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 was completed on time and within budget and open to traffic in October 2011.

The project was unique as the 5-lane structure over I-10 was completely demolished and reconstructed in a seven month period.  Contractor incentives were included with this project to achieve restoring traffic flow on Riverside Avenue in seven months.  Riverside Avenue is a major arterial between State Route 60 in Riverside and Interstate 15 in Fontana (over 15 miles) and the corridor is adjacent to multiple industrial and logistical facilities that generate heavy truck traffic.  The City agreed to have this corridor severed for seven months and reconstructed in one phase rather than phase reconstruction of the overcrossing, which would have taken an estimated 21 months.  By using the method of bridge construction proposed, this project was delivered to the public at least one year earlier than would have been done using conventional construction methods.  Emergency services were contacted early to coordinate responses to potential emergencies that could arise while the structure was being rebuilt.  Several public meetings were also used to inform the public and local trucking companies of the planned construction and the schedule as the project progressed.

Federal, State and local funding sources were used for this project, including State Transportation Corridor Improvement Funds and Federal Demonstration funds.  Southstar Project Managers were key in helping deliver the PS&E and Construction phases, including coordinating with San Bernardino Associated Governments staff when issues arose during construction that required quick responses to keep the project on schedule and avoid claims by the contractor.