Business Loop I-70 - Springfield

The lone business route east of the Mississippi River for Interstate 70 traveled a 15.4 mile long linear course through the city of Springfield. Since signs were sparsely posted, the implied route of Business Loop I-70 followed the expressway along Ohio State Route 4 northeast from Exit 47 to U.S. 40 (Main Street) on the western outskirts of the city. U.S. 40 continued the route east as an urban boulevard (Park Road) to a couplet consisting of three eastbound lanes along Columbia Street and three westbound on North Street.

Advancing east from SR 72 (Spring Street), the couplet of U.S. 40/Business Loop I-70 converged ahead of underpasses for Langonda Avenue and Simon Kenton Trail. Main Street again lines the route as a four lane commercialized boulevard. Further east, U.S. 40/Business Loop I-70 widen into a four lane divided highway along National Road as they vacate the Springfield urban area through remaining agricultural areas. Business Loop I-70 ended as U.S. 40 converged with Interstate 70 at Exit 62 (H. Page, personal communication).

Remaining shields for Business Loop I-70 across Springfield included tri-color markers westbound after I-70 in 2008 and on both directions of U.S. 40 at Bird Street in 2015. Standard shields for BL I-70 stood along U.S. 40 (Columbia Street) eastbound ahead of the Spring Street (SR 72) overpass and westbound at Foster Street in 2011. Beyond SR 72, trailblazers for I-70 take the place for Business Loop I-70 west along U.S. 40.