PROJECT STUDY REPORTS
SR-60 & SR-57/Grand Avenue Interchange Improvements
City of Industry, CA
Client: PBS&J, City of Industry
City initiated the project as a relatively straight-forward
interchange improvement to support the upcoming 600-acre industrial development. Subsequently, the project evolved into a major freeway
and interchange improvement project, likely to support a new football stadium on the 600-acre site.
The project included the generation and study of improvement alternatives and preparation of a
Project Study Report. Alternatives ranged from improving the existing configuration, revising the
configuration to a partial cloverleaf examining two variations including loop on-ramps or loop
off-ramps, to the extensive reconstruction from the south SR-57/SR-60 confluence to the north SR-57/SR-60 confluence either by separate and parallel mainlines or a freeway mainline for one route with a collector-distributor system for the other route on each side of the mainline. Widening of Grand Avenue and overcrossing replacement overcrossing were included in all alternatives.
Project was coordinated with the ongoing Caltrans construction contract for HOV lanes and the MIS
for the "big-fix" project being conducted by MTA.
Significant coordination occurred between the cities of Industry and Diamond Bar. Project constraints included the County golf course adjacent to the
southeasterly side of the freeway, a natural watercourse parallel to the north side of the freeway,
Diamond Bar's direction to reduce the Grand Avenue configuration to 6 lanes within their limits, the
limited weaving distance between the interchange ramps and the SR-60/SR-57 connectors,
restrictive right-of-way conditions, and high traffic volumes. We prepared utility disposition sheets,
right of way sheets, the right of way data sheet, the storm water data sheet, accident analysis, and
quality assurance review on the geometrics, fact sheets, cost estimates, and assistance with the PSR.