The later, and more popular, alignment, continued straight west to Albuquerque, becoming Central Avenue through the city. While the former US 66 through Albuquerque is now owned and maintained by the city of Albuquerque, a few US-66/BUSINESS I-40 signs remain along Central Avenue in the downtown area. East of Albuquerque, US 66 is now NM 333 all the way to Moriarty. A stretch of NM 333 in Tijeras is a musical road, with rumble strips that play "America the Beautiful". I-40 east of Moriarty to Santa Rosa was built by adding a second set of lanes to US 66. East of Santa Rosa, US 66 is now largely frontage roads for I-40 or business loops for Santa Rosa and Tucumcari. At San Jon, the original alignment (now gravel) continues to the Texas state line at the historic ghost town of Glenrio. A later alignment is the north frontage road for I-40.