State Route 110 (California)

Interstate 110 and State Route 110
I-110 and SR 110 highlighted in red
Route information
Defined by
Maintained by Caltrans
Length:	31.82 mi (51.21 km)
History:	Highway in 1930s, number in 1964 (SR 11), 1978-1981 as an interstate
Component highways:	I-110 from San Pedro to Los Angeles SR 110 from Los Angeles to Pasadena
Major junctions
South end:	SR 47 / Gaffey Street in San Pedro
	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
Counties:	Los Angeles
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future State highways in California Interstate U.S. State Pre-1964 History Unconstructed Deleted Freeway Scenic ← SR 109 SR 111 →

Route 110, consisting of State Route 110 (SR 110) and Interstate 110 (I-110), is a state highway in the Los Angeles area of the U.S. state of California, built to freeway standards. The entire route connects San Pedro and the Port of Los Angeles with Downtown Los Angeles and Pasadena. The southern segment from San Pedro to Interstate 10 in downtown Los Angeles is signed as I-110, while the northern segment to Pasadena is signed as SR 110. The entire length of I-110, as well as SR 110 south of the Four Level Interchange with US 101, is the Harbor Freeway, and SR 110 north from US 101 to Pasadena is the historic Arroyo Seco Parkway, the first freeway in the western United States. I-110 is one of two 3-digit interstate designations to appear on opposite coasts, with I-280 in California and New Jersey being the other.