edit Master text styles Does not improve existing traffic conditions Traffic flow will continue to get worse with this configuration Second level Third level Back-ups on Skirball Bridge and Sepulveda Bl from drivers waiting to enter I-405 Fourth level Signals operate as one complex intersection creating delays» Fifth for drivers level Difficult maneuvers for drivers Construction staging likely more difficult 28

29 Skirball Bid Bridge and Ramps Click to edit Master title style Shift Skirball Bridge north or south of its current location Pros Click to edit Master text styles Could build new Skirball Bridge while keeping current Second bridge openlevel Minimize traffic impacts during construction Cons ROW acquisition required Construction cost and schedule impacts Possible interference with current or proposed ramps Would not align with Skirball entrance Third level Fourth level» Fifth level 29

30 Skirball Bridge and Ramps Click to edit Master title style Create a single-point interchange on Skirball Bridge Pros Click to edit Master text styles Keeps southbound ramps on Skirball Bridge Ample ramp storage Minimizes construction impact to Sepulveda Bl Appears to be cost effective Second level Third level Fourth level» Fifth level 30

31 Skirball Bridge and Ramps Click to edit Master title style Create a single-point interchange on Skirball Bridge Cons Click to edit Master text styles Does not improve existing traffic conditions Requires new bridge for animal crossing Creates more difficult pedestrian and bicyclist crossing Would affect Sepulveda Bl traffic Creates concern for traffic signalization Second level Requires some ROW acquisition, which increases project cost Third level Fourth level» Fifth level Additional conflicting movements and traffic volume, potentially decreasing safety 31

32 Skirball Bridge and Ramps Click to edit Master title style Create split diamond southbound ramps at Mulholland Bridge Pros Click to edit Master text styles Simplifies operations on Skirball Bridge Second level Allows LADOT to operate signal on Sepulveda more efficiently Could be built on Caltrans land Third level Fourth level» Fifth level 32

33 Skirball Click Bridge to edit and Master Ramps title style Create split diamond southbound ramps at Mulholland Bridge Cons Click to edit Master text styles Second level Not environmentally approved; recirculation of EIR will be required, resulting in 18-month delay, increasing cost and lengthening construction schedule Creates new impacts on MECA corridor and Mulholland Dr Third level Fourth level» Fifth level Length and height of ramps may create new visual, environmental impacts Separates visitor traffic from Skirball Center 33

34 Skirball Click Bridge to edit and Master Ramps title style Create split diamond southbound ramps at Mulholland Bridge Cons (Contd.) Increases traffic circulation delay Click to edit Master text styles Second level Increases traffic volumes on Skirball and Mulholland bridges Third level Fourth level» Fifth level Wider bridge structure required to accommodate additional lanes May cause/create neighborhood traffic management issues 34

35 Skirball Bridge and Ramps Click to edit Master title style Relocate southbound lanes south of current bridge Pros Click to edit Master text styles Alleviates congestion and improves traffic flows Second level Improves LADOT s ability to time and operate signals on Sepulveda and Skirball Third level Fourth level» Fifth level Simplifies complicated series of intersections on Skirball Bridge Saves time for commuters on Sepulveda and Skirball Can be constructed without prolonged closures of existing ramps 35

36 Skirball Bridge and Ramps Click to edit Master title style Relocate southbound lanes south of current bridge Pros Improves safety Increases capacity on Sepulveda Bl Click to edit Master text styles Bicycle lane improvements on Sepulveda Bl Reduction in air pollution Second level Third level Fourth level» Fifth level 36

37 Skirball Bridge and Ramps Click to edit Master title style Relocate southbound lanes south of current bridge Cons Click to edit Master text styles Travelers to Mulholland Dr must backtrack Distance from Park-N-Ride to new Skirball ramps Places more vehicles on Sepulveda Bl to access ramps Second level Third level Fourth level» Fifth level 37

38 Thirty-Day y Construction Look Ahead 38

39 Wilshire Segment Top 5 Upcoming Activities Santa Monica bridge widening Wall construction north of Wilshire Bl SB I-405 at Wilshire lh abutment forming Ohio Av utility relocation and widening Beloit Av sound wall demo and reconstruction 39

40 Wilshire Segment Location Activity Closures/Notes Wilshire Blvd loops, p, W of 405 Work Hours Projected Date Build MSE wall Day Sep/Oct Pouring and forming abutments Night November Replacing on-ramp WB Wilshire to SB 405 on-ramp closed 14 days Night December Wilshire UC Set girders and false work Temp. full closure of Wilshire Blvd Night November 40

41 Wilshire Segment Location Activity Closures/Notes Walls 1672/1686, North of Wilshire, East of 405 Demo existing sound wall Build MSE retaining/sound wall Lane reductions on Sepulveda Bl, NB 405 Lane reductions on Sepulveda Bl, NB 405 Work Hours D/N D/N Projected Date Mid-Aug Oct/Nov Wall 1685, N of Clear and grub Lane reductions on Sepulveda Bl Night End Aug Constitution, West of 405 Excavate soil Lane reductions on Sepulveda Bl Night Sept Build MSE retaining/sound wall Lane reductions on Sepulveda Bl Night Oct/Nov 41

42 Wilshire Segment Location Activity i Closures/Notes Work Hours Projected Date Santa Monica Blvd Drive Pile Day September Build retaining/sound i wall Temp night closures of ramps, 405 D/N Ot/N Oct/Nov Widen bridge Temp night closures of ramps, 405 D/N Oct/Nov Ohio Ave Relocate multiple utilities Temp closures of Ohio Av Day October Widen bridge, drive pile Lane reduction on Ohio Av Day January

43 Wilshire Segment Location Activity i Closures/Notes Work Hours Projected Date Wall 1640, Bad Clear/grub, Excavate soil Night September News Bears Field Demo barrier, excavate wall Temp lane closures on NB 405 D/N Ot/N Oct/Nov Build CIP sound wall Temp lane closures on NB 405 D/N Nov/Dec Cotner on- Clear/grub, excavate soil Temp on-ramp closures to NB 405 Night September ramp to NB 405 (between Pico/Olympic) MSE wall construction, north and south of ramp Temp on-ramp closures to NB 405 Night Oct/Nov 43

44 Wilshire Segment Location Activity Closures/Notes Beloit Av, Santa Monica to Olympic Bl Work Hours Projected Date Demo outer portions of sound wall Night October Drill shafts, build new MSE sound wall Day November Demo existing sound wall D/N Mar 2011 E. Dowlen Dr (VA property) Jack and bore pit Closure of E. Dowlen until late Aug D/N Thru Oct 44

45 Wilshire Segment Proposed Wilshire Ramps Proposed off-ramp Proposed on-ramp I-405 FWY 45

46 Mulholland Segment (Sepulveda to Ventura) Top 5 Upcoming Activities Skirball Bridge traffic reconfiguration Skirball Bridge demolition and reconstruction activity Relocated southbound Skirball on-ramp construction Construction of retaining walls north of Getty Trail Head to Skirball Bridge Development of new crusher site 46

47 Mulholland Segment Area Activity Closures/Notes Getty Trail Head New crusher site development Retaining walls construction Will develop another crusher site slightly north of the Getty Trail Head Will build two retaining walls along the northbound freeway. No resident within impacted perimeter. Work Hours Day/ Night Day/ Night Projected Date Late September Ongoing NB I-405 Retaining wall Will begin construction of three additional Day/ Late Between Getty Trail Head & Skirball Bridge construction retaining walls along the northbound I-405. Night September 47

48 Mulholland Segment Work Area Activity Closures/Notes Hours Sherman Oaks (west of I-405) Clearing and Grubbing Area grading and construction of retaining wall Closure of two right hand lanes on the SB I-405 and Valley Vista on-ramp Construction trucks in/out via mainline; only small vehicles use residential streets. Closures of southbound Skirball ramps. Day/ Night Day/ Night Projected Start Date Ongoing until October Ongoing until October

49 Mulholland Segment Projected Area Activity Closures/Notes Work Hours Date Valley Vista Utility relocation Will need to relocate two utilities to support Day TBD sound wall construction. Project team is working to minimize impact to community. House demolition The work zone will get set-up behind Day TBD behind temporary fencing Clear and grub Access to the work zone area will entail access Day/Night TBD from street and freeway Sound wall construction Access to the work zone area will entail access from street and freeway Day/Night TBD 49

50 Mulholland Segment Work Projected Area Activity Closures/Notes Hours Date Skirball Bridge Construction yard set- up and early prep work Construction yards within Caltrans right-of-way. Will continue to prepare bridge for upcoming demolition. Day/ Night Ongoing until Oct. Traffic reconfiguration i for Work includes closing the eastbound right hand lane Night Completed sidewalk construction of the bridge and K-rail placement, resulting in two weeks of freeway directional closures Traffic reconfiguration for bridge reconstruction Bridge demolition Work includes re-striping of traffic lanes, reducing the SB off-ramp by one lane, relocation of traffic signals, and k-rail (concrete barriers) placement Will demo bridge in stages over seven nights. During demo, night closure for bridge and freeway. Night Mid September Night Mid - October Relocated southbound Skirball on-ramps construction Will begin construction of retaining walls and relocated southbound on-ramp Night Early November 50

51 Skirball Bridge Traffic Reconfiguration for Temporary Sidewalk Construction I-405 FWY Skirball Widening Project (City Project) K-rail (concrete barrier) Traffic lane reconfiguration Work zone area 51

52 Skirball Bridge Traffic Reconfiguration for Bridge Reconstruction SB off-ramp lane reduction I-405 FWY Skirball Widening Project (City Project) K-rail (concrete barrier) Traffic lane reconfiguration N Existing SB onramp to remain Temporary traffic lights and signs Work zone area Shoulder expansion Temporary Sidewalk Temporary Crosswalk 52

53 Sunset Segment g Click to edit Master title style (Waterford to Sepulveda) Top 5 Upcoming Activities iti Click to edit Master text styles Exxon Mobil tie-in with 36 hour closure Second level Montana Undercrossing demolition of GSRD and reconstruction ti prep-work Walls 1720/1730 (Sepulveda/Homedale) construction Sunset Bridge reconstruction and abutment demolition Wall 1746 (north of Sunset) construction Third level Fourth level» Fifth level 53 53

54 Sunset Segment Click to edit Master title style Work Hours Click to edit Master text Projected styles Date Location Activity Closures/Notes Sepulveda between Montana and Sunset Sepulveda Homedale/ Bronwood Walls 1720/1730 Utility relocation: Sewer line (2), water line & fire hydrant on Bronwood, fiber optic line. DWP pulling underground wires Clear and grub (vegetation removal) and build access TBD Day/Night September/October Homedale and Bronwood periodically Maintain one lane in each direction of traffic Second level Days / Nights Day Third level Mid-September to Fourth November level» Fifth level Ongoing Drill pile TBD; Maintain one lane in Day Mid-September each direction of traffic 54 54

55 Sunset Segment Click to edit Master title style Location Activity Closures/Notes Walls 1720/1730 (continued) Retaining wall construction - permanent tie backs Lateral walls and soundwall construction Work Hours Click to edit Master text styles TBD; Maintain one lane in each direction of traffic TBD; Maintain one lane in each direction of traffic Day Projected Date Early October Second level Third Mid-October level Fourth level» Fifth level Sunset on Temporary Exxon Mobil Nightly closures of Sunset Bl NB on Day/Night September24-26 ramp and oil line relocation Sepulveda Bl ramp; 36-hour single directional traffic lane on Sepulveda Bl to connect line-in under Sunset Bridge Sunset Demolition of Lane closures Night Week of September Bid Bridge abutments, 4 nights 27 Day Reconstruction Equipment deliveries with night intermittent closures of Sunset Bl; Abutment foundation pile drilling Day/Night On going

56 Sunset Segment Click to edit Master title style Location Atiit Activity Closures/Notes Work Hours Projected Date Wall 1746 Utility relocation: Time Warner, sewer line Click TBD; to maintain edit one lane Master in Day/Night text Early styles October each direction of traffic Second level Wall construction TBD; maintain one lane in Day/Night Mid October each direction of traffic Thurston Circle New gas line installation Maintain access to residents Montana Bridge Demolition associated with widening of bridge TBD; maintain one lane in each direction of traffic Third level Fourth level» Fifth level Day as much as possible Day/Night August/September Mid September Demolition of GSRD Maintain one lane in each direction of traffic Day September 25 56

57 Sunset Bridge Replacement Work Click to edit Master title style Click to edit Master text styles I-405 Freeway N Second level Third level Fourth level» Fifth level Wall

58 Social Media Outreach Real-Time Updates All updates now available at Same information posted to Twitter and Facebook sites Latest Totals Twitter has 1,624 followers Facebook has 703 followers Nixle has 225 subscribers 58 12

59 For More Information Project Hotline: (213) t/405 Twitter: Nixle: nixle.com 59