Cal-NExUS

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The California Numbered Exit Uniform System (Cal-NExUS) is the California Department of Transportation's (Caltrans) program for numbering the exits of California's freeways. The program began in February of 2002^[1]. The system assigns exit numbers south-to-north and west-to-east on a mile-based system, where each exit is numbered based on how far it is from the highway's southern or western terminus. Contrast this with a sequential numbering system, which numbers exits in sequential order, regardless of distance between exits.

The program is not well-funded, so exits are only being signed with numbers when signs need to be replaced. As the efficiency of an exit numbering system for navigational purposes depends on all exits being consistently numbered, the usefulness of the system while only some exits are numbered is limited. Originally the initial completion date for this project was set as November 2004. The current deadline for completion of the project is November 2008.

As of 2004, of the 5,936 exits in California, 359 are in full compliance (6.0%), 786 are in minimum compliance (13.2%), and 1,115 are in partial compliance (18.8%). There are 2,498 numbered exit signs. Compliance varies widely from district to district. For example, in District 3, in north-central California in the area around Sacramento, 34% of exits are in full compliance and 51% are in partial compliance, whereas in District 7, Los Angeles and Ventura counties, no exits are in full compliance and 4.4% are in partial compliance.