Construction underway on the thrust blocks of the Gilman Drive Bridge, which will connect east and west campus - primarily providing better connections for graduate housing to main campus and the medical center to the medical school.

This bridge has been on the campus' construction timeline for something like 20 years. Originally, the structural engineering department had plans to build it as a demonstration project for carbon-fibre bridges:

Abstract: The UCSD led I-5/Gilman Advanced Technology Bridge Project will design and construct a fully functional traffic bridge of advanced composite materials across Interstate 5 in La Jolla, California. Its objective is to demonstrate the use of advanced composite technologies developed by the aerospace industry in commercial applications to increase the life expectancy of new structures and for the rehabilitation of aging infrastructure components. The structure will be a 450 ft long, 60 ft wide cable-stayed bridge supported by a 150 ft A-frame pylon with two vehicular lanes, two bicycle lanes, pedestrian walkways and utility tunnels. The longitudinal girders and pylon will be carbon fiber shells filled with concrete. The transverse deck system will consist of hollow glass/carbon hybrid tubes and a polypropylene fiber reinforced concrete deck with an arch action. Selected cables will be composite. The bridge's structural behavior will be monitored to determine how advanced composite materials perform in civil infrastructure applications. The bridge will be instrumented to obtain performance and structural health data in real time and, where possible, in a remote fashion. The sensors applied to the bridge will include electrical resistance strain gages, fiberoptic Bragg gratings and accelerometers.

Francesco Lanza di Scalea, Vistasp M. Karbhari, Frieder Seible, "I-5/Gilman advanced technology bridge project", Proc. SPIE 3988, Smart Structures and Materials 2000: Smart Systems for Bridges, Structures, and Highways, (20 April 2000); doi: 10.1117/12.383138; http://dx.doi.org/10.1117/12.383138

For non-paywall reading, see: Caltrans' Preliminary Evaluation of the Hybrid Tube Bridge System, which covers this project and the actual demonstration project, a boring desert bridge, the King Road Stormwater Channel bridge. Driving across it, you might never guess there was anything unusual about it - Google Earth of Composite Bridge.

The only remaining web-based mentions of the bridge are on a very fragmented Archive.org capture of i5gilman.org from 2002.