Interstate 110 and State Route 110 (California)

Interstate 110 and State Route 110
Harbor Freeway
I-110 and SR 110 highlighted in red
Route information
Maintained by Caltrans
Length	31.819 mi[1] (51.208 km)
Component highways	I-110 from San Pedro to Los Angeles SR 110 from Los Angeles to Pasadena
Tourist routes	Arroyo Seco Parkway
Restrictions	No trucks over 3 tons north of exit 24A
Major junctions
South end	SR 47 in San Pedro
Major intersections	I-405 in Carson SR 91 in Los Angeles I-105 in Los Angeles I-10 in Los Angeles US 101 in Los Angeles I-5 in Los Angeles
North end	Glenarm Street in Pasadena
Location
Country	United States
State	California
Counties	Los Angeles
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future State highways in California Interstate US State Scenic History Pre‑1964 Unconstructed Deleted Freeways
← SR 109 SR 111 →

Interstate 110 (I-110) and State Route 110 (SR 110) are two connected highways in Los Angeles County, California. They go between the Port of Los Angeles and Pasadena, going through Downtown Los Angeles. Between the Port of L.A. and Interstate 10, the road is called the Interstate 10. It is called California State Route 110 between Interstate 10 and Pasadena. The whole route is also called the Harbor Freeway. The route is about 32 miles (51 km) long.^[2][3]

Exits

Except when a letter is put before it, postmiles were measured on the road as it was in 1964, based on how it was at the time, and do not necessarily show the current mileage. R reflects a change in the route since then, M indicates a second change, L refers an overlap because of a correction or change, and T indicates postmiles that were temporary (for a full list of prefixes, see the list of postmile definitions).^[1] Segments that have not been built or are now controlled locally may be left out. The entire route is in Los Angeles County.

Location	Postmile [1][4][5]	Exit [6]	Destinations	Notes
San Pedro	R0.93		Gaffey Street – San Pedro	Southern terminus of I-110; southern end of Harbor Freeway[7]
	R0.93	1A	SR 47 (Vincent Thomas Bridge)  – Terminal Island, Long Beach	SR 47 exit 1B
	R1.23	1B	Channel Street / Pacific Avenue	No southbound entrance
Wilmington	2.77	3A	Harry Bridges Boulevard
	3.26	3B	Anaheim Street
	4.06	4	SR 1 (Pacific Coast Highway)  – Torrance, Beach Cities
West Carson	5.45	5	Sepulveda Boulevard
	6.52	7A	223rd Street	Northbound exit is via exit 7
	7.02	7B	Carson Street	Signed as exit 7 northbound
	7.74	8	Torrance Boulevard
Carson–Los Angeles line	8.78– 9.07	9	I-405 (San Diego Freeway)  – Santa Monica, Long BeachModule:Jct warning: "road" parameter is deprecated	190th St. not signed northbound; I-405 is former SR 7; I-405 exit 37 northbound, 37A southbound
Los Angeles	9.87	10	SR 91 (Gardena Freeway)  – Beach Cities, Riverside	Signed as exits 10A (east) and 10B (west) northbound; SR 91 exit 6
	​	—	I-110 Express Lanes – Harbor Gateway Transit Center	Southbound exit and northbound entrance
	11.24	11	Redondo Beach Boulevard
	11.89	12	Rosecrans Avenue
	12.90	13	El Segundo Boulevard
	13.82	14A	I-105 (Glenn Anderson Freeway)  – Norwalk, LAX Airport	Signed as exits 14A (east) and 14B (west) northbound; I-105 exit 7B
	​	—	I-105 east	Southbound exit and northbound entrance for Express Lanes only
	13.97	14B	Imperial Highway
	​	—	I-105 west  – LAX Airport	Southbound exit and northbound entrance for Express Lanes only
	14.97	15	Century Boulevard	No southbound entrance
	15.98	16	Manchester Avenue	Former SR 42
	16.98	17	Florence Avenue
	​		I-110 Express Lanes / 39th Street – Coliseum / Adams Boulevard / Figueroa Street	Last access point from main northbound I-110 lanes
	17.51	18A	Gage Avenue
	17.98	18B	Slauson Avenue
	18.50	19A	51st Street	Southbound exit and northbound entrance
	19.00	19B	Vernon Avenue	Signed as exit 19 northbound
	19.50	20A	Martin Luther King Jr. Boulevard – Los Angeles Memorial Coliseum, Exposition Park, Banc of California Stadium
	​		I-110 Express Lanes	North end of Express Lanes; first access point from main southbound I-110 lanes
	20.00	20B	37th Street / Exposition Boulevard
	20.71	20C	Adams Boulevard
	21.44	21	I-10 (Santa Monica Freeway)  – Santa Monica, San BernardinoModule:Jct warning: "road" parameter is deprecated	Northern terminus of I-110; southern terminus of SR 110; no northbound exit to Washington Boulevard; I-10 exits 13A-B
	21.76– 22.12	22A	Pico Boulevard / Olympic Boulevard – Downtown Los Angeles	Northbound exit is part of exit 21
	22.36	22B	9th Street / 8th Street – Downtown Los Angeles	Signed as exit 22 northbound
	22.83	23A	6th Street / Wilshire Boulevard
	23.04	23B	4th Street
	23.04	23C	3rd Street
	23.73	24A	US 101 to I-5 south (Santa Ana Freeway) / I-10 east (San Bernardino Freeway) / SR 60 east (Pomona Freeway)  – Hollywood, Santa Ana, San Bernardino, Pomona	Four Level Interchange; northern end of Harbor Freeway; southern end of Arroyo Seco Parkway; US 101 exit 3 northbound, 3B southbound
	23.96	24B	Sunset Boulevard	Southbound exit and northbound entrance
	24.55	24C	Hill Street – Chinatown, Civic Center	No southbound entrance; signed as exit 24B northbound; left exit southbound
	24.73	24D	Stadium Way – Dodger Stadium	Signed as exit 24B northbound
	25.04	25	Solano Avenue / Academy Road
	​	Figueroa Street Tunnels; northbound only
	25.48	26A	I-5 north (Golden State Freeway)  – Sacramento	Northbound left exit and southbound entrance; I-5 exit 137B southbound
	25.78	26B	Figueroa Street	Northbound left exit and southbound entrance; former SR 159
	25.91	26A	Avenue 26	Southbound exit and northbound entrance; former SR 163
	26.12	26B	I-5 (Golden State Freeway)  – Santa Ana	Southbound exit and northbound entrance; I-5 exit 137B northbound, 137A southbound
	27.12	27	Avenue 43
	28.05	28A	Avenue 52
	28.38	28B	Via Marisol
	28.76	29	Avenue 60
	29.28	30A	Marmion Way / Avenue 64	Northbound exit and southbound entrance
	29.50	30	York Boulevard	Southbound exit and entrance
	30.10	30B	Bridewell Street	Northbound exit only
South Pasadena	30.59	31A	Orange Grove Avenue
	31.17	31B	Fair Oaks Avenue – South Pasadena	No northbound entrance
Pasadena	31.91		Glenarm Street	At-grade intersection; northern terminus of SR 110; northern end of Arroyo Seco Parkway[7]
	31.91		Arroyo Parkway	Continuation beyond Glenarm Street
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Electronic toll collection       Incomplete access       Route transition

References

1. California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original (XLS file) on September 5, 2015. Retrieved June 30, 2015.
2. 2007 Named Freeways, Highways, Structures and Other Appurtenances in California (PDF). Caltrans. p. 71. Archived from the original (PDF) on October 14, 2012. Retrieved March 27, 2007.
3. Ryan, Colin (April 9, 2010). "America's First Freeway: The Arroyo Seco Parkway, aka, the 110". Truck Trend. El Segundo, California: Extreme Venturs, LLC. Retrieved April 10, 2018.
   "The History of the Arroyo Seco Parkway". Departures. KCET. October 24, 2011. Retrieved April 10, 2010.
   Kevin Break (2015). Bridges of Downtown Los Angeles. Arcadia Publishing. p. 94. ISBN 978-1-4671-3353-1.
   Johnson, Davey G. (June 29, 2006). "America's First Freeway: The 110". Jalopnik. Gizmodo Media. Retrieved April 10, 2018.
   National Park Service's Heritage Education Services. "Arroyo Seco Parkway". Route 66. United States Department of the Interior. Retrieved April 10, 2018.
   Sproul, Suzanne (August 28, 2017). "Arroyo Seco Parkway, California's first freeway, celebrates 75 years". Los Angeles Daily News. Retrieved April 10, 2018. The Arroyo Seco Parkway, once called the Pasadena Freeway (110 Freeway) before the name was changed back in 2010, is considered by many to be the first freeway in the state and in the nation.
   Rick Thomas (2008). The Arroyo Seco. Arcadia Publishing. ISBN 978-0-7385-5608-6.
4. California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
5. California Department of Transportation, All Traffic Volumes on CSHS Archived July 21, 2011, at the Wayback Machine, 2006
6. California Department of Transportation, California Numbered Exit Uniform System, I-110 Archived 2017-10-02 at the Wayback Machine, accessed January 2008
7. "2014 Named Freeways, Highways, Structures and Other Appurtenances in California" (PDF). California Department of Transportation. Archived from the original (PDF) on July 1, 2015. Retrieved June 20, 2015.