Our Featured Projects
University Drive Street Improvement
City of Carson, CA
About the Project
The City of Carson initiated the University Drive Street Improvement project to rehabilitate and modernize a 1.8-mile segment of University Drive between Avalon Boulevard and Wilmington Avenue. This east-west arterial serves key destinations including California State University Dominguez Hills, Dignity Health Sports Park, and surrounding neighborhoods and businesses. The goal of the project is to restore pavement condition, close sidewalk gaps, and bring pedestrian facilities into ADA compliance.
AYCE Consulting Engineers Role
AYCE is currently providing full design services for this federally funded project in compliance with Caltrans LAPM procedures. The scope of AYCE’s work includes:
• ADA-compliant curb ramps and driveway upgrades
• New sidewalk construction
• Pavement rehabilitation
• Utility coordination
• Traffic signing & striping
• Construction and bid support
Heading 5
About the Project
The City of Los Angeles partnered with multiple agencies including Cannon Engineering Consultants and AYCE Consulting Engineers, Inc. as the subconsultant to improve sidewalks and curb ramps to be ADA compliant throughout the City of Los Angeles.
City of Los Angeles Sidewalk Repair Program: Task Order 13
AYCE Consulting Engineers Role
AYCE oversaw three sites and provided the cost estimate:
Site 1303 – 6376 W Riggs Pl, CD 11, Site 1429 – 7758 S Boeing Ave, and Site 1371 – 2946 S Harvard Blvd.
The scope of the work included:
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Field Visits: Visiting sites to measure the sidewalks and sloping
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General: Feasible sidewalk improvements to provide cross slopes between 2.083% and 0.5% and maximize sidewalk widths and pedestrian paths of travel within the public right-of-way
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Driveways/Alleys: Design and construction of sidewalk across driveways prioritizing compliance of the sidewalk over improvement of the driveway apron slope and scraping
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Non-Walkable Surfaces and Areas: Non-walkable surfaces within the public right-of-way not to reduce or obstruct the pedestrian path of travel following Residential Parkway Landscaping Guidelines
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Transition Panels: Tie new improvements to existing improvements with running slopes designed to be max 5%
LA Metro I-105 Express Lane Segments 1, 2, and 3 PS&E Project
Los angeles, CA
About the Project
Los Angeles County Metropolitan Transportation Authority (Metro), in cooperation with the California Department of Transportation (Caltrans) District 7, proposes to improve the Interstate 105 (I-105) corridor between Sepulveda Boulevard in the City of Los Angeles and Studebaker Road in the City of Norwalk. Improvements include the addition of two Express Lanes in each direction on I-105 by converting the existing single high-occupancy vehicle lane and widening some sections of I-105 within Caltrans right of way.
AYCE Consulting Engineers Role
As Roadway Design Subconsultant to WSP, AYCE is tasked with the following:
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Caltrans Freeway Design
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Design Standard Decision Documents (DSDD)
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Plans Preparation Manual Compliant Design
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Caltrans Standards
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Safety Analysis
Heading 5
About the Project
The I-5 Managed Lanes Project is a 12-mile-long project that proposes to construct along I-5 corridor one managed lanes between Red Hill and SR-55; two managed lanes from SR-55 to SR-91; and one managed lane between SR-91 and county line. The scope of work also includes a new ground anchor wall in front of the abutments of Lincoln Ave OC; and West Broadway OC reconstruction to accommodate the weaving lane in both directions.
I-5 Managed Lanes PAED Project
Caltrans D12, Orange County, CA
AYCE Consulting Engineers Role
As Roadway Design Subconsultant to WSP, AYCE was tasked with the following:
• Caltrans Freeway Design
• Design Standard Decision Documents (DSDD)
• Plans Preparation Manual Compliant Design
• Caltrans Standards
• Safety Analysis
CALTRANS SR-210 ADA Ramp Upgrades Design Build
14 Cities along 42 miles of SR-210,
Los Angeles County, CA
(Cities of Los Angeles, Glendale, La Crescenta-Montrose, La Canada-Flintridge, Pasadena, Arcadia, Monrovia, Duarte, Irwindale, Azusa, Glendora, San Dimas, Laverne, and Claremont and the County of Los Angeles)
About the Project
California Department of Transportation partnered with Sully-Miller Contracting Co. and AYCE Consulting Engineers, Inc. on the successful delivery of this State Route 210 ADA Curb Ramp Upgrades design-build project.
Project improvement provided improved access and enhanced safety for users of all ages and abilities by upgrading curb ramps, along with the installation of Accessible Pedestrian Signals (APS) system and pedestrian countdown timers to conform to current ADA standards.
This project upgrades existing American Disabilities Act (ADA) pedestrian facilities and various locations within the project limits. The scope of work is as follows:
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Upgrade 264 existing curb ramps to comply with current ADA standards
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Correct pavement slope & reconstruct spandrels
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Full depth pavement structural replacement
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Install detectable warning surfaces
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Remove and restripe pedestrian crosswalks and limit lines
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Remove and relocate existing obstructions
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Install new roadside signage
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Upgrade pedestrian push-buttons and install APS system and pedestrian countdown timers
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Remove and relocate or upgrade street lighting electroliers, luminaires, traffic signal poles, traffic signal mast arms, electrical cabinets, and conduits to eliminate obstructions from the curb ramp footprint and provide minimum standard clear width.
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Remove impacted traffic loops and install new traffic loops
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Relocate utility pull boxes and covers; adjust manholes to grade
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Relocate or modify conflicting drainage features
AYCE Consulting Engineers Role
AYCE Consulting Engineers, Inc. was the prime engineering firm with its principals David Woo as the design manager and Kandice Nguyen as the lead engineer. All design services were completed by in house staff.
Project Elements:
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Design Build
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Caltrans and AASHTO standards and Specification
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Latest ADA Compliance for Accessable Design
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Caltrans Facilities
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Local Street Facilities
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Working with 14 Stakeholder Cities
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Complete Street
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Intersection Improvements
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Traffic Signals
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Traffic Control
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Signing and Striping
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Lighting
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Drainage
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Construction Management
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Construction Inspection
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Schedule
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Claims Support
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Office Engineer Support
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Materials Testing Support
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As-Built Plans
OC 405 Managed Lanes Widening Design Build Project
Orange County, CA
About the Project
Orange County Transportation Authority, in partnership with Caltrans District 12, have widened the I-405 for 16 miles between SR-73 and I-605 through six corridor cities. The project added one general-purpose lane and one high-occupancy toll (HOT) express lane in each direction, along with the replacement of 18 bridges. Designed to improve freeway capacity, enhance interchange operations, and increase overall safety, the project brought the corridor up to current state and federal standards. Construction was completed in 2023 on schedule and on budget.
AYCE Consulting Engineers Role
AYCE served as part of the design and quality leadership team on this major regional effort. Kandice Nguyen, PE, Principal Engineer, led roadway design for the Segment 3 roadway packages as a subconsultant to Arup, coordinating closely with OCTA, Caltrans, and multiple corridor jurisdictions. David Woo, PE, Principal Engineer, served as the All Segment Project Design Quality Validation Engineer throughout design and construction, ensuring compliance with OCTA/Caltrans standards, technical accuracy, and constructability across project deliverables.
OC Streetcar Project
Orange County, CA
About the Project
Orange County Transportation Authority in conjunction with City of Santa Ana have partnered with Walsh Constructor to deliver the OC Streetcar Project.
OC Streetcar will increase transportation options and provide greater access along its 4.15-mile route between downtown Santa Ana and Garden Grove. On March 4, 2019, the Orange County Transportation Authority (OCTA) issued Notice to Proceed with construction to Walsh Contractor. Construction activities are underway.
AYCE Consulting Engineers Role
As a design consultant to Walsh Contractor, AYCE provided design of temporary traffic signal and video detection camera electrical plans during construction to 60 intersection traffic control stages.
Project Relevance:
• Project Coordination Meetings
• Final Design Plan Preparation
• Plan Processing and Support
• Third Party Coordination
• Multi-disciplinary coordination
• Responding to RFIs
Shoreline Drive Realignment Project
City of Long Beach, CA
About the Project
The Shoreline Drive Realignment project improvements provide more efficient access to the I-710 corridor, improved connectivity to the downtown and waterfront areas, more contiguous park space, and better connectivity between recreational areas such as Cesar E. Chavez Park and the Drake/Chavez Soccer Fields. The project facilitates and encourages active transportation modes by adding Class I Bike/Ped Paths and connectivity to the LARIO trail system along the LA River. Proposed improvements include: realigning northbound (NB) Shoreline Drive with southbound (SB) Shoreline Drive including, south of Ocean Blvd., shifting the alignment so both NB and SB lanes fit under the existing SB span of the existing Ocean Blvd. Overcrossing; reconstructing Broadway from Shoreline to Maine including the demolition of the existing bridge spanning Broadway over existing NB Shoreline Drive; constructing Class I Bike Paths; relocating City of Long Beach stormwater pump station; lowering Golden Shore Street to form an at-grade signalized intersection with Shoreline Drive.
AYCE Consulting Engineers Role
As Roadway Design Subconsultant to GHD, AYCE Consulting Engineers is tasked with designing Shoreline Drive using Caltrans standards and Golden Shore Street using AASHTO standards.
Project Relevance:
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Preliminary Engineering and Final PS&E
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Caltrans and AASHTO standards and Specifications
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City of Long Beach and LACPW Jurisdictions
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Latest ADA Compliance for Accessable Design
City of Long Beach ADA Curb Ramp Upgrades Design Build
About the Project
City of Long Beach Department of Public Works partnered with Sully-Miller Contracting Co. and AYCE Consulting Engineers, Inc. on the successful delivery of the ADA Curb Ramp Upgrades design-build project.
This project provides improved access and enhanced safety for users of all ages and abilities by upgrading curb ramps to conform to current ADA standards.
This project upgrades existing American with Disabilities Act (ADA) pedestrian facilities and various locations within the project limits. The scope of work was as followed:
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Upgrade approximately 250 existing curb ramps to comply with current ADA standards
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Correct pavement slope & reconstruct spandrels
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Full depth pavement structural replacement
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Install detectable warning surfaces
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Remove and restripe pedestrian crosswalks and limit lines
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Remove and relocate existing obstructions
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Relocate utility pull boxes and covers; adjust manholes to grade
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Relocate or modify conflicting drainage features
AYCE Consulting Engineers Role
AYCE Consulting Engineers, Inc. is the prime design firm with its principal Kandice Nguyen, PE as the design manager/lead engineer. Most of the design services are provided in house.
Project Elements:
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Design Build
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Latest ADA Compliance for Accessible Design
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Local Street Facilities
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Complete Street
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Intersection Improvements
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Traffic Signals
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Traffic Control for Busy Intersections
UC Merced Campus 2020 P3 Project
Merced, CA
About the Project
The project included 1.2 million gross square feet of critically needed facilities. This has roughly double the physical capacity of the campus and provide a way for UC Merced to address existing academic and student life needs to enable enrollment growth. Construction began in October 2016 and completed Fall 2020. This project was implemented as a master planned initiative developed by a world-class team of architects, planners, engineers, and construction professionals. The design and construction budget was $1.3 billion and included 13 buildings and supporting infrastructures. Every building has achieved at least a LEED Gold Certification.
Project Relevance:
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P3 Project
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Caltrans and AASHTO standards and Specifications
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City of Merced and County of Merced Jurisdiction
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Latest ADA Compliance for Accessible Design
AYCE Consulting Engineers Role
As the roadway design subconsultant to Arup, AYCE delivered preliminary and final design of all the associated roadways for the UC Merced 2020 Project. AYCE was tasked to design and prepare construction documents for about 5 miles of campus roadway to juridictional standards and specifications, which included automobile lanes, bicycle trails, pedestrian and ADA accesses.
San Gabriel Trench Project - Alameda Corridor East
San Gabriel, CA
About the Project
The 2.2-mile San Gabriel Trench grade separation project will result in the lowering of a 1.4-mile section of Union Pacific railroad track in a 30 feet deep, 65 feet wide trench through the City of San Gabriel with bridges constructed at Ramona Street, Mission Road, Del Mar Avenue and San Gabriel Boulevard, allowing vehicles and pedestrians to pass over the tracks. The rail line returns to grade east of San Gabriel Boulevard. The rail crossing at Walnut Grove Avenue remains at-grade and required a shallow lowering of the roadway to match the proposed railroad grade.
The San Gabriel Trench construction contract was awarded in July 2012. Construction is complete on the 1.4-mile railroad trench and on the bridges at Ramona Street, Mission Road, Del Mar Avenue and San Gabriel Boulevard. Final project completion is scheduled for Summer 2018. Project cost is estimated at $293.7 million.
AYCE Consulting Engineers Role
As a design engineering consultant to Walsh Contractor, AYCE Consulting Engineers provided engineering design and layout of the temporary traffic controls for the road rehabilitation and ADA access ramp replacements.
Project Relevance:
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Design Support During Contruction
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Caltrans and AASHTO standards and Specifications
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City of San Gabriel and LACPW Jurisdiction
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Latest ADA Compliance for Accessable Design
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Obtained Caltrans District 7 Permits
RCTC SR-91 Express Lanes Design Build Project
Riverside County, CA
About the Project
The Riverside County Transportation Commission opened the 91 Express Lanes in Riverside County on March 20, 2017. The 91 Project extended the proven 91 Express Lanes from the Orange County/Riverside County Line to Interstate 15 in Corona, replacing the previous carpool lanes. A single Express Lane also was added on Interstate 15 from the 91 to south of Magnolia Avenue. Express Lane connectors also were built between eastbound 91 and southbound 1-15 and between northbound 1-15 and westbound 91.
AYCE Consulting Engineers Role
Prior to starting AYCE Consulting Engineers, Ms. Kandice Nguyen, founder and principal of AYCE, was the Roadway Task Lead for Package E pictured above. Package E included 5 miles of freeway improvement with one diamond interchange, one system interchange (SR-91/I-15), 29 retaining walls, and 13 bridges including the express viaduct. Work included preparing GAD, mandatory and advisory exception fact sheets associated with the revised ATC and final roadway construction documents. This included resolving design issues with approval agencies and coordinating with traffic, bridge, and drainage teams.
About the Project
The Kraemer Boulevard project is one of seven bridges or undercrossings being built as part of the $630 million O.C. Bridges program. The goal of each of the projects is to enhance safety and improve commute times by eliminating the need for drivers to wait at rail crossings.
Up to 70 trains, some more than a mile long, travel through the area daily. That number is expected to increase to nearly 130 daily trains by 2030.
AYCE Consulting Engineers Role
Mr. David Woo and Ms. Kandice Nguyen, founders and principals of AYCE Consulting Engineers, prior to starting the company, were the roadway engineers responsible for preparing the final design of this grade separation pictured above. Due to geometric constraints, the original preliminary design called for a three way intersection between Kraemer Boulevard and Crowthers Avenue underneath the BNSF grade separated railtrack. However, with Mr. Woo and Ms. Nguyen's ingenuity of rerouting the utilities and a drainage facilities, they were able to adjust the geometric design and the project was able to accomodate a four way intersection, allowing for throughout traffic and continuity of Crowthers Avenue to the east.
OCTA Kraemer Boulevard Undercrossing Project
Anaheim and Placentia, CA
NDOT US 95 Widening Project at "The Rainbow Curve / Summerlin Parkway Interchange"
Las Vegas, Nevada
About the Project
The project was a total reconstruction of a major four level system to system interchange integrated with a major arterial SPUI interchange. Future 20 year traffic projection for just the US 95 portion of this project was about 400,000 ADT. Major components of the final design included widening the existing US 95 from four lanes with limited shoulders and auxiliary lanes to 10 lanes with full shoulders, auxiliary lanes and HOV lanes with provisions for future widening; the reconstruction of the Rainbow Boulevard interchange with demolition of the two existing bridges and the construction of a Single Point Urban Interchange (SPUI) with the bridge deck over an acre in size; construction of 9 new ramps ranging from system to system direct connectors to the SPUI onramps and offramps and the future HOV direct connect flyovers (now shown); construction of retaining walls and soundwalls; construction of multiuse pedestrian, bicycle trails; construction of ITS components; construction of two new regional flood control detention basins; total reconstruction of the Adcock Elementary School; demolition of numerous single family dwelling units, multifamily condo units and an apartment complex; realignment of Rainbow Boulevard and the connecting side streets; relocation of Nevada Power Company’s major transmission lines and distribution lines; relocation of major water lines; relocation of numerous utilities; construction of a new city park; landscaping and aesthetic treatments, etc.
AYCE Consulting Engineers Role
Prior to starting AYCE Consulting Engineers, Mr. Woo at the height of his design engineering career, was the project manager and lead engineer on this largest NDOT project at the time. Mr. Woo, worked closely with Mr. Joel Leisch, world renowned designer of freeway interchanges and also the author of the AASHTO Greenbook on geometric design. Mr. Woo came up with this geometric design as constructed in the picture above. This interchange is very unique in the sense that due to the physical contraints, it doesn't follow the standard policies on interchange design criteria. However, Mr. Woo was successfully able to make it work. It is the only system to system interchange with a local single-point-urban-interchange weaved meticulously through it in our nation.
NDOT I-15/US-95 Interchange Improvements a.k.a. "The Spaghetti Bowl"
Las Vegas, Nevada
About the Project
The project was a total reconstruction of major four level system to system interchange connecting Interstate 15 and the US 95 near downtown Las Vegas for the Nevada Department of Transportation as the client. This interchange is nicknamed, "The Spaghetti Bowl" and as the name suggests, it's a weaving of 15 strands of ramps and mainlines to form the system to system interchange in Las Vegas, Nevada. In the mid and late part of 1990's, Las Vegas was booming with growth and this project was final designed in 18 months and also major portion of the infrastructure was constructed in another 18 months to meet the needs of the public traffic demand.
AYCE Consulting Engineers Role
Prior to starting AYCE Consulting Engineers, Mr. Woo, founder of AYCE, built his career on designing freeway infrastructures. In the early part of his career, Mr. Woo as project engineer designed many freeway systems in California, Nevada, and Utah. This Spaghetti Bowl Interchange in Las Vegas, Nevada was one of many exemplary projects Mr. Woo had completed.
