What You Need to Know About San Diego's Freeways

San Diego freeways


As much as the sun, sand, and perfect weather are a part of the San Diego way of life, so is another element that's not as pleasant, San Diego freeways. Although the California freeway system is one of the best in the country, it's still the cause for many a headache in the land of the automobile thanks to heavy traffic and high congestion during rush hour every day.

Fortunately, if you learn how to identify and navigate all the freeways, you can save a lot of time during your morning commute or when trying to find your way back to the hotel in the early afternoon. From Interstate 5 to State Route 94, these freeways are the most important roads in San Diego for getting around town.

Interstate 5: The Freeway You Probably Can't Avoid

Whether you call it I-5 or simply The 5, Interstate 5 is the biggest and most-used of the San Diego freeways, and it can take you from the Mexican border up the coast all the way to Canada if you stay on it.

These days, it's pretty busy all hours of the day, but rush hour can try one's patience (roughly 7:30 a.m. to 10 a.m. going southbound and 3:30 p.m. to 6:30 p.m. going northbound on weekdays), especially at major junctions of other freeways, and especially at the notorious 5 and 805 split in Sorrento Mesa.

Interstate 805: Connecting North County to Mission Valley

Speaking of the 5 and 805 split, the I-5's little brother is Interstate 805. The 805 is the inland counterpart to the 5. Bisecting San Diego's bedroom communities, the 805 has become more and more busy in the past decade as commuters flock to more affordable housing in the South Bay area.

The scenic bridge across Mission Valley breaks up the driving monotony, but beware its terminus up north at the notorious I-5 and 805 split, which can get extremely backed up during rush hour.

Interstate 15: The Inland San Diego Mega Freeway

Interstate 15 is a massively wide freeway that starts at Interstate 5 in the South Bay and heads north to the inland San Diego suburbs of Mira Mesa, Rancho Bernardo, Escondido, and Riverside County. For several miles, Interstate 15 has a reversible High Occupancy Vehicle (HOV) carpool lane where you can even pay a toll to use the carpool lane if you don't have a carpool buddy. 

State Route 163: A Scenic Freeway to Downtown San Diego

This San Diego freeway, which connects I-5 downtown with I-15, is most notable for its scenic stretch through Balboa Park. It almost makes it worth putting up with the traffic that can often be found along this freeway during rush hour (going southbound in the morning and northbound in the evenings).

Interstate 8: Connecting the East and West of San Diego

Interstate 8 runs from Point Loma east to El Cajon. It's the main east-to-west freeway in the city, traversing through commercial Mission Valley, up the grade past San Diego State University, through the suburbs of La Mesa and El Cajon, and east to the San Diego County backcountry and mountains. All the major north and south freeways junction with I-8, so traffic during rush hour can often be found at those points.

State Route 78: North County, Inland to the Coast

The major east-to-west freeway serving North County is State Route 78, which is almost always a mess during commuter times. Many people who live in the Escondido, Oceanside, Vista, and San Marcos areas all use this freeway. The worst traffic bottleneck typically happens at the on-ramp for I-15 going in both directions.

State Route 56: The Southern Edge of North County to Poway

State Route 56 breaks off from the I-5 just as the 5 begins its journey through North County San Diego. The 56 freeway then runs through Carmel Valley and connects with the 15 just after Rancho Penasquitos and right before hitting Poway. This is a great route to take just before or after rush hour as it clears up the earliest of all San Diego freeways.

State Route 52: From the Urban Neighborhoods to East County

State Route 52 is a freeway that serves as a northern alternative to I-8, taking commuters from Clairemont in the west to Santee in the east. Freeway 52 runs along the southern edge of Mira Mar, and it gets pretty backed up going west in the morning and east in the afternoon. 

State Route 94: An I-8 Alternate for La Mesa

Also known as the Martin Luther King Freeway, this is the eastern route out of downtown. Though busy, Highway 94 isn't as bad as the 8 and is often a good southern alternate route. It junctures with State Route 125 in La Mesa.

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