Interstate 405 Sepulveda Pass Northbound Carpool Lane
Los Angeles, CA
The I-405 Sepulveda Pass northbound carpool lane and widening project was a eight-mile freeway improvement project spanning from Interstate 10 to the State Route 101 and Interstate 405 interchange in Los Angeles California. DLCE’s staff took a major role in the preparation of design drawings for construction. This included the completing highway geometric design and cross section details for the modification of street crossings. Design worked also included the modification of on and off ramps along with local streets and roads redesign. DLCE staff used the latest design software (Microstation, Inroads).
I-405 Improvements Project (OCTA)
Orange County, CA
The California Department of Transportation (Caltrans) is widening the San Diego Freeway (I-405) between State Route 73 (SR-73) and Interstate 605 (I-605). The project spans 16 miles and will involve making improvements to freeway entrances, exits, and bridges as well as adding one regular lane in each direction between Euclid Street and I-605. Additionally, the project will add 405 Express Lanes, incorporating the existing carpool lanes and a new lane in each direction between SR-73 and I-605.
Our firm is currently providing construction engineering support services for major bridge overcrossing and undercrossings, structural retaining walls, and Mechanical Stabilization Embankment (MSE) walls. Our engineering analysis will also include work on bridge structures, cost estimating, quantities, design reviews, and analysis. We work closely with our clients, carrying out design checks for compliance with local and national design standards, using the latest engineering structural and design tools plus providing CADD support services.
State Route 710 South Environmental Freeway Improvements
Los Angeles, CA
The SR-710 Improvement study project is an MTA funded project. The project studies involved the analysis of a number of alternatives starting at the north end of the SR-710 to connect the SR-210 (Pasadena). A number of alternatives were evaluated, including a highway and/or transit tunnel, bus rapid transit (“BRT”), highways, street improvements, light and underground heavy rail systems. The objective of the study is help alleviate traffic congestion within the area and Los Angeles basin. DLCE’s staff was responsible in the preparation of a number of technical reports. DLCE prepared numerous electronic drawings which include the identification of conflicts of the existing utilities with respect to the new proposed facilities. We also reviewed and evaluated a number of track alignments
Interstate 605 Freeway Corridor “Hot Spots”
Los Angeles, CA
This project encompasses the preparation of a corridor analysis report and drawings for MTA & Caltrans for the future reconstruction of I-605 interchanges and freeway facilities in Los Angeles Count. The corridor analysis identified chronic traffic congestion areas, potential capacity and operational improvements, and considered adjacent development and right-of-way limitations, also referred to as “Hot Spots”. The freeway corridors evaluated include SR-91 from I-710 to the Orange County line, I-605 from SR-60 to I-405 freeway, and I-405 from Lakewood Boulevard to just south of the I-605 interchange. They also include areas along the I-105 from I-710 to I-605 and SR-60 east and west of I-605. DLCE staff prepared detail documents for the identification of aboveground and underground utilities along the I-605 corridor. DLCE prepared all documentation with the latest design and CAD software (Microstation).
State Route 125 – San Diego Council of Governments, Caltrans District 11
San Diego, CA
The South Bay Expressway 125 South toll road) is a 9.2-mile, privately-developed southern extension of SR 125, extending from San Miguel Road in Bonita, CA near the Sweetwater Reservoir to SR 905 in Otay Mesa, near the International Border. The project connects the only commercial port of entry in San Diego to the regional freeway network. DLCE was involved in the preparation of the environmental planning study and provided design support to the design-build concessionaire. This included highway and local streets and roads geometric design, grading, estimating and utility identification/relocation. Also played a major role in the preparation of final plan, specifications and estimates (PS&E) for existing local roads at Fanita Road, Santee Avenue to South of Navajo Bridge. DLCE staff prepared hydrologic and hydraulic report. Locate existing underground and above ground utilities, identified conflicts and propose relocation of utility lines. Prepare utility matrix that identified all major utilities. Prepared quantities for final estimates.
State Route 94 – San Diego Council of Governments/Caltrans District 11
San Diego, CA
SR-94 is a two-lane rural highway that provides vehicular and truck access from the San Diego urban area to the southeastern communities of the county to the International Port of Entry at Tecate. DLCE prepared Advance Planning Studies for several bridges along this 20mile corridor. Also, DLCE prepared designs for a number of bridge widenings and retrofits in accordance to Caltrans design specifications.