Location: SR 3 and SR 46, Decatur Cty Reassurance shield with trailblazer to I-74 as SR 46 splits. Location: SR 3 and Michigan Ave, Greensburg As we enter northwest Greensburg, we’ll approach US-421. Location: SR 3 and Michigan Ave, Greensburg US-421 serves as the emergency alternate for I-74. Location: SR 3 and Michigan Ave, Greensburg … Continue reading Indiana State Road 3, IN-46 to US-421