Special routes of U.S. Route 30
Several special routes of U.S. Route 30 exist. In order from west to east they are as follows.
Oregon
St. Helens business loop
U.S. Route 30 Business in St. Helens, Oregon uniquely uses "Interstate Business Loop" shields. This route was designated and is maintained by the local government and does not appear in the official state highways list unlike other business routes.Portland bypass
U.S. Route 30 Bypass serves as a bypass of Portland, Oregon, following several streets through the city's northern neighborhoods. It is designated as the Northeast Portland Highway No. 123 by the Oregon state government.The bypass route terminates to the west at US 30 in northwest Portland and crosses the Willamette River on the St. Johns Bridge. It travels northeast through Cathedral Park on Philadelphia Avenue, Ivanhoe Street, and Richmond Avenue before turning east onto Lombard Street. The route follows Lombard Street across Portland's northern residential neighborhoods, intersecting Oregon Route 99W, I-5, and Oregon Route 99E. Near Portland International Airport, it dips southeast past the eastern terminus of Columbia Blvd. before an interchange with I-205. The route then leaves Portland on Sandy Boulevard and continues through Fairview before reaching its eastern terminus at an interchange with I-84 and US 30 in Wood Village.
US 30 Bypass was established in the 1930s and designated as a state highway in 1937. The bypass route originally ended at the intersection of Killingsworth Street and Sandy Boulevard in eastern Portland, as the latter carried US 30. In 1955, US 30 was relocated to the new Banfield Expressway and US 30 Bypass was extended along its former alignment to Wood Village. Portions of the bypass on Lombard Street were widened to four lanes in 1965 by eliminating on-street parking.
Ontario business loop
U.S. Route 30 Business is a business route signed in the Ontario, Oregon area. This road is part of the Olds Ferry-Ontario Highway No. 455.Wyoming
Kemmerer–Diamondville bypass
U.S. Route 30 Bypass serves as a bypass of Kemmerer and Diamondville Wyoming.Green River business loop
U.S. Route 30 Business is a business route signed in the Green River, Wyoming area. This road is entirely overlapped with Interstate 80 Business Loop.;Major intersections
Rock Springs business loop
U.S. Route 30 Business is a business route signed in the Rock Springs, Wyoming area. Like the one in Green River, the road is entirely overlapped with the Interstate 80 Business Loop.Rawlins business loop
U.S. Route 30 Business is a business route signed in the Rawlins, Wyoming area. Like the ones in Green River and Rock Springs, the road is entirely overlapped with the Interstate 80 Business Loop.Nebraska
Columbus alternate route
U.S. Route 30 Alternate is an alternate route in the Columbus, Nebraska area. The route begins in central Columbus where US 30 and US 81 meet, then heads eastbound in a concurrency with US 81 north. The route departs from US 81 heading onto Lost Creek Parkway, which loops around the north side of Columbus. Then it curves south, becoming East 6th Avenue, where it ends at its eastern terminus at the intersection with US 30 in east Columbus. The entire highway serves as a truck route for US 30 travelers.;Major intersections
Iowa
Marshalltown business loop
U.S. Route 30 Business is a business route that runs along Iowa Avenue in Marshalltown, Iowa. The route runs on the former alignment of US 30 through the town, a 1950s-era bypass of Marshalltown that was bypassed in 1997 by a freeway south of the original bypass.Toledo–Tama business loop
U.S. Route 30 Business is a business route located in Toledo and Tama. In the early 2010s, a new freeway was built for US 30 between the two cities. When the freeway opened, the business route was designated along the old route.Cedar Rapids emergency route
U.S. Route 30 Emergency is an emergency bypass of a segment of the US 30 freeway bypass of Cedar Rapids, Iowa. Since the Cedar Rapids bypass of US 30 was completed in 1985, on occasion, traffic has had to be rerouted off the road. The bypass's proximity to the Union Pacific Railroad mainline resulted in an elevated roadway between Edgewood Road and Sixth Street SW. When strong winds come from the south, fog produced by an Archer Daniels Midland plant adjacent to the highway billows over the road making driving dangerous. The Iowa DOT set up an emergency detour from Edgewood Road SW north to 16th Avenue SW east to 6th Street SW back to US 30. The frequency of fog-related detours has decreased in recent years due to improved technology and the plant's expansion and relocation of cooling towers away from the highway.Ohio
Van Wert business loop
U.S. Route 30 Business is a locally-designated business loop that follows the original route of US 30 and the Lincoln Highway through downtown Van Wert, Ohio.Dalton alternate route
U.S. Route 30 Alternate is a alternate route through downtown Dalton, Ohio. It follows the original route of US 30 through town, while the mainline designation follows a 4-lane bypass.Pennsylvania
Bedford business loop
U.S. Route 30 Business is a business loop through the borough of Bedford, Pennsylvania. In 1970, US 30 became a freeway around the town, to avoid congestion for travellers along the Pennsylvania Turnpike or U.S. Route 220, a pair of area freeways from which Bedford was a major travel stop. After the creation of the bypass, the original path of US 30 along Pitt Street became a business route, travelling as a narrow two-lane stretch through the town, with a four-lane segment near some light industrial development before its eastern terminus.Everett business loop
U.S. Route 30 Business is a business loop through the borough of Everett, Pennsylvania. In 1982, a freeway bypass was constructed around the town because of its low-speed limits and lack of opportunities for highway widening. As a result, the original alignment of US 30 became a business route. It is two lanes through the small, crowded town. Near the eastern edge of the routing, alternate third passing lines are provided, as the road traverses a county park and a golf course.Chester County business loop
U.S. Route 30 Business is a business route of US 30 in Chester County, Pennsylvania. The route follows the former alignment of US 30 between Sadsbury Township and East Whiteland Township, passing through Coatesville, Downingtown, and Exton. US 30 follows a freeway bypass between these two points. The present alignment of US 30 Bus. was originally part of a turnpike called the Philadelphia and Lancaster Turnpike that was completed in 1794. The state took over the turnpike in the beginning of the 20th century. In 1913, present-day US 30 Bus. was incorporated into the Lincoln Highway, an auto trail that ran from San Francisco to New York City. The Lincoln Highway through Pennsylvania became Pennsylvania Route 1 in 1924. US 30 was designated concurrent with PA 1 west of Philadelphia in 1926, with the PA 1 designation removed two years later. US 30 was widened into a multilane road through Chester County in the 1930s. In the 1960s, US 30 was moved to a freeway bypass around Coatesville and Downingtown, with US 30 Bus. designated onto the former alignment of US 30. In 1995, US 30 Bus. was extended east when US 30 was extended to bypass Exton.Coatesville business loop alternate truck route
U.S. Route 30 Business Alternate Truck is a truck route of US 30 Bus. around a weight-restricted bridge over the West Branch Brandywine Creek in Coatesville, on which trucks over 30 tons are prohibited. The route follows Airport Road, US 30, and PA 82. Signs were posted in 2025.Downingtown business loop alternate truck route
U.S. Route 30 Business Alternate Truck is a truck route of US 30 Bus. around a weight-restricted bridge over the East Branch Brandywine Creek in Downingtown, Pennsylvania, on which trucks over 36 tons and combination loads over 40 tons are prohibited. The route follows US 322, the US 30 freeway, and PA 113. US 30 Bus. Alt. Truck runs concurrent with US 322 Alt. Truck along US 30 and PA 113.;Major intersections
Former
Portland business loop
U.S. Route 30 Business was a business route for U.S. Route 30 in eastern Portland, Oregon, running along Burnside Street and Sandy Boulevard. Unlike a standard business route, neither end was at US 30 - the west end was at Oregon Route 99E at the east end of the Burnside Bridge, and the east end was at U.S. Route 30 Bypass at the Interstate 205 interchange. It crossed US 30, which is concurrent with Interstate 84, at around its midpoint. The whole route was the Sandy Boulevard Highway No. 59 until July 10, 2003, when it was given to the city. The US 30 Business designation was removed from what had become a city street on July 5, 2007.Though the west end was just south of an interchange with US 30/I-84, there are no ramps pointing in the correct direction. The reason for this strange end is that US 30 originally exited I-84 there and ran south on Route 99E, and then turned west onto the Burnside Bridge through downtown. When US 30 was realigned to use Interstate 5 and Interstate 405 around the north side of downtown, US 30 Business remained the same.
;Major intersections