Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
Interstate Highway plan approved June 27, 1958. Originally scanned by Richard Moeur and downloaded from [1]. Base map is from the FHWA with route numbers added by AASHTO. Map published without copyright notice and not registered/renewed in [2]archive copy at the Wayback Machine.
{{PD-USGov}} Interstate Highway plan approved June 27, 1958. Originally scanned by Richard Moeur and downloaded from [http://www.roadfan.com/jun58int.jpg]. Category:Interstate HighwaysCategory:road maps