Post B8mh7qV9NZPW3BAdWa by Dan_Ramos@noauthority.social
 (DIR) More posts by Dan_Ramos@noauthority.social
 (DIR) Post #B8mh7qV9NZPW3BAdWa by Dan_Ramos@noauthority.social
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       I kinda knew this for decades but not because it was overtly taught to me.  I kinda figured it out because I love driving long distances (and drove all over the USA) but started to notice these patterns in the numbers.  Heheh
       
 (DIR) Post #B8n9Fpvny9eRviOSKO by ReadyKilowatt@noauthority.social
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       @Dan_Ramos Except for I-99 in Pennsylvania."I-99 breaks the AASHTO numbering pattern associated with Interstate Highways, as it would be expected to lie east of I-97 but instead lies east of I-79 and west of I-81."https://en.wikipedia.org/wiki/Interstate_99