Interstate 80 Business (Sacramento, California)

Interstate 80 Business
Capital City Freeway
Business 80, with both the US 50 segment and the unsigned SR 51 segment highlighted in red
Route information
Business route of I-80
Maintained by Caltrans
Length	14.49 mi[1] (23.32 km)
Existed	1981 (from I-80)[2]–present
Component highways	US 50 / I-305 from West Sacramento to Sacramento SR 51 in Sacramento
Major junctions
West end	I-80 in West Sacramento
Major intersections	I-5 in Sacramento US 50 / SR 99 in Sacramento SR 160 in Sacramento
East end	I-80 in North Highlands
Location
Country	United States
State	California
Counties	Yolo, Sacramento
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future State highways in California Interstate US State Scenic History Pre‑1964 Unconstructed Deleted Freeways
← US 50 SR 51 → SR 52

Interstate 80 Business (I-80 Bus), called the Capital City Freeway in its entirety and also known as Business 80, is a business loop of Interstate 80 (I-80) through Sacramento, California, United States. The route is also colloquially referred to as "Cap City Freeway" and "Biz 80". The entire route is a freeway.

It originally carried mainline I-80 through Sacramento until the early 1980s. The eastern half, originally known as the Elvas Freeway, was initially grandfathered into the Interstate Highway System; however, plans to upgrade or realign this portion to meet Interstate Highway standards were canceled. As such, the I-80 designation through Sacramento was moved to a northern bypass of the city that had previously been signed I-880, and the former routing was then designated as Business 80.

I-80 Bus then consisted of two connected segments. The western segment ran concurrently signed with US Route 50 (US 50) and also carried the unsigned designation of I-305. The eastern segment was assigned the unsigned designation of State Route 51 (SR 51). After travelers complained that I-80 Bus was difficult to follow, it was named the Capital City Freeway in 1996. As part of a resigning project which commenced in 2016, references to I-80 Bus on the western segment were being removed, subsequently leaving that portion only signed as US 50. The California Department of Transportation (Caltrans) however still lists the entire route under one I-80 Bus exit list.^[3]