Among the Los Angeles County Metropolitan Transportation Authority’s (LA Metro) current projects is the 57/60 Confluence Project is a three-phase program of improvements consisting of ramp and interchange reconfigurations as well as the addition of auxiliary collector/distributor and bypass lanes to significantly reduce the weaving and the resulting congestion and accidents.

Among the Orange County Transportation Authority’s (OCTA) current projects is to add a general purpose lane and extend a second HOV lane along Northbound and South bound I-5 from SR-73 to El Toro Road to enhance mobility and safety for 360,000 motorists in southern Orange County.

County of Los Angeles – Purple Line Subway Extension Project

Being the biggest public works project in the West Coast, at a budget of $9 billion, the Metro Purple Line (D Line) Extension Transit Project is a critical link in the Los Angeles County (LA) transit network serving the westside cities with seven new stations and over 9 miles of tunnels. This will provide a safe, reliable, and affordable high-speed connection between downtown Los Angeles and one of LA’s busiest areas, the Westside, which are the two largest job centers in LA. transportation. This is also one of the “28 for 28” high-profile projects funded by METRO and the Federal government for the 2028 Los Angeles Olympics.

ADVANTEC is the prime consultant to LA METRO on this “Early Action Project" for Caltrans District 7. ADVANTEC is responsible for the project from the Preliminary Assessment/Environmental Document (PA/ED) phase; including NEPA and CEQA support (technical studies) and approval, through the Plans, Specification and Estimate (PS&E) phase and finally Construction Support and close out.

The project provides active traffic management (ATM) and integrated corridor management (ICM) strategies on Route 405 from Rosecrans Avenue to Route 90 to maximize corridor wide system performance and maxamize freeway capacity to address congestion. ADVANTEC was responsible for supporting the development of the Concept of Operations (ConOps) and finalizing the locations of Traffic Management System (TMS) elements including census stations, Ramp Metering Systems (RMS), CCTV, changable message signs (CMS), and ATM gantries, dynamic signs, kane-by-lane dynamic lane management signs, maintenance vehicle pullouts and VDSs in preparation of the draft Project Report.

This project consists of the preparation of Plans, Specifications and Estimates (PS&E) for sidewalk, curb and gutter, retaining wall and driveway improvements along the west side of Serfas Club Drive between Pine Crest Drive and Monterey Peninsula Drive in unincorporated Riverside County near Corona, CA. The objective of the project was to “fill” in a sidewalk gap closure, adjust top of curb profiles to alleviate drainage ponding and to provided ADA compliant driveway approaches. A retaining wall was required for the sidewalk gap closure.

This project consists of the preparation of Plans, Specifications and Estimates (PS&E) for raised median/roadway improvements, ADA pedestrian ramps, landscaping improvements, signing/striping, traffic signal modifications and street lighting improvements at two signalized intersections; Alicia Parkway at Marguerite Parkway, and Santa Margarita Parkway at Marguerite Parkway. The objective of the project was to increase capacity and improve traffic flow at each intersection by providing dual left turn lanes and increasing the width of existing Class II bicycle lanes; hence providing de-facto right turn lanes.