the original designation of la 81 part of 2 different highway classes reflected in 1960s dotd milepost map.
la 81 created in 1955 collective renumbering of surviving portion of former state route 7 between lottie , livonia entirety of former state route c-1943.
class b : la 81—from junction la-us 190 @ or near lottie junction la 77 near fordoche.
class c : la 81—from junction la 77 @ or near livonia junction la-us 190 @ or near lottie.
with 1955 renumbering, state highway department categorized routes 3 classes: (primary), b (secondary), , c (farm-to-market). northern section of la 81 categorized class b , southern section class c. system has since been updated , replaced more specific functional classification system designates entire route rural local road. however, route of la 81 has remained same present day.
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