Corrected dates along I-74/I-275/US 52 concurrency
Added streets cut off by Northwest Expy.
Extended I-74/U.S. 52 to Harrison–Brookville exit
Added westernmost segment of X-County Hwy., Blue Rock Rd. & Relocated Blue Rock Rd.
Converted multipolygon relation to bridge relation
Corrected dates on C&O Bridge, Clay Wade Bailey Bridge; added former C&O Bridge
Added Northeast Expy. between Williams & Dana
Removed end dates from extant roadways
Extended Circle Freeway to U.S. 52
Extended Circle Freeway to Five Mile Rd.
Connected Northwest Expy. inside Circle Freeway loop
Added parts of Northwest Expy., Mill Creek Expy.
Added embankment and presumed towpath
Redrew Miami and Erie Canal through Hamilton; added Erie Highway; corrected dates on CH&D