California State Route 163
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| Cabrillo Freeway | ||||
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| Maintained by Caltrans | ||||
| Length: | 11.088 mi (17.844 km) | |||
| Existed: | 1972 – present | |||
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| South end: | A Street and Ash Street in Downtown San Diego | |||
| North end: |
 I-15 in Miramar
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State Route 163 (SR 163), the Cabrillo Freeway, is a state highway in San Diego, California. It is an 11.088-mile (17.844 km) stretch of freeway which was once the southern end of U.S. Route 395 (US 395), the San Diego portion of which was eliminated in 1972. It begins in Downtown San Diego just west of an interchange with Interstate 5 (I-5), extending north to its terminus at I-15 at the south end of Miramar.
The southernmost 2.5 miles (4.0 km) of SR 163 passes through Balboa Park and under the Cabrillo Bridge. Emerging from Downtown San Diego on an intersection with Ash Street, it crosses I-5 before entering Balboa Park. The section of SR 163 south of I-8 through Balboa Park is not Interstate standard, featuring a wide, grassy median with many mature trees. It has only four lanes for the most part and has several sharp curves (for a freeway). In an effort to improve safety along this section, wooden guardrails with steel reinforcement were installed in December 2004 on either side of the grassy median. The section of SR 163 north of I-8 is an Interstate-standard, eight-lane freeway. Just north of the interchange with I-8, the expressway treks north, climbing uphill from Mission Valley to Linda Vista, where it has an interchange with Genesee Avenue. After a northbound only exit with Mesa College Drive / Kearny Villa Road, the interchange with I-805 is northbound only in the northbound direction and southbound only in the southbound direction. In Kearny Mesa, the freeway has interchanges with Balboa Avenue, and Clairemont Mesa Boulevard, in which between the two interchanges, it gains a frontage road on both sides of the freeway. Following the Clairemont Mesa Blvd. interchange, it heads north to SR 52, where it forms one part of one of the biggest bottlenecks in San Diego County. The freeway then heads north to Kearny Villa Road, which was a former route of I-15, before terminating at the current I-15 near Miramar and the southern terminus of the reversible lanes of I-15. Ramps were built to allow traffic on SR 163 to enter and exit the express lanes of I-15.
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