The only section of K-63 included in the National Highway System is its overlap with US-36. The National Highway System is a system of highways important to the nation's defense, economy, and mobility. K-63 also connects to the NationalHighway System at its southern terminus at US-24. 2017 Annual average daily traffic on K-63 ranged from 465 slightly north of the K-16 overlap, 655 slightly south of the K-16 overlap, 695 slightly south of the K-9 overlap, 910 slightly north of Emmett, 940 slightly north of the K-71 intersection, 1020 slightly north of the K-9 overlap, 1150 slightly south of the K-71 intersection, 1160 along the K-9 overlap, 1190 along the K-16 overlap, 1490 slightly south of Emmett, 1650 slightly north of the US-36 overlap, 1820 slightly south of the US-36 overlap, 3630 near the southern terminus and 5190 along the overlap with US-36.
History
K-63 was first designated as a state highway in 1927. At that time the southern terminus was at US-40. K-16 was originally K-24 but was renumbered to K-16 between April 1933 and April 1936, due to US-24 being extended into Kansas. Also at this time US-24 overlapped US-40 at the southern terminus. This overlap remained until US-40 was realigned onto I-70 and the southern terminus became solely US-24. In a February 21, 1939 resolution it was approved to realign a small section slightly south of Emmett to eliminated 3 curves and straighten the road. Originally US-36 overlapped K-63 for a mile north out of Seneca, then turned east and left K-63 towards Oneida. Then in a March 21, 1939 resolution it was approved to realign US-36 between Seneca and Fairview on a straight alignment, eliminating the overlap with K-63. In a May 28, 1952 resolution it was approved to realign K-63 slightly north of Seneca to eliminate two turns. K-9 originally turned south in Centralia then turned east to K-63 in Corning. Then in a March 9, 1955 resolution it was approved to realign K-9 to continue east from Centralia directly to K-63 then overlap K-63 south to Corning, then turn east in Corning and leave K-63. K-63 originally curved west east of Seneca and crossed the Nemaha River then turned north at the Seneca city limit and then crossed US-36. Then in an August 29, 1956 resolution it was approved to realign K-63 to go directly north to US-36, then overlap US-36 to the original K-63 crossing and turn north.
