This 2013 FHWA/Caltrans VE Study of the Year was facilitated by VMS, sponsored by the San Bernardino Associated Governments (SANBAG) with Caltrans local assistance oversight and Parsons as prime consultant for the I-10 Express Lanes Widening project in San Bernardino County, California. The VE study was conducted in March 2013 at Caltrans District 8 Offices. I‐10 is a major commuter link between Riverside and San Bernardino Counties, and a major corridor for the transport of goods and services in the region. Within the project limits, I‐10 is an eight‐lane divided facility. The ultimate concept facility for I‐10 within the project limits is a ten‐lane freeway facility, including two high occupancy toll/express lanes and eight mixed‐flow lanes. HOVs would use the express lanes without paying a toll or paying a discounted toll, while SOVs not meeting the occupancy requirement would utilize the express lanes with payment of a toll. The addition of the express lanes will involve a combination of inside and outside widening, which includes paving of the median and inside widening in some areas. This project is needed to reduce congestion, increase capacity, and generate revenue to improve operations throughout the I-10 corridor with consideration of projected traffic demand and the anticipated impacts to traffic operations.
VE STUDY RESULTS
The VE strategy was developed considering total value improvement for the project. The accepted VE alternatives provide several key performance enhancements that better accommodate mainline operations and traffic demand in the initial phasing, in particular where the highest traffic demand and volumes are anticipated in the more immediate future in Segments 1 and 2 through Sierra Avenue. In total, implementation of the VA alternatives results in an initial cost reduction of $158,910,000, and 9-month reduction in construction schedule. This results in an improvement to project performance of 14% and an increase in project value of 25%.
PERFORMANCE ATTRIBUTE IMPACTS
Mainline Operations Improved riding surface on the outside lanes will improve motorist behavior and driver expectations. Local Operations The accepted VE alternatives will have no impact to local operations. Project Schedule The project schedule is reduced by 9 months through reduction of right-of-way impacts and implementation of VE Alternative 7.1, which presents a project phasing concept that will maximize efficiency and reduce the project schedule. Construction Impacts Modifying the ramp construction reduces right-of-way takes and minimizes the associated community and business impacts. Environmental Impacts The use of more recycled HMA reduces construction waste associated with the project. Maintainability Maintainability is improved through the use of Superpave, which has increased durability over other types of paving. The reduction of landscaping to 3% of project costs will also reduce maintenance for roadside landscaping over the life of the project.
Construction Cost $1,557,700,000
VE Savings $158,910,000
Performance Improved 14%
Value Improved 25%
Alternatives Accepted 6 of 8 (75%)