Projects

Crews begin work on Los Osos Valley Road project

The highly-anticipated construction project to improve the Los Osos Valley Road, Highway 101 interchange is finally underway.The city of San Luis Obispo is in the first phase of a $33 million project to widen a section of Los Osos Valley Road between Calle Joaquin and South Higuera Street to four lanes.Click Here for more information

Streeter Avenue Grade Separation, Riverside, California (Ongoing Contract, $33M)

The Streeter Avenue Grade Separation project provides for the lowering of Streeter Avenue under the UPRR railroad tracks.  Project site is along an arterial street within a residential area of the City.  Two elementary schools and two churches are less than ½ mile from the site.  The project scope includes the construction of two parallel bridges one to carry Dewey ...

215 Widening – South, Murrieta, California (2012)

In December 2010, the Riverside County Transportation Commission (RCTC) awarded a $15 million construction contract for the widening of six miles of Interstate 215 between Murrieta Hot Springs Road and Scott Road.  Road widening activities started in April 2011 and the Project is now 100% complete. As prime consultant, Southstar, led by Mr. Amr Abuelhassan, MS, PE, QSD, successfully led ...

Iowa Avenue Grade Separation, Riverside, California (Ongoing Contract, $32M)

The Iowa Avenue Grade Separation project provides for the separation of a major arterial street with the BNSF mainline tracks within an industrial area of the City.  Iowa Avenue will be reconstructed to cross over the tracks, being placed on a 3-span pre-stressed cast-in-place concrete box girder structure, measuring  458 feet in length, and 102 feet wide, supported on steel ...

Columbia Avenue Grade Separation, Riverside, California (2010)

This 4-lane roadway bridge was constructed over three tracks of the Burlington Northern Santa Fe Railroad (BNSF).  Construction of the project, located within an industrial area of the City, required the installation of mechanically stabilized embankment (MSE wall, extensive traffic detours, utility relocations, and the realignment of several local streets. Southstar took a proactive approach to addressing the problems that arose ...

MAGNOLIA AVENUE GRADE SEPARATION, RIVERSIDE, CA

The 2-span steel girder railroad bridge provided for two tracks of the Union Pacific Railroad (UPRR) over a 4-lane major arterial street within a commercial area of the City.  The work required the construction of temporary soldier pile walls in order to keep traffic flowing along the Magnolia Avenue commercial corridor.  Permanent MSE walls were constructed for the underpass.  A ...

I-5 Widening Construction Traffic Mitigation Projects- JPA

Southstar Engineering is providing project and construction management services on I-5 Widening Construction Traffic Mitigation Projects. Our team is delivering Project Management and Construction Management services on a group of traffic mitigation projects within the Cities of La Mirada, Norwalk and Santa Fe Springs. Tasks include the delivery of a group of rehabilitation and signal projects from the scoping phase to construction ...

I-10/Riverside Avenue Interchange, Caltrans EA 42230

This recently completed interchange reconstruction project widened the Riverside Avenue Overcrossing over Interstate 10 (I-10) in Rialto from 5 to 9 lanes, providing additional left turn capacity for vehicles accessing I-10.  The project also widened all four ramps, constructed auxiliary lanes and installed ramp metering at the entrance ramps to manage the traffic flow onto I-10.  This $25 million project ...

I-10 Tippecanoe Avenue Interchange, Caltrans EA 44810

This project proposed to reconstruct the Tippecanoe Avenue Interchange on Interstate 10 (I-10) in the Cities of San Bernardino and Loma Linda.  This heavily congested interchange is the access point for many different destination points.  This includes Loma Linda Medical Center, Loma Linda Veterans Administration Hospital, Loma Linda University, the logistical uses adjacent to the San Bernardino International Airport, including ...

I-10 Auxiliary Lane Addition, Caltrans EA 49750

This project added 5 miles of auxiliary lanes to Interstate 10 (I-10) between Etiwanda and Riverside Avenues in San Bernardino County.  The $12 million project provides safety and operational improvements on I-10 between Ontario and Rialto by providing an additional lane for weaving between merging and diverging mainline traffic. This project was designed to complement interchange reconstruction projects along the I-10 ...

I-10/Cedar Avenue Interchange, Caltrans EA 1A830

This project proposes to widen the Cedar Avenue Overcrossing from 6 to 8 lanes over Interstate 10 (I-10) in an unincorporated area of San Bernardino County known locally as Bloomington.  The project will also widen ramps from two to four lanes and construct auxiliary lanes at the entrance ramps to I-10 and widen Cedar Avenue from Slover Avenue to Valley ...

I-10/Cherry Avenue Interchange, Caltrans EA 46800

This project proposes to widen the Cherry Avenue Overcrossing from 5 to 9 lanes over Interstate 10 (I-10) and reconfigure the I-10/Cherry Avenue interchange in the City of Fontana.  This $47 million project will provide additional lanes on Cherry Avenue between Valley Boulevard and Slover Avenue and reconfigure the westbound ramps to provide right turn access onto I-10 for both ...

I-10/Citrus Avenue Interchange, Caltrans EA 46810

This project proposes to widen the Citrus Avenue Overcrossing from 5 to 8 lanes over Interstate 10 (I-10) and reconfigure the I-10/Citrus Avenue interchange in the City of Fontana.  This $47 million project will provide additional lanes on Citrus Avenue between Valley Boulevard and Slover Avenue and reconfigure the westbound ramps to provide right turn access onto I-10 for both ...

I-10/Cypress Avenue Overcrossing, Caltrans EA 46770

This project led by the City of Fontana constructed a new 4-lane overcrossing structure over Interstate 10 (I-10) on Cypress Avenue, between the Sierra Avenue and Citrus Avenue interchanges in the City of Fontana.  The $13 million project was designed to provide a means for north and southbound traffic in the City to cross over I-10 without having to travel ...

I-10 High Occupancy Vehicle Lane Extension, Caltrans EAOC250

This project proposes to widen Interstate 10 (I-10) and extend the High Occupancy Vehicle lane from Haven Avenue in Ontario eastward to Ford Street in Redlands.  This 25-mile long project is estimated to cost $1 billion and is part of SANBAG’s Measure I renewal program.  The project is intended to relieve congestion on I-10, especially during peak periods and to ...

I-10 Ramp Metering and Widening, Caltrans EA 38434

This project will widen eleven entrance ramps and install metering devices to improve traffic flow and relieve congestion on Interstate 10 (I-10) between Cedar Avenue and Interstate 215. This $10 million project will incorporate state of the art technology in detecting traffic flow on the freeway mainline and determine when ramp meters should be activated.  This will be an important ...

Interstate 15/State Route 30 (State Route 210) Interchange Project, Fontana and Rancho Cucamonga, California

The I-15/SR-30 (SR-210) Interchange project paved the way and was the first segment under construction of the recently completed State Route 210 Corridor project, the first new freeway corridor in the District since the 1970’s.  Southstar personnel worked on the design and construction phases of the $100 million project, the largest in District 8 at the time.  There was a ...

I-15/Duncan Canyon Road Interchange, Caltrans EA OH130

This project proposes to construct a new interchange on Interstate 15 (I-15) at Duncan Canyon Road in the City of Fontana.  The $30 million project will provide an additional access point to I-15 in the north Fontana area. This new interchange was originally planned when I-15 was constructed in the mid-1970’s. The project is expected to bring jobs and development ...

60/91/215 Interchange Design, RCTC

Professional Services 2004 The Southstar team was instrumental in the design of this high-profile project.  Southstar was tasked with all coordination and management of Environmental, Design, and R/W staff and was responsible for project delivery through construction.   Project features include: Four miles of HOV lanes and widened freeways on I-215, SR-60, and SR-91 New soundwalls and retaining walls throughout the project Major structural ...

SR-91 Corridor Improvement Project (CIP) Caltrans EA 0F540

The State Route 91 Corridor Improvement Project (91 CIP) is a $1.3 billion design-built project sponsored by RCTC. As depicted in the graphic below, the project will add two toll express lanes, one general purpose lane and auxiliary lanes in each direction, from SR-241 to Pierce Street, east of I-15. The project will also include toll express lane only direct ...