Interstate business routes are roads connecting a central or commercial district of a city or town with an Interstate highway, Interstate bypass. These roads typically follow along local streets often along a former United States Numbered Highways, U.S. Route or state highway that had been replaced by an Interstate. Interstate business route reassurance markers are signed as either Loop route, loops or Spur route, spurs using a green Highway shield, shield shaped sign and numbered like the shield of the parent Interstate highway. Along Interstate 25 (I-25), business routes are found in all three states through which I-25 passes: New Mexico, Colorado, and Wyoming. 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. Every state along I-25 regards its business routes as fully incorporated members of their respective state maintained highway systems. 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.

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 in New Mexico, I-25 numbered between 10–19, those of Interstate 10 (New Mexico), I-10 between 20–29, and those of Interstate 40 (New Mexico), I-40 between 30–39. New Mexico business loop numbers ascend eastward and northward with gaps in numbering to allow for future designations. I-25 begins with a business route through Williamsburg, New Mexico, Williamsburg and Truth or Consequences, New Mexico, Truth or Consequences before proceeding northward with additional routes serving the towns of Socorro, New Mexico, Socorro, Belen, New Mexico, Belen, Las Vegas, New Mexico, Las Vegas, Springer, New Mexico, Springer, and Raton, New Mexico, Raton. These routes largely conform to the current or former alignment of the unsigned U.S. Route 85 in New Mexico, U.S. Route 85 (US 85) through these communities before the construction of I-25. NMDOT has decommissioned US 85 throughout the state and no longer signs the highway along its length, as US 85 entirely follows I-25 with the single exception of the business loop in Las Vegas. The American Association of State Highway and Transportation Officials (AASHTO), however, continues to recognize the New Mexico portion of US 85 maintaining continuity with sections in adjacent states.

Williamsburg–Truth or Consequences

Business Loop 11 (BL 11) is a business loop serving the cities of Williamsburg and Truth or Consequences in Sierra County, New Mexico, Sierra County. The loop begins at exit 75 of I-25 in Williamsburg, intersecting New Mexico State Road 187, State Road 187 (NM 187), traveling northeast on Broadway Street through Truth or Consequences until meeting Main Avenue. Between that point and Date Street, the route follows two One-way traffic, oneway roads with Broadway carrying northbound traffic and Main conveying traffic to the south. The routes combine and turn north on Date, intersecting the western terminus of NM 51. Turning northwest, the highway intersects NM 181 and terminates at exit 79 on I-25 on the northside of Truth or Consequences. Most of the loop, with the exception of its I-25 interchanges, was previously part of US 85, which joined the route from the south at NM 187 and departed to the north along NM 181. ;Major intersections

Socorro

Business Loop 12 (BL 12) is a business loop serving the city of Socorro, New Mexico, Socorro in Socorro County, New Mexico, Socorro County. The loop begins at exit 147 of I-25 and travels northwest along California Avenue until an Intersection (road), intersection with the northern terminus of NM 1. The loop turns north as a divided highway as it enters the city. U.S. Route 60 in New Mexico, US 60 intersects from the west, and the loop becomes concurrency (road), concurrent with US 60 as the pair of highways continue to the north. The loop terminates at exit 150 on I-25, and US 60 continues along the Interstate as it exits Socorro. ;Major intersections

Belen

Business Loop 13 (BL 13) is a business loop serving the city of Belen in Valencia County, New Mexico, Valencia County. The loop begins at exit 190 on I-25 and intersects the northern terminus of NM 116 as the highway travels north along Main Street into the city. The western terminus of NM 309 is met in central Belen. The loop continues north to NM 314 then turns northwest before terminating at exit 195 on I-25. ;Major intersections

Santa Fe

Business Loop 14 (BL 14) was a business loop that served Santa Fe, New Mexico, Santa Fe in Santa Fe County, New Mexico, Santa Fe County. The loop began at exit 278 on I-25 and traveled northeast along NM 14 (Cerrillos Road). It then went east on NM 466 (Saint Michaels Drive), cutting through the southside of Santa Fe. The road ended up as Old Pecos Trail and remained so until reaching I-25 again and terminating at exit 284. The route was decommissioned. Major intersections

Las Vegas

Business Loop 15 (BL 15) is a business loop serving Las Vegas in San Miguel County, New Mexico, San Miguel County. The loop begins at exit 343 of and travels northeast, intersecting NM 329. The loop continues north, passing to the west of the Las Vegas station (New Mexico), Las Vegas Intermodal Facility served by the Southwest Chief line of Amtrak, just south of the intersection with NM 104. Continuing north, the highway passes east of Municipal Park before terminating at NM 250 and I-25 at exit 347. ;Major intersections

Springer

Business Loop 16 (BL 16) is an unsigned business loop serving the city of Springer in Colfax County, New Mexico, Colfax County. The loop begins at exit 412 of I-25 and travels northeast along Railroad Avenue. The loop serves as the main north–south road in the town and intersects Fourth Street, which, to the west of the loop is NM 21 and, to the east is U.S. Route 56 in New Mexico, US 56 and U.S. Route 412 in New Mexico, US 412. Continuing northwest, the loop intersects NM 468 and then runs closely parallel to the Interstate before merging at exit 414. ;Major intersections

Raton

Business Loop 17 (BL 17) is a business loop that begins at exit 450 on I-25 south of Raton in Colfax County concurrent with U.S. Route 64 in New Mexico, US 64. The two highways intersect NM 555 then pass east of La Mesa Park, traveling along Second Street north into the city. Clayton Road takes US 64 off of the loop to the east as the loop continues north, crossing over the rail line that serves the Raton (Amtrak station), Raton Amtrak Station before turning northwest and terminating at exit 454 on I-25. ;Major intersections

Colorado

All Interstate business routes in Colorado are maintained by the Colorado Department of Transportation (CDOT). Within Colorado, all highways maintained by the state are classified as state highways, including Interstates and U.S. Highways which hold the same numerical designations as their nationally established routes. The numerical values of all state highway names are followed by an alphabetic suffix, although this convention is used by the department internally and not reflected in route signage. Hence, the mainline of Interstate 25 in Colorado, I-25 throughout the length of the state is classified as State Highway 25A while its two business routes in Aguilar, Colorado, Aguilar and Walsenburg, Colorado, Walsenburg are internally named State Highway 25B and State Highway 25C, respectively. U.S. Route 85 in Colorado, US 85 and U.S. Route 87 in Colorado, US 87 are hidden routes not recognized nor signed by CDOT in southern Colorado. They are, however, established AASHTO routes maintaining continuity with signed portions in other states along their routes. In southern Colorado, the routes primarily follow I-25, including at Aguilar, but with deviations, such as along the Walsenburg business route. In addition to these, U.S. Route 160 in Colorado, US 160 joins I-25 at Walsenburg and follows concurrently with the Interstate to Trinidad, Colorado, Trinidad, including the portion bypassing Aguilar. Thus, in Walsenburg, US 160 crosses the business route in the town center and again at the business route's southern terminus.

Trinidad

State Highway 25A (SH 25A) was a business route of I-25 that connected Trinidad in Las Animas County, Colorado, Las Animas County to the Interstate. The route began as Animas Street, coming from University Street at a diamond interchange at exit 13 on I-25. The route was concurrent with U.S. Route 160 in Colorado, US 160 along Main Street. The route turned southwest on Main Street and terminated at I-25. In 2009, a reconstruction project involved a replacement of the northbound viaduct crossing the Purgatoire River and more reconstruction in 2011, adding a new diamond interchange at Main Street and I-25 and replacing the antiquated ramps at Animas Street and University Street, which ultimately eliminated the route. ;Major intersections

Aguilar

State Highway 25B (SH 25B) is a business spur of I-25 connecting the town of Aguilar in Las Animas County, Colorado, Las Animas County to the Interstate. The route begins at the corner of Main Street and Fir Street in Aguilar. The spur proceeds for one block north along North Fir Street before turning to the northwest along Lynn Road away from town. The route turns east along County Road 60 immediately before terminating at I-25 exit 34. ;Major intersections

Walsenburg

State Highway 25C (SH 25C) is a business loop of I-25 serving the town of Walsenburg in Huerfano County, Colorado, Huerfano County. The route begins at I-25 exit 49 and proceeds to the west along the southern edge of Walsenburg. The route then turns to the northwest along Walsen Avenue. At Seventh Street, US 160 intersects from the west US 160 runs concurrently with the loop until US 160 turns off to the east along Fifth Street to I-25. The loop then continues northeast along Walsen Avenue, leaving town, and intersects Colorado State Highway 69, SH 69 before terminating at I-25 exit 52. CDOT does not recognize or sign US 85 in the southernmost part of its route within the state, nor does it recognize US 87 anywhere within Colorado, as they are redundant with other routes in the state highway system. The highways remain established by AASHTO primarily along I-25 in southern Colorado and along Walsenburg's I-25 business route. ;Major intersections

Colorado Springs

State Highway 25 Business (SH 25 Bus.) was a business loop of I-25 that served downtown Colorado Springs, Colorado, Colorado Springs and Northeast Colorado Springs. The route started at exit 140 on I-25 and ran along with Nevada Avenue. This route was also part of the CanAm Highway. It was a four-lane divided street that took a straight shot through downtown going north. The route terminated at exit 148 at I-25. In 2007, actions were taken to decommission the route, along with Colorado State Highway 38 (pre-2007), SH 38 and portions of Colorado State Highway 83, SH 83, in an effort to add the alignment of Colorado State Highway 21, SH 21 (Powers Boulevard). Major intersections

Castle Rock

State Highway 25 Business (SH 25 Bus.) was a business loop that served the westside of Castle Rock, Colorado, Castle Rock. The route began at exit 181 as Plum Creek Pkwy and headed northwest. It then turned northeast on County Road 46 (Wolfensburger Road), heading back to the Interstate, and then terminated at exit 182 as Wilcox Street. The route was decommissioned in 1996 and was likely unsigned. Major intersections

Wyoming

All business routes of Interstate 25 in Wyoming, I-25 within Wyoming are maintained by the Wyoming Department of Transportation (WyDOT). Wyoming has no naming convention for disambiguation between different business routes with all designated simply as I-25 Business (I-25 Bus.) along the Interstate. I-25 has seven business routes within the state. Road concurrences are frequent in Wyoming, and the seven business highways often overlay multiple other highways, including U.S. Highway 87 Business (US 87 Bus.), wholly or partly at most of these seven locations, as U.S. Route 87 in Wyoming, US 87 largely follows I-25 throughout the state.

Cheyenne

Interstate 25 Business (I-25 Bus.) and U.S. Highway 87 Business (US 87 Bus.) are business loops serving the city of Cheyenne in Laramie County, Wyoming, Laramie County. The multiplexed highway begins at exit 7 of I-25/US 87 and is routed along Wyoming Highway 212 (WYO 212) and named College Drive. At just over , U.S. Route 85 in Wyoming, US 85 is intersected. Here, I-25 Bus. leaves WYO 212, turns north onto US 85, and remains paired with it until its end. I-25 Bus./US 85/US 87 Bus. enter Cheyenne from the south and intersect Interstate 80 (Wyoming), I-80 at exit 362. At this point, Interstate 180 (Wyoming), I-180 begins. Despite the Interstate designation, the I-180 portion is not a freeway. The I-180 concurrency only lasts for just over as I-180 ends at Interstate 80 Business (Cheyenne, Wyoming), I-80 Bus./U.S. Route 30 in Wyoming, US 30 along Lincolnway. I-25 Bus. continues north with US 85 and US 87 Bus. now as a One-way pair, oneway couplet through central Cheyenne northbound as Warren Avenue and southbound as Central Avenue. Near the Cheyenne Regional Airport, the oneway streets combine and continue as Central Avenue before intersecting the southern terminus of WYO 219 at Yellowstone Road. I-25 Bus. and US 87 Bus. terminate at exit 12 of I-25/US 87. Here, US 85 joins those routes northbound. ;Major intersections

Chugwater

Interstate 25 Business (I-25 Bus.) is a business route signed as Wyoming Highway 321 (WYO 321) and serving the town of Chugwater, Wyoming, Chugwater in southeastern Platte County, Wyoming. The highway begins at exit 54 of Interstate 25 (Wyoming), I-25/U.S. Route 87 (Wyoming), US 87. At this interchange lies the northern terminus of WYO 211. Here, I-25 Bus. travels east past the Chugwater rest area. At is the western terminus of WYO 313. Less than later, I-25 Bus. (WYO 321) reaches I-25/US 87 at exit 57, where they both end. WYO 321 is signed from the freeway as I-25 Bus. and serves as a de facto business route; however, I-25 Bus. is not signed anywhere along WYO 321.WYO 321/I-25 Business - Chugwater
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Wheatland

Interstate 25 Business (I-25 Bus.) and U.S. Highway 87 Business (US 87 Bus.) are concurrent business loops serving the town of Wheatland, Wyoming, Wheatland in central Platte County, Wyoming. I-25 Bus./US 87 Bus. begin at exit 78 of Interstate 25 (Wyoming), I-25/U.S. Route 87 (Wyoming), US 87. Here, I-25 Bus./US 87 Bus. begin on a short section of Mariposa Pkwy but then turn north onto South Wheatland Highway for . WYO 310 and WYO 312 are then intersected as the business routes turn east along South Street. The business routes turn north later onto 9th Street and intersect WYO 316 (Gilchrist Street) shortly after. Further north, the southern terminus of WYO 320 is intersected as the business loops become South Swanson Road. At , I-25 Bus./US 87 Bus. meet I-25/US 87 at exit 80 where they end. Major intersections

Douglas

Interstate 25 Business (I-25 Bus.), U.S. Highway 20 Business (US 20 Bus.), U.S. Highway 26 Business (US 26 Bus.), and U.S. Highway 87 Business (US 87 Bus.) are concurrent business loops serving the town of Douglas in southern Converse County, Wyoming, Converse County. I-25 Bus./US 20 Bus./US 26 Bus./US 87 Bus. begin at exit 135 of I-25/U.S. Route 20 in Wyoming, US 20/U.S. Route 26 in Wyoming, US 26/U.S. Route 87 in Wyoming, US 87 southeast of Douglas. The loops follow East Richards Street into Douglas. At South 4th Street, the loops turn north through Douglas. The loops turn west onto Center Street later, which becomes Yellowstone Highway. Near their end, the northern terminus of WYO 94 and the southern terminus of WYO 59 are intersected at Riverbend Drive. Past that intersection, the business routes rejoin I-25/US 20/US 26/US 87 at exit 140. Douglas Yellowstone hw

;Major intersections

Glenrock

Interstate 25 Business (I-25 Bus.) is a business route serving the town of Glenrock, Wyoming, Glenrock in Converse County, Wyoming. I-25 Bus. begins at exit 165 of Interstate 25 (Wyoming), I-25. The business route travels north, concurrency (road), concurrent with WYO 95, into Glenrock on Deer Creek Road and then South 4th Street. At approximately , I-25 Bus./WYO 95 intersect U.S. Route 20, US 20/U.S. Route 26, US 26/U.S. Route 87, US 87. Here, I-25 Bus. turns east onto Birch Street to travel with US 20/US 26/US 87 for the remainder of its route, while WYO 95 turns west onto Birch Street. I-25 Bus. continues east out of Glenrock, intersecting the northern terminus of WYO 90 (Boxelder Road), before reaching its eastern end at exit 160 of I-25. US 20/US 26/US 87 join eastbound I-25.
I-25 Business - GlenrockI-25 Bus - I-25/WYO 95 to US 20/US 26/US 87/WYO 95I-25 Bus - WYO 95 to WYO 90I-25 Bus - WYO 90 to I-25/US 20/US 26/US 87
/ref> Major intersections

Casper

Interstate 25 Business (I-25 Bus.) is a business loop serving the city of Casper in eastern Natrona County, Wyoming, Natrona County. The loop begins at exit 188A of I-25, heading south on Center Street along with Special routes of U.S. Route 20#Casper business loop, US 20 Bus. and unsigned WYO 255. The loop turns left onto 1st Street, where it joins US 20 Bus. and US 26 Bus. WYO 251 intersects the loop from the south along Wolcott and Durbin streets before US 20/US 26/US 87 depart on Yellowstone Highway and their respective business routes end. There, I-25 Bus. turns north along Bryan Stock Trail, where eastbound US 20/US 26 and southbound US 87 are concurrent with I-25 Bus. westbound. The loop ends at exit 186 of I-25. ;Major intersections

Buffalo

Interstate 25 Business (I-25 Bus.) is a business spur serving the city of Buffalo in Johnson County, Wyoming, Johnson County that runs concurrently with U.S. Route 87 Business (Buffalo, Wyoming), US 87 Bus. The spur begins at exit 298 of I-25/US 87 south of Buffalo. I-25 Bus. intersects WYO 196 into its route as it follows Main Street into Buffalo. U.S. Route 16 in Wyoming, US 16 joins the spur at Fort Street later. US 16 has a short concurrency with the spur until Hart Street, where it turns east along Interstate 90 Business (Buffalo, Wyoming), I-90 Bus. where I-25 Bus. terminates. I-90 Bus. approaches the intersection from the north along the northern extension of US 87 Bus. ;Major intersections

References

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External links

Interstate 25 in Wyoming
AARoads
Interstate Highways, Wyoming Routes
Corco Highways Business Interstate Highways, 25 Interstate 25 Transportation in Huerfano County, Colorado Transportation in Las Animas County, Colorado Transportation in Colfax County, New Mexico Transportation in San Miguel County, New Mexico Transportation in Sierra County, New Mexico Transportation in Socorro County, New Mexico Transportation in Valencia County, New Mexico Transportation in Converse County, Wyoming Transportation in Johnson County, Wyoming Transportation in Laramie County, Wyoming Transportation in Natrona County, Wyoming