costs and low traffic volumes. Old US 66 (current Bus. I-40-A) through Glenrio was bypassed in 1973 by I-40. Bus. I-40-B (formerly Loop 550) is a business loop through Adrian. The road was bypassed c. 1969 by I-40 and carried US 66 until its 1985 decommissioning. Bus. I-40-C (formerly Loop 551) is a business loop through Vega. The road was bypassed c. 1973 by I-40 and carried US 66 until its 1985 decommissioning. Bus. I-40-D (formerly Loop 552) is a long business loop through Amarillo. An older alignment—Loop 279—carried Business U.S. Highway 66 (Bus. US 66). East of Amarillo, Farm to Market Road 2575 (FM 2575) is old US 66, rerouted to today's Bus. I-40-D in 1958 by the construction of Amarillo International Airport. Present Bus. I-40-D was bypassed in 1968 by I-40 and carried US 66 until its 1985 decommissioning. FM 2161 and SH 207 carry old US 66 through Conway. The road was bypassed c. 1966 by I-40 and carried US 66 until its 1985 decommissioning. Bus. I-40-F (formerly Loop 554) is a business loop through Groom. The road was bypassed c. 1980 by I-40 and carried US 66 until its 1985 decommissioning. The short Loop 271, in addition to providing access to FM 291, is old US 66 through Alanreed. The road was bypassed in 1953 by US 66, but the bypass was not upgraded to a freeway until c. 1982. Bus. I-40-H (formerly Loop 555) is a business loop through McLean. The road was bypassed c. 1984 by I-40 and carried US 66 until its 1985 decommissioning. Bus. I-40-J (formerly Loop 556) is a business loop through Shamrock. The road was bypassed c. 1973 by I-40 and carried US 66 until its 1985 decommissioning. Spur 30 is a short route from I-40 just west of the Oklahoma state line southeast to the border. In Oklahoma, the road is unnumbered though Texola, though it picks up I-40 Bus. at exit 5 to run through Erick. The road was bypassed c. 1972 by I-40 and carried US 66 until 1976 when it was moved onto I-40 in the area. Future In 2015, the Texas Department of Transportation (TxDOT) published the plans for the all new Loop 335 section that will encircle the city of Amarillo. TxDOT has planned multiple multilevel interchanges that intersect with I-40. The first, on the eastside of Amarillo, is a multilevel interchange that will