The section from Robert Lee to Colorado City was dropped on March 26 , 1942 .
The section from Robert Lee to Colorado City was was reinstated on April 23 , 1947 , when it replaced RM 18 .
The section from Robert Lee to Colorado City was dropped on March 26 , 1942 , but was reinstated on April 23 , 1947 , when it replaced RM 18 .