Editing U.S. Route 66 (section)

===After decertification===
[[File:Sidewalk Highway (3).jpg|thumb|"Sidewalk highway" section of US&nbsp;66 near [[Miami, Oklahoma]]]]

When the highway was decommissioned, sections of the road were disposed of in various ways. Within many cities, the route became a "business loop" for the interstate. Some sections became state roads, local roads, or private drives, or were abandoned completely. Although it is no longer possible to drive US&nbsp;66 uninterrupted all the way from Chicago to Los Angeles, much of the original route and alternate alignments are still drivable with careful planning. Some stretches are quite well preserved, including one between Springfield, Missouri, and Tulsa, Oklahoma. Some sections of US&nbsp;66 still retain their historic {{convert|9|ft|m|adj=mid|-wide}} "sidewalk highway" form,<ref>{{Cite web |title=Route&nbsp;66 Sidewalk Highway |url=http://www.atlasobscura.com/places/route-66-sidewalk-highway |url-status=live |archive-url=https://web.archive.org/web/20170828061853/http://www.atlasobscura.com/places/route-66-sidewalk-highway |archive-date=August 28, 2017 |access-date=August 26, 2017 |website=Atlas Obscura}}</ref> never having been resurfaced to make them into full-width highways. These old sections have a single, paved lane, concrete curbs to mark the edge of the lane, and gravel shoulders for passing.

Some states have kept the 66 designation for parts of the highway, albeit as state roads. In Missouri, Routes [[Route 366 (Missouri)|366]], [[Route 266 (Missouri)|266]], and [[Route&nbsp;66 (Missouri)|66]] are all original sections of the highway. [[State Highway 66 (Oklahoma)|State Highway 66]] (SH-66) in Oklahoma remains as the [[Shunpiking|alternate "free" route]] near its turnpikes. "Historic Route&nbsp;66" runs for a significant distance in and near [[Flagstaff, Arizona]]. Farther west, a long segment of US&nbsp;66 in Arizona runs significantly north of I-40, and much of it is designated as [[Arizona State Route 66|State Route&nbsp;66]] (SR&nbsp;66). This runs from [[Seligman, Arizona|Seligman]] to [[Kingman, Arizona]], via [[Peach Springs]]. A surface street stretch between [[San Bernardino, California|San Bernardino]] and [[La Verne, California|La Verne]] (known as [[Foothill Boulevard (Los Angeles)|Foothill Boulevard]]) to the east of [[Los Angeles]] retains its number as [[State Route&nbsp;66 (California)|SR&nbsp;66]]. Several county roads and city streets at various places along the old route have also retained the "66" number.