updated May 2015

As a result of a federal grant secured by the City of Diamond Bar through the Safe Accountable Flexible Efficient Transportation Equity Act - a Legacy for Users (SAFETEA-LU), Grand Avenue will receive nearly $2 million worth of beautification work later this year. The federal grant will enable improvements to the intersections at Diamond Bar Bouelvard and Longivew Drive, both of which are considered primary gateways into the city. The funds will provide for a combination of lanscaping, paving, lighting and public furnishing improvements.

PowerPoint Presentation Depicting Final Approved Design and Project Goals (PDF - click on link to open)


Start date:
May 20, 2015
Anticipated completion:
August 2015
Work hours:
7:00 a.m. - 5:00 p.m.


  • Lane closures and turning restrictions will be imposed throughout construction. Expect delays and use alternate routes.
  • Businesses open during construction.

Public Works Department - 909.839.7040 publicworks@diamondbarca.gov

Additional project-related updates will be posted as they become available.

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