Business routes of Interstate 40

Interstate 40
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future

Interstate business routes are roads connecting a central or commercial district of a city or town with an Interstate bypass. These roads typically follow along local streets often along a former U.S. route or state highway that had been replaced by an Interstate. Interstate business route reassurance markers are signed as either loops or spurs using a green shield shaped and numbered like the shield of the parent Interstate highway.

Along Interstate 40 (I-40), business routes are found in the five westernmost states through which I-40 passes, California, Arizona, New Mexico, Texas, and Oklahoma, as well as North Carolina. The Interstate has no business routes along its passage through Arkansas nor Tennessee.

Some states regard Interstate business routes as fully integrated within their state highway system while other states consider them to be either local roads to be maintained by county or municipal authorities or a hybrid of state and local control.

Although the public may differentiate between different business routes by the number of the parent route and the location of the route, there is no uniform naming convention. Each state highway department internally uses its own designations to identify segments within its jurisdiction.

From central Oklahoma westward, the business routes often follow the historic alignment of the former U.S. Route 66 (US 66).

California

Interstate business routes in California are assigned by the California Department of Transportation (Caltrans), but are not maintained by Caltrans unless they overlay other routes of the state highway system. Local authorities may request route assignment from the Caltrans Transportation System Information Program, and all requests require approval of the executive committee of the American Association of State Highway and Transportation Officials (AASHTO).^[1]

Needles

Interstate 40 Business
Location:	Needles
Length:	3.4 mi[2] (5.5 km)

The business loop of Interstate 40 through Needles in San Bernardino County begins at exit 141 of I-40/ US 95 northwest of town. The unsigned highway follows Broadway Avenue to the southeast to Needles Highway, then eastward through an underpass of I-40 into the town center. At N Street, the loop turns southward into the southern part of town where it reconnects with Broadway Ave. The route then continues southeastward to I-40 exit 144 where it terminates and US 95 continues southward along Broadway. The route largely follows the former route of US 66 through town except where the historic highway's path has since been disrupted by the construction of I-40.^[2]

Major intersections

The entire route is in Needles, San Bernardino County.

mi[2]	km	Destinations	Notes
0.0	0.0	I-40 / US 95 – Barstow, Las Vegas, Kingman	Western terminus; I-40 exit 141
3.4	5.5	I-40 / US 95 – Barstow, Kingman, Lake Havasu City, Blythe	Eastern terminus; I-40 exit 144
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Arizona

The business loops within Arizona are maintained by the Arizona Department of Transportation (ADOT) and by municipal authorities. Interstate 40 has five business loops within the state located in Seligman, Ash Fork, Flagstaff, Joseph City, and Holbrook and formerly had loops in Kingman, Flagstaff, and Winslow. ADOT identifies Interstate business loops as State Business Routes followed by the number of the parent Interstate. Individual loops along an Interstate are designated by adding parenthetical numbers that increase eastward and northward. Gaps in numbering represent removal of former routes or potential expansion.

Kingman

State Business Route 40(0)
Location:	Kingman
Length:	0.56 mi[3]:417[note 1] (0.90 km)
Existed:	Before 1998–2009[4]:107–108[5]:519–520

State Business Route 40(0) was a former business loop of I-40 at Kingman in Mohave County. The 3.7-mile (6.0 km) loop began at I-40 exit 48 where US 93 approaches the intersection from the west along Beale Street and joins the Interstate while the loop proceeded eastward along Beale St. After a short distance, the loop joined Andy Devine Avenue which carried the former US 66. The loop turned northward returning to I-40 and US 93 at exit 53 where the loop terminated, but the roadway continues forward carrying SR 66.^[3][6]

Major intersections

The entire route was in Kingman, Mohave County.

mi[3]	km	Destinations	Notes
0.00	0.00	I-40 / US 93 (Beale Street) – Los Angeles, Flagstaff, Phoenix, Las Vegas	Western terminus; I-40 exit 48
3.73	6.00	I-40 / US 93 / SR 66 east (Andy Devine Avenue) – Los Angeles, Las Vegas, Flagstaff, Phoenix, Peach Springs	Eastern terminus; I-40 exit 53
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Seligman

State Business Route 40(1)
Location:	Seligman
Length:	4.25 mi[7]:543 (6.84 km)
Existed:	1983–present[7]:543

State Business Route 40(1) is a business loop of I-40 at Seligman in Yavapai County. The 4 ¹⁄₄-mile (6.8 km) loop begins at I-40 exit 121 on the west end of town and proceeds northward passing over the former SR 66, a local road still signed as a state route that is a former alignment of US 66. The loop then takes a semicircular path near the Seligman Airport returning to Historic US 66, where the loop turns east through town. At the eastern edge of town, the loop turns south returning to I-40 at exit 123.^[3]:418[8]

Major intersections

The entire route is in Seligman, Yavapai County.

mi[3]:418	km	Destinations	Notes
0.00	0.00	I-40 – Los Angeles, Flagstaff	Western terminus; I-40 exit 121
1.16	1.87	To SR 66 west (Historic US 66)
4.25	6.84	I-40 – Los Angeles, Flagstaff	Eastern terminus; I-40 exit 123
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Ash Fork

State Business Route 40(2)
Location:	Ash Fork
Length:	1.49 mi[7]:545 (2.40 km)
Existed:	1989–present[7]:545

State Business Route 40(2) is a business loop of I-40 through Ash Fork in Yavapai County. The 1.5-mile (2.4 km) loop begins at I-40 exit 145 and proceeds to the northeast along the western edge of town. The loop passes through town as a divided route with eastbound traffic following Park Avenue and westbound traffic routed along Lewis Avenue. The roadways combine on the east end of town, and the loop returns south terminating at I-40 exit 146. The roadway continues south beyond I-40 as SR 89.^{[3]:419–420[9]}

Major intersections

The entire route is in Ash Fork, Yavapai County.

mi[3]:419–420	km	Destinations	Notes
0.00	0.00	I-40 – Los Angeles, Flagstaff	Western terminus; I-40 exit 145
1.49	2.40	I-40 / SR 89 south – Los Angeles, Flagstaff, Prescott	Eastern terminus; I-40 exit 146
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Flagstaff

I-40 has both a current route traversing the city of Flagstaff in Coconino County and a former route previously on the city's east side.

Current route

State Business Route 40(4)
Location:	Flagstaff
Length:	9.67 mi (15.56 km)
Existed:	1988–present[10]:626

State Business Route 40(4) is a business loop of I-40 through Flagstaff in Coconino County. The 6.7-mile (10.8 km) loop begins at I-40 exit 191 west of Flagstaff and enters the city following the former route of US 66. In central Flagstaff, the loop intersects SR 89A at Milton Road. The loop turns north and follows Milton Rd. and then turns east along the street known as Route 66 (formerly Santa Fe Avenue) before intersecting US 180 at Humphreys Street. The loop continues to the east side of Flagstaff, where Rte. 66 diverges carrying the former alignment of I-40 BL, before intersecting US 89. From this intersection, the loop turns southward along Country Club Drive until terminating at I-40 exit 201.^{[11]:663–667[12]}

Major intersections

The entire route is in Coconino County.

Location	mi[7]	km	Destinations	Notes
​	0.00	0.00	I-40 – Los Angeles, Albuquerque	Western terminus; I-40 exit 191
Flagstaff	4.20	6.76	SR 89A south (Milton Road) to I-17 / I-40 – Sedona, Phoenix
	4.81	7.74	US 180 west (Humphreys Street) – Arizona Snow Bowl, Grand Canyon, Museum of Northern Arizona	West end of US 180 overlap
	9.14	14.71	US 89 north – Page	Former interchange, now an at-grade T-intersection
	9.67	15.56	I-40 / US 180 east – Los Angeles, Albuquerque	Eastern terminus; east end of US 180 overlap; I-40 exit 201; road continues south as Country Club Drive
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

Former route

State Business Route 40(5)
Location:	Flagstaff
Length:	0.87 mi[11]:668[note 1] (1.40 km)
Existed:	2002–2008[10]:627[3]:423

State Business Route 40(5) was a former business loop on the east side of the city of Flagstaff in Coconino County. The 4.6-mile (7.4 km) loop began at the combined route of I-40 BL and US 180 and followed Santa Fe Avenue eastward underpassing the current business route. The loop continued along the former US 66 connecting with I-40 and US 180 at exit 204 for Walnut Canyon Road along the city's eastern edge. The loop was decommissioned in 2008 and returned to the city for maintenance.^{[3]:423[11]:668[13]}

Major intersections

The entire route is in Flagstaff, Coconino County.

mi[11]:668	km	Destinations	Notes
0.00	0.00	I-40 BL / US 180 (Santa Fe Avenue) – Grand Canyon	Western terminus
4.64	7.47	I-40 / US 180 – Los Angeles, Albuquerque	Eastern terminus; I-40 exit 204
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Winslow

Current route

State Spur Route 40
Location:	Winslow
Length:	1.2 mi[7]:557[note 1] (1.9 km)
Existed:	1974–present[10]:638

State Spur Route 40 is a business spur of I-40 located in Navajo County, serving the city of Winslow. The 1.2-mile (1.9 km) spur begins at I-40/US 180 exit 252 and follows Hipkoe Drive south while concurrent with SR 99. At the intersection with 3rd Street, the two highways split; SR 99 heads east, while I-40 BS heads west. After crossing over the BNSF railway, the spur continues for 0.19 miles (310 m), ending just north of the intersection of Cooperstown Road and the county line.^[14]

Major intersections

The entire route is in Navajo County.

Location	mi[7][14]	km	Destinations	Notes
​	0.00	0.00	Winslow Industrial Spur	Continuation beyond western terminus
​	0.18	0.29	Bridge over BNSF railway
Winslow	1.01	1.63	SR 99 south to SR 87 (3rd Street) – Payson	West end of SR 99 concurrency
	1.2	1.9	SR 99 north / I-40 (US 180) – Flagstaff, Albuquerque	Eastern terminus; east end of SR 99 concurrency; I-40 exit 252; road continues north as Hipkoe Drive
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

Former route

State Business Route 40(6)
Location:	Winslow
Length:	3.63 mi[15]:690 (5.84 km)
Existed:	1968–2007[10]:630[11]:668-669

The former Business Route 40 in Winslow ran along former US 66 from exits 252 to exit 255.

Joseph City

State Business Route 40(7)
Location:	Joseph City
Length:	2.83 mi[7]:550 (4.55 km)
Existed:	1985–present[7]:550

Business Route 40 in Joseph City runs along former US 66 from exits 274 to exit 277.

Holbrook

State Business Route 40(8)
Location:	Holbrook
Length:	5.10 mi[7]:553 (8.21 km)
Existed:	1996–present[7]:553

Business Route 40 in Holbrook runs along part of current U.S. Route 180 in Arizona and former US 66 as well as Arizona State Route 77 from exits 285 to exit 289.

New Mexico

All of the business loops within New Mexico are maintained by the New Mexico Department of Transportation (NMDOT). In New Mexico, Interstate business routes are named independently of their parent Interstate's designation with business loops of Interstate 25 (I-25) numbered between 10–19, those of I-10 between 20–29, and those of I-40 between 30–39. New Mexico business loop numbers ascend eastward and northward with gaps in numbering to allow for future designations. Within New Mexico, I-40 currently has business routes in Moriarty, Santa Rosa and Tucumcari.

Moriarty

Business Loop 34
Location:	Moriarty
Length:	2.922 mi[16]:3 (4.703 km)

Business Route 40 in Moriarty, New Mexico runs along part of former US 66 from a trumpet interchange at exit 194 to a flyover interchange with an additional east-to-west ramp at exit 197.

Santa Rosa

Business Loop 35
Location:	Santa Rosa
Length:	4.367 mi[16]:4 (7.028 km)

Business Route 40 in Santa Rosa runs along former US 66 from exits 273 to exit 277. It also overlaps part of U.S. Route 54 and all of U.S. Route 84.

Tucumcari

Business Loop 36
Location:	Tucumcari
Length:	7.652 mi[16]:4 (12.315 km)

Business Route 40 in Tucumcari, New Mexico runs along part of former US 66 from a trumpet interchange at exit 329 to a diamond interchange at exit 335.

Texas

All of the business loops within Texas are maintained by the Texas Department of Transportation (TxDOT). Interstate 40 has seven business loops in the state, each located in the Panhandle region. Along I-40, TxDOT identifies each business route as Business Interstate 40 followed by an alphabetic suffix. Along Texas Interstates, the alphabetic suffixes on business route names ascend eastward and northward. There are gaps in the alphabetic values to allow for future system expansion. The alphabetic naming suffixes are included as small letters on the bottom of reassurance shields.

Glenrio

Business Interstate 40-A
Location:	Glenrio
Length:	0.779 mi[17] (1.254 km)
Existed:	1990–present[17]

The Glenrio business spur of Interstate 40 begins at I-40 on exit 0 just east of the New Mexico-Texas state line. The highway runs south from the interchange towards Former route 66, then turns west along that decommissioned route where it terminates at the Texas-New Mexico State Line.

Adrian

Business Interstate 40-B
Location:	Adrian
Length:	2.369 mi[18] (3.813 km)
Existed:	1990–present[18]

The Adrian business loop of Interstate 40 begins at I-40 at exit 22 and runs along Former route 66 to exit 23.

Vega

Business Interstate 40-C
Location:	Vega
Length:	3.395 mi[19] (5.464 km)
Existed:	1990–present[19]

The Vega business loop of Interstate 40 runs along Former route 66 between two modified trumpet interchanges at exits 35 and 37.

Amarillo

Business Interstate 40-D
Location:	Amarillo
Length:	14.125 mi[20][nb 1] (22.732 km)
Existed:	1990–present[20]

The Amarillo business loop of Interstate 40 begins at I-40 exit 62A just west of Amarillo. The highway was formerly a business route for Route 66, being that highway's only bannered route in Texas. Bus. I-40 D is known locally as Amarillo Boulevard and is the longest bannered route of Interstate 40.

Route description

Bus. I-40 D begins at Interstate 40 exit 62A just west of Amarillo near Cadillac Ranch. The highway runs east through a low developed area before entering the Amarillo city limits just before an intersection with Loop 335 (Soncy Road). Bus. I-40 D turns northeast at an interchange with Coulter Street/Wolffin Avenue before briefly running north at an interchange with SW 9th Avenue/Bell Street (near the main campus of Amarillo College). The highway starts turning northeast at Tascosa Road/Gem Lake Road before running straight east at the N. Western Street interchange. After this interchange, Bus. I-40 D begins to travel through a heavily developed area of the city before meeting U.S. Route 60/U.S. Route 87/U.S. Route 287 just north of downtown and begins an overlap with U.S. Route 60. The two highways continue to travel through a heavily developed area of the city, with the development becoming more sparse after the State Highway 136 intersection. Bus. I-40 D becomes a divided highway after an interchange with Loop 335 (Lakeside Drive) and runs along the northern border of Rick Husband Amarillo International Airport. Just after leaving the Amarillo city limits, U.S. Route 60 leaves the highway and Bus. I-40 D starts to run southeast. Bus. I-40 D meets its eastern terminus at I-40 exit 85.

Junction list

County	Location	mi[21]	km	Destinations	Notes
Potter	​	0.0	0.0	I-40 / Hope Road	Interchange; westbound exit and eastbound entrance; I-40 exit 62A
	Amarillo	2.1	3.4	Loop 335 (Soncy Road)
		2.8	4.5	Coulter Street, Wolffin Avenue	Interchange
		4.3	6.9	SW 9th Avenue (Loop 279 east)/Bell Avenue	Interchange
		5.0	8.0	RM 1061 north (Tascosa Road) / Gem Lake Road
		6.2	10.0	FM 1719 north (Western Street)	Interchange
		9.2	14.8	US 60 west / US 87 / US 287 (Taylor Street, Fillmore Street, Pierce Street, Buchanan Street) – Dumas, Canyon	West end of US 60 overlap
		11.4	18.3	Lake Street	Interchange
		12.1	19.5	SH 136 north (Panhandle Boulevard) – Borger
		14.4	23.2	Loop 335 (Lakeside Road) – Rick Husband Amarillo International Airport	Interchange
		17.6	28.3	B Avenue – Amarillo College East Campus	Interchange
		19.8	31.9	FM 1912 (Masterson Road)	Interchange
	​	20.3	32.7	US 60 east – Panhandle	East end of US 60 overlap
Carson	​	24.4	39.3	I-40 / FM 2575 west	Interchange; eastbound exit and westbound entrance; I-40 exit 85
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

Groom

Business Interstate 40-F
Location:	Groom
Length:	3.533 mi[22] (5.686 km)
Existed:	1990–present[22]

The Groom business loop of Interstate 40 begins at I-40 at exit 110 and runs along Former route 66 to exit 114.

McLean

Business Interstate 40-H
Location:	McLean
Length:	3.796 mi[23] (6.109 km)
Existed:	1990–present[23]

The McLean business loop of Interstate 40 runs from exit 141 to 143. It begins at I-40 at an eastbound flyover interchange and runs northeast along Former route 66. Before the intersection with 26th 1/2 Road, it curves to the southeast. After the intersection with Texas Highway 273, it splits into a one way pair with eastbound BL-40 H continuing along Railroad Street, and westbound BL-40 H moving onto First Street, one block to the north. This one-way pair comes to an end just at the intersection with a connecting road that brings Eastbound BL-40-H traffic under I-40 and then loops back from the south I-40 frontage road to end at I-40.

Shamrock

Business Interstate 40-J
Location:	Shamrock
Length:	2.77 mi[24] (4.46 km)
Existed:	1993–present[24]

The Shamrock business loop of Interstate 40 is the last business route of I-40 in Texas, running from exit 160 to exit 164, along historic US 66.

Oklahoma

Erick

Interstate 40 Business
Location:	Erick

The Erick business loop of Interstate 40 is the first business route of I-40 in Oklahoma. It begins on exit 5 (Honeyfarm Drive) and runs south into North 1720th Road until that street ends at a four-lane divided highway known as East 1240th Road (former Route 66), where it turns east. The next intersection is Oklahoma State Highway 30, which overlaps Bus. I-40 from that point on. BL-40/OK 30 ends as a divided highway at Williams Street, and becomes Roger Miller Boulevard as it enters downtown Erick. The overlap with SH-30 ends at Sheb Wooley Avenue when SH-30 itself turns north. BL-40 becomes a divided highway again east of North 1750th Road, and continues east until the intersection with a dirt road named North 1770th Road, where it curves to the northeast. BL-40 finally ends at a folded-diamond interchange with I-40, known as exit 11.

Sayre

Interstate 40 Business
Location:	Sayre

The Sayre business loop of Interstate 40 is the second business route of I-40 in Oklahoma. It runs north from exit 20 overlapping much of U.S. Route 283 until leaving that overlap across from the intersection with West Sayre Avenue. From there it runs east-northeast until it reaches a diamond interchange with I-40 at exit 25. Beyond exit 25, the road continues as a jughandle frontage road leading to East 1170th Road.

Elk City

Interstate 40 Business
Location:	Elk City

The Elk City business loop of Interstate 40 is the third business route of I-40 in Oklahoma. It runs northeast along former US 66 from eastbound exit 32 and turns east after the beginning of an overlap with OK 6 that runs along the route until OK 6 turns south at North Main Street. From there it snakes through the northeastern part of the city and after the intersection with OK 34 finally terminates with I-40 at westbound exit 41.

Route description

The route begins at a left exit in a wye interchange with Interstate 40, which also serves as a connection to southbound Oklahoma State Highway 34. The first intersection along this route is BK 29, which leads to OK 34, and was the west end of an overlap with OK 34 until 1987. The road continues to run northeast, then after encountering an intersection with OK 6, which joins BL-40 in a concurrency, it turns straight east. Just after James Way, the divided highway is replaced by a four lane undivided boulevard with center left turn provisions, and the road approaches the National Route 66 Museum. As the road approaches downtown Elk City, OK 6 turns south at the intersection with North Main Street.

Crossing a bridge over a tributary to Elk Creek, BL-40 makes a sharp curve to the left and heads north at Third Street. Between BK 35 and Country Club Drive, the road not only turns to the east again, but also resumes its previous status as a divided highway. Here it also passes by the Elk City Regional Business Airport. The approach to the intersection with OK 34 is a sign of the beginning of the end for BL-40, because south of this intersection is an approach to a westbound on-eastbound off wye interchange with I-40. Immediately after this intersection, BL-40 ends at an eastbound on-westbound off wye interchange with I-40.

Major intersections

The entire route is in Beckham County.

Location	mi	km	Destinations	Notes
​	0.00	0.00	I-40	Western terminus; I-40 exit 32
Elk City			To SH-34	Former west end of OK 34 overlap
			SH-6 west (BKR)	West end of OK 6 overlap
			SH-6 east (North Main Street)	East end of OK 6 overlap
			SH-34 to I-40 west	South to EB exit 41 on I-40
			I-40 east	Eastern terminus; I-40 WB exit 41
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

Clinton

Interstate 40 Business
Location:	Clinton

The Clinton business loop of Interstate 40 is the fourth business route of I-40 in Oklahoma, running from exit 65 to exit 69, along former US 66.

Weatherford

Interstate 40 Business
Location:	Weatherford

The Weatherford business loop of Interstate 40 is the fifth business route of I-40 in Oklahoma, running from exit 80A to exit 82, along former US 66, and Main Street.

El Reno

Interstate 40 Business
Location:	El Reno

The El Reno business loop of Interstate 40 is the sixth business route of I-40 in Oklahoma, running from exit 119 to exit 125, along former US 66, as well as part of US 81.

Henryetta

Interstate 40 Business
Location:	Henryetta

The Henryetta business loop of Interstate 40 is the seventh business route of I-40 in Oklahoma, running from exit 237 to exit 240, along former US Business Routes 62 and 75, as well as part of US 62-75. It is the first business route along I-40 in the state that's not a former segment of US 66.

Sallisaw

Interstate 40 Business
Location:	Sallisaw

The Sallisaw business loop of Interstate 40 is the last business route of I-40 in Oklahoma, running from exit 308 (US 59) to exit 311 (US 64).

North Carolina

See also

U.S. Roads portal

Notes

References