page_title: Permanently signed detour route
section_title: Ohio
hierarchical_section_title: Permanently signed detour route / United States / Ohio
caption_attribution_description: This is the Southwestern terminus of I-76/US 224 alt, and where I-77 alt transfers from OH 21 to I-76 eastbound
context_page_description: A permanently signed detour route is a type of route which is used temporarily during special circumstances. Various areas have developed these systems as part of incident management. The purpose of these routes is to provide a detour in the event that the parent route is impassable, due to either a traffic jams, traffic collision, or road closure. Sometimes these routes are signed as a prefixed or suffixed numbered road, making them a type of special route.
  A permanently signed detour route should not be confused with a "permanent detour". The latter would be used if a particular roadway section, such as a bridge, were closed permanently.
context_section_description: Ohio has established a permanent detour scenario of Interstate 70 east of Columbus, due to frequent flooding.
  Alternate Interstate routes also exist for I-70 near Dayton as well as for Interstate 76 and Interstate 77 in Summit County.
caption: I-76, I-76/US 224 Alt, and I-77 alt at Ohio State Route 21 in Norton
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