Indiana State Route 54 is an east-west highway in East-Central Sullivan County. It runs from U.S. Rt. 41/150, on the southside of Sullivan, to the the Sullivan/Greene County Line, near Ellis. IN St Rt 54 intersects the following towns in Sullivan County. Sullivan Dugger IN St Rt 54 is not multi-plexed in Sullivan County. IN St Rt 54 intersects the following highways in Sullivan County. U.S. Rt. 41, at Sullivan. U.S. Rt. 150, at Sullivan. Indiana State Route 159, at Dugger.