Measure I: Interstate 10 Carpool Lanes

Carpool lanes along I-10 in OntarioCompleted in January 2000, the Interstate 10 high occupancy vehicle (HOV) lanes, better known as carpool lanes, extend 9.9 miles from the Los Angeles / San Bernardino County line to Interstate 15. These lanes stretch through the cities of Ontario and Montclair.

This was a combination of four separate projects:

  • Construction of carpool lanes, funded by SANBAG
  • Rehabilitation of pavement and construction of a barrier rail, funded by Caltrans
  • Reconstruction of the Central Avenue interchange, funded by the City of Montclair
  • Reconstruction of the Mountain Avenue interchange, funded by the City of Ontario

This $110 million effort was funded by a combination of funds from Measure I, the Congestion Mitigation and Air Quality (CMAQ) program, the State of California, the City of Montclair, and the City of Ontario. Caltrans administered the design and construction of this project.