New Mexico State Road 423
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| Paseo del Norte | ||||
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| Maintained by NMDOT | ||||
| Length: | 17.000 mi (27.359 km) | |||
| Major junctions | ||||
| West end: |
 NM 45 in Albuquerque
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  I-25 / US 85 in Albuquerque |
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| East end: |
 NM 556 in Albuquerque |
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| Location | ||||
| Counties: | Bernalillo | |||
| Highway system | ||||
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New Mexico State Road 423 is a 17.0 mi (27.4 km) long state highway entirely within Bernalillo County, New Mexico. For its entire length, NM-423 is signed as Paseo del Norte in Albuquerque.
The highway's western terminus is at NM-45 (signed as Coors Blvd). The highway then proceeds east intersecting several state highways, and Interstate 25. The highway's eastern terminus is at an intersection with New Mexico State Road 556.
From NM-45 to Interstate 25, NM-423 is a freeway with a 60 miles per hour (97 km/h) speed limit. From I-25 to its eastern terminus at NM-556, NM-423 is a 6-lane divided highway with at-grade intersections with speed limits of 45-55 MPH. Initial proposals to reconstruct its interchange with I-25 would have also extended the freeway portion of NM-423 east from Jefferson Boulevard east to Louisiana Boulevard. The scaled back design added two flyover ramps to provide high-speed nonstop access between I-25 northbound and NM-423 westbound and also NM-423 eastbound and I-25 southbound. The signalized intersections with the I-25 frontage roads remain in place, the same with at-grade intersections with San Pedro Road and Louisiana Boulevard (to the east of I-25).
The New Mexico Department of Transportation (NMDOT) approved a construction design at a cost of US$93 million, US$55 million of which comes from Bernalillo County and the City of Albuquerque, US$29.75 million from the State of New Mexico, and the other US$8.25 million from federal funding. Funding was approved in November 2012; construction began in October 2013, and was completed in December 2014. The completed interchange allowed for unimpeded access on Paseo from I-25 all the way to Golf Course Road, reducing travel times and congestion for the West Side areas and Rio Rancho.
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