On October 1 , 1956 , RM 1869 was redesignated from FM 1869 .
On October 1 , 1956 , RM 1869 was only running from SH 29 to SH 74 ( now US 183 ) .
On October 1 , 1956 , RM 1869 was redesignated from FM 1869 , but only running from SH 29 to SH 74 ( now US 183 ) .