Several special routes of U.S. Route 6 (US 6) exist. In order from west to east, these special routes are as follows.

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U.S. Route 6 Business (US-6 Bus.) is a short highway serving the downtown areas of Helper, Utah. The route begins at an at-grade intersection with US-6/US-191 southwest of Helper and proceeds east on Poplar Street to Main Street; this portion is cosigned with State Route 157 (SR-157). The route turns north onto Main Street, passing through downtown Helper. After curving to the northwest and again to the west, the route ends at a diamond interchange (exit 232) on US-6/US-191.^[2]

U.S. Route 6 Business (US-6 Bus.) is a short highway that loops around the town of Price, Utah, beginning and ending at US-6/US-191 in a span of three miles (4.8 km). SR-55 is cosigned with the route.

U.S. Highway 6 Business (US 6 Bus.) runs for approximately 4.7 miles (7.6 km) through Hastings, Nebraska, north of mainline US 6. It crosses US 34 downtown, before that route turns west to run concurrently with US 6.

U.S. Route 6 Business (US 6 Bus.) followed along Ridge Road, the former alignment of US 6 before the route was moved to the Borman Expressway which also carried Interstate 80 (I-80) and I-94 and half of US 41 through the cities and towns of Northwest Indiana. The route began in Lansing, Illinois, and heads east across the state line into Munster, Indiana, and traveled through Highland, Griffith, the southern part of Gary, and Hobart (where the road was marked as 37th Avenue). The route ended in Hobart at the intersection of US 6, State Road 51 (SR 51), and SR 130.

U.S. Route 6 Business (US 6 Bus.) runs along State Route 108 (SR 108) and SR 110 in Napoleon, Ohio.

Major intersections
The entire route is in Henry County.

More information Location, mi ...

Location	mi	km	Destinations	Notes
Napoleon	0.00	0.00	US 6 / US 24 / SR 108 north (Scott Street) – Defiance, Wauseon, Maumee	Western terminus; western end of SR 108 concurrency; exit 40 (US 6/US 24)
	1.49	2.40	SR 110 begins / Riverview Avenue – Henry County Hospital	Riverview Avenue former SR 424; western end of SR 110 concurrency; western terminus of SR 110
Maumee River	1.58– 1.74	2.54– 2.80	Bridge over the Maumee River
Napoleon	1.79	2.88	SR 108 south (S. Perry Street) / W. Maumee Avenue – Holgate	Eastern end of SR 108 concurrency
Harrison Township	5.70	9.17	US 6 / SR 110 – Bryan, Grand Rapids, Bowling Green	Eastern terminus; eastern end of SR 110 concurrency
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

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U.S. Route 6 Alternate (US 6 Alt.) is an east–west alternate route of US 6 located in Greater Cleveland, traveling 7.30 miles (11.75 km). Its western terminus is at US 6 in Rocky River, Ohio, just west of the Rocky River, overlapping US 6's connection with SR 2; its eastern terminus is just west of the Cuyahoga River in the Ohio City neighborhood of Cleveland. US 20 and SR 113 travel concurrent with US 6 Alt. for 0.2 miles (0.32 km) while they cross the Rocky River. Nearly all of its seven-mile (11 km) span follows Detroit Avenue's alignment through Lakewood and Cleveland, which also carried US 20 Alt. for a time.^[4] The far western portion in Rocky River follows Detroit and Old Lake roads.

US 6 Alt. exists to provide a route for truck traffic, as commercial vehicles are prohibited on Clifton Boulevard.^{[citation needed]}

U.S. Route 6 Alternate (US 6 Alt.) traveled along Euclid Avenue, with US 20 Alt., in Cleveland and East Cleveland, Ohio, from 1936 until 1967, when US 20 was removed from US 6 and routed along Euclid Avenue from Superior Avenue in East Cleveland to Public Square in Cleveland.^[4]

U.S. Route 6 Business (US 6 Bus.) is a four-mile (6.4 km) loop through the city center of Warren, Pennsylvania. In 1989, a freeway bypass for US 6 was completed on the south side of the Allegheny River, while the original routing plus a connecting bridge were designated as a business loop. Except for following Ludlow Street near its western terimus, the route mostly follows Pennsylvania Avenue. It is cosigned with US 62 for the westernmost 1.24 miles (2.00 km) of its route.

Major intersections
The entire route is in Warren County.

More information Location, mi ...

Location	mi	km	Destinations	Notes
Warren	0.00	0.00	US 6 / US 62 south (Grand Army of the Republic Highway) – Corry, Irvine, Sheffield	Western terminus; western end of US 62 concurrency; interchange
	1.24	2.00	US 62 north (Laurel Street) – North Warren	Eastern end of US 62 concurrency
Mead Township	3.89	6.26	US 6 (Grand Army of the Republic Highway) – Sheffield, Corry, Clarendon, Chapman State Park	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

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U.S. Route 6 Business (US 6 Bus.) is a two-mile-long (3.2 km) loop through the borough of Tunkhannock, Pennsylvania. The route was signed in 2000, as a wider (but still two-lane) bypass was constructed along the Susquehanna River to avoid the narrow old alignment. The business loop, also known as Tioga Street, is the main artery of the town.

Major intersections
The entire route is in Wyoming County.

More information Location, mi ...

Location	mi	km	Destinations	Notes
Tunkhannock Township	0.00	0.00	US 6 (Grand Army of the Republic Highway) – Towanda, Nicholson, Scranton	Western terminus; interchange
Tunkhannock	1.35	2.17	PA 29 (Bridge Street) – Montrose, Wilkes-Barre, Skyhaven Airport
	1.96	3.15	US 6 (Grand Army of the Republic Highway) / PA 92 – Towanda, Pittston, Scranton	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

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U.S. Route 6 Business (US 6 Bus.) is a 15-mile-long (24 km) loop through northern suburbs of the city of Scranton, Pennsylvania. The route was formed in 1999, after a freeway bypass was constructed. The route begins as a four-lane undivided highway, featuring a variety of businesses but avoiding the centers of suburbs like Dickson City and Blakely. It then becomes a two-lane route and skirts north of the narrow suburban finger by traveling through Archbald Pothole State Park and Pennsylvania forestry land. Upon entering Carbondale, the route dips south back into suburban development and serves as a narrow two-lane street for the remainder of its route.

Major intersections
The entire route is in Lackawanna County.

More information Location, mi ...

Location	mi[5]	km	Destinations	Notes
Scranton	0.000	0.000	US 11 (Northern Boulevard / Scranton Expressway) / Oak Street – Clarks Summit, Scranton	Western terminus; interchange
	0.229	0.369	I-81 / US 6 – Binghamton, Wilkes-Barre	Exit 191 (I-81 / US 6)
Blakely	3.287	5.290	Hulls Creek Road to PA 347 (Scott Road) – Dickson City, Justus
Archbald	5.214	8.391	PA 247 (Wildcat Road) – Jessup, Scott Township
Jermyn	8.345	13.430	PA 107 (Heart Lake Road/Rushbrook Street) – Jermyn, Mayfield, Tompkinsville, Lackawanna River Heritage Trail	Interchange
Carbondale	12.234	19.689	PA 106 west (Salem Avenue) – Greenfield Township	Eastern terminus of PA 106
	12.520	20.149	PA 171 north (Belmont Street) – Simpson, Vandling, Forest City	Southern terminus of PA 171
Carbondale Township	14.545	23.408	US 6 (Governor Casey Highway) – Honesdale, Dunmore	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

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U.S. Route 6 Truck (US 6 Truck) is a 12.22-mile (19.67 km) truck route of US 6 in eastern Orange County, New York. It begins at the trumpet interchange with US 6 and New York State Route 293 (NY 293) in Woodbury near Harriman State Park, and the route follows NY 293. It heads northwest for 6.82-mile (10.98 km), where it meets US 9W and NY 218 in Highlands. Here, NY 293 ends, and US 6 Truck starts its concurrency with US 9W, heading south. From there, the two routes run concurrently until the Bear Mountain Circle, where the route rejoins US 6 and meets US 202, in Highlands near Bear Mountain State Park. The route serves as a bypass of the Long Mountain Parkway and Palisades Parkway, which are limited to passenger cars only.

Major intersections
The entire route is in Orange County.

More information Location, mi ...

Location	mi	km	Destinations	Notes
Woodbury	0.00	0.00	US 6 (Long Mountain Parkway) – Central Valley, Chester, Peekskill NY 293 begins	Interchange; western terminus; western terminus of Long Mountain Parkway; western end of NY 293 concurrency
Highlands	6.82	10.98	US 9W north / NY 218 north – Newburgh, West Point NY 293 ends	Interchange; eastern end of NY 293 concurrency; northern terminus of NY 293; western end of US 9W/NY 218 concurrency
	7.58	12.20	NY 218 south – West Point, Highland Falls	Interchange; eastern end of NY 218 concurrency
	9.53	15.34	NY 218 north – West Point, Highland Falls, West Point Visitor Center	Interchange; southern terminus of NY 218
	12.22	19.67	US 6 / US 202 (Bear Mountain Bridge) / US 9W south / Palisades Parkway south – Central Valley, Peekskill, Haverstraw, New Jersey	Bear Mountain Circle; eastern terminus; eastern end of US 9W concurrency; northern terminus of Palisades Parkway
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus        Tolled

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U.S. Route 6 Alternate (US 6 Alt.; concurrent with US 202 Alt. for its entire length) is a 10.79-mile (17.36 km) alternate route of US 6 and US 202 in southern Putnam County and northern Westchester County, New York. It begins where US 6 and US 202 meet NY 9D at the eastern foot of the Bear Mountain Bridge and follows NY 9D north to NY 403 in Garrison. From there, it heads south on NY 403 and US 9 to rejoin US 6 and US 202 at the traffic circle north of Peekskill.^[6] The route serves as a bypass of the segment of US 6 and US 202 known as Bear Mountain Bridge Road, a sharply winding route along the Hudson River. This bypass is an important route for commercial vehicles which cannot traverse Bear Mountain Bridge Road, though they are permitted to do so.

Major intersections

More information County, Location ...

County	Location	mi	km	Destinations	Notes
Westchester	Cortlandt	0.00	0.00	US 6 / US 202 (Bear Mountain Bridge) to US 9W / Palisades Parkway – Peekskill, Bear Mountain NY 9D begins	Southern terminus; southern end of NY 9D concurrency; southern terminus of NY 9D
Putnam	Garrison	4.54	7.31	NY 9D north – Cold Spring, Fishkill NY 403 begins	Northern end of NY 9D concurrency; western end of NY 403 concurrency; western terminus of NY 403; eastern terminus of CR 12
	Graymoor	6.81	10.96	US 9 north – Fishkill NY 403 ends	Eastern end of NY 403 concurrency; eastern terminus of NY 403; western end of US 9 concurrency
Westchester	Cortlandt	9.94	16.00	Highland Avenue to Bear Mountain State Parkway – Yorktown	Interchange; southbound exit and northbound entrance
		10.79	17.36	US 6 / US 9 south / US 202 – Peekskill, Bear Mountain, Camp Smith	Annsville Circle; eastern terminus; eastern end of US 9 concurrency
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

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U.S. Route 6A (US 6A) between Newtown and Southbury, Connecticut, was the original surface routing of US 6 before the formation of expressway that later became I-84; currently Route 816.

U.S. Route 6A (US 6A) between Plymouth and Hartford, Connecticut, is currently US 6. At this time, the old US 6 went along Route 64 to downtown Waterbury then along Route 10 to Farmington.

U.S. Route 6A (US 6A) originally connected Woodbury to Willimantic, Connecticut. West of Meriden, this was the original alignment of US 6. When US 6 was reassigned to the former US 6A from Plymouth to Farmington, this became US 6A. This US 6A was subsequently extended through Meriden to Willimantic along modern Route 66. An expressway upgrade was planned for this US 6A. Only a portion of the highway was built and is now I-691.

U.S. Route 6A (US 6A) between Coventry and Windham, Connecticut, was designated when New England Route 3 (Route 3) was deleted. The route was swapped with the old US 6 in 1939 and finally deleted in 1942 when US 6A became Route 31.

U.S. Route 6A (US 6A) in Danielson, Connecticut, was the old routing of US 6 prior to construction of the two-lane freeway.

In Scituate, Rhode Island, US 6 splits into U.S. Route 6 Business (US 6 Bus.) and U.S. Route 6 Bypass (US 6 Byp.), with mainline US 6 following US 6 Byp. The business alignment travels further south along the old turnpike and is mostly signed as US 6 without a banner. The route is also known as Danielson Pike for its entirety. The bypass is signed mostly as US 6 Byp. on sign assemblies but as bannerless US 6 on green guide signs. Most maps and information takes US 6 along the bypass.

The business and bypass cross Route 102 soon after splitting. The western half of the bypass is a two-lane limited-access road, with one grade separation, under Gleaner Chapel Road, and one intersection, at Route 102. This newer section ends as it merges with Route 101, once the Rhode Island and Connecticut Turnpike, and now called Hartford Pike. The two parallel alignments cross the Scituate Reservoir and Route 116 before they merge near the east edge of Scituate. This merge was the east end of the Foster and Scituate Turnpike and was the east end of Route 101 until the early 2000s (when it was truncated to the merge with US 6 Byp.). The Rhode Island and Connecticut Turnpike continued to the Olneyville section of Providence, where it is known as Hartford Avenue.

Major intersections
The entire route is in Scituate, Providence County.

More information mi, km ...

mi	km	Destinations	Notes
0.00	0.00	US 6 east (North Scituate Bypass) – Providence	Western terminus; no access to US 6 east or from US 6 west
0.20	0.32	Route 102 (Chopmist Hill Road) to US 6 – Coventry, Glocester
2.17	3.49	Rockland Road – Clayville
3.42	5.50	Route 116 (West Greenville Road) – Hope, Greenville
4.13	6.65	US 6 east (Hartford Avenue) – Providence	Eastern terminus; no access to US 6 west
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

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U.S. Route 6A (US 6A) is an alternate route of US 6 in Rhode Island. The route begins at US 6 and I-295 in Johnston and follows Hartford Avenue 2.50 miles (4.02 km) through the city. US 6A continues into Providence, traveling 1.20 miles (1.93 km) along Hartford Avenue to its terminus at US 6.

US 6A previously carried mainline US 6 until 1991, when the US 6 designation was moved to the Dennis J. Roberts Expressway replacing the expressway's previous designation of Route 195.

Major intersections
The entire route is in Providence County.

More information Location, mi ...

Location	mi	km	Destinations	Notes
Johnston	0.00	0.00	I-295 / US 6 – Woonsocket, North Attleborough, Hartford, Warwick, Providence	Western terminus; exit 9C (I-295)
	0.97	1.56	Route 5 (Atwood Avenue) – Johnston
	1.94	3.12	US 6 east – Providence	Interchange
Providence	2.58	4.15	Route 128 north (Killingly Street) – Johnston	Southern terminus of RI 128
	3.70	5.95	US 6 to Route 10 / Hartford Avenue – Johnston, Providence	Eastern terminus; interchange; continues as Hartford Avenue
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

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U.S. Route 6 Bypass (US 6 Byp.) was signed along both sides of the Cape Cod Canal in Massachusetts opposite of mainline US 6, which also ran along both sides of the canal along two-way roads. At the eastern terminus of Route 25, US 6 eastbound once crossed the Cape Cod Canal via the Bourne Bridge then followed Sandwich Road along the south side of the canal to the Sagamore Bridge where it joined the Mid-Cape Highway on its way to Provincetown. US 6 westbound would leave the Mid-Cape Highway and cross the Sagamore Bridge then followed the Scenic Highway along the north side of the canal back to the Bourne Bridge. The opposite directions of those two roads were signed as US 6 Byp. (such that the eastbound bypass route was on the north side of the canal while the westbound was along the south side).

Today, both directions of US 6 travels only along the north side of the canal along Scenic Highway. Sandwich Road is now signed "TO 6" from the Sagamore Bridge to the Bourne Bridge, although a single US 6 Byp. sign still exists along Sandwich Road just north of the Bourne Bridge rotary.