I-70 Bus. starts at exit 125 on I-70/
U.S. Route 40 (US 40) in Columbia. From this interchange, it runs east-southeasterly along a four-lane thoroughfare on the northern side of Columbia. The roadway is bounded by several businesses, including car dealerships and fast-food restaurants. I-70 Bus. intersects
Route 163 (Providence Road) near
Hickman High School. At the intersection with Range Line Street,
Route 763 merges in from the north, and the two highways
run concurrently for three blocks. Route 763 turns southward at the intersection with North College Avenue. I-70 Bus. intersects another highway, Supplemental Route B, on the eastern side of its routing before reaching Conley Road past
Hinkson Creek through the 2018 expansion. Access to I-70/US 40 must go through the I-70 connector. ==History==