The highway was extended another approximately 2.7 miles ( 4.3 km ) on January 27 , 1950 .
The highway was was extended another 3.0 miles ( 4.8 km ) to its current terminus on July 11 , 1968 .
The highway was extended another approximately 2.7 miles ( 4.3 km ) on January 27 , 1950 and was extended another 3.0 miles ( 4.8 km ) to its current terminus on July 11 , 1968 .