it becomes a four-lane expressway, bypassing Springfield before transitioning back to a rural two-lane road as it approaches Urbana. As it continues north, US 68 passes through West Liberty, Bellefontaine, Kenton, Dunkirk, and Arlington on its way north to its terminus at an interchange with Interstate 75 outside Findlay. In total, US 68 traverses 179.1 miles within Ohio. History From 1926 until the late 1940s, in terms of the routing between Bowling Green and Perryville, US 68 went westward through Springfield, Kentucky to Bardstown, and followed U.S. Route 31E southward to just east of Horse Cave. US 68 then followed the current KY 218 (Charlie Moran Highway) westward into Horse Cave, and then joined U.S. Route 31W from there through Cave City to Bowling Green. US 68 moved to its current routing from Bowling Green to Perryville around 1948–49. US 68 previously ran to Toledo, Ohio, terminating at the west approach to the Anthony Wayne Bridge south of downtown, but the Toledo-Findlay segment was decommissioned in the 1950s. It also passed through Springfield, Ohio prior to its realignment onto a four-lane bypass of that city. Two spans of the US 68/KY 80 Eggner Ferry Bridge over Kentucky Lake collapsed after being struck by a cargo ship on January 26, 2012. The bridge reopened to traffic on May 25, 2012. That bridge was replaced by a new four-lane bridge a few years afterwards. Future In Clark County, Ohio, there is an almost full-access interchange between controlled-access US 68 and US 40/SR 4, which is itself a controlled-access highway until approximately 0.3-mile west of the US 68 interchange. One exit ramp from US 68 ends on Upper Valley Pike, rather than on US 40/SR 4; another entrance ramp includes two-way traffic and an at-grade entrance to a retirement community. On US 40/SR 4 between the controlled-access portion and US 68, there are an at-grade intersection at Upper Valley Pike, other street and driveway breaks in access control and a steep grade on the eastbound approach toward Upper Valley Pike. In September 2013, the Clark County-Springfield Transportation Coordinating Committee (TCC) ranked the US 40/SR 4/Upper Valley Pike intersection as the most hazardous in the county, based on 2010-2012 crash data. Because the road design over the years had played a significant factor in the high number of crashes in the area, the TCC conducted a study; in February 2006 it recommended reconfiguring the