SR 143 begins at a four-way intersection with County Road 1650 West crossing north–south and County Road 550 North continues west from the western end of SR 143. The state road heads east passing the main entrance to Jasper-Pulaski Fish and Wildlife Area while passing through wooded area. The wooded area becomes farmland before SR 143 has a four-way intersection with US 421 about midway between Medaryville and San Pierre. The roadway continues east as County Road 550 North.[1][2][3] The highest traffic count for SR 143 in 2014 was at its western end, where 295 vehicles travel the highway on average each day. The lowest traffic count during 2014 was at the eastern end of SR 143, where 264 vehicles travel the highway on average each day.[4]
History
The Indiana State Highway Commission added SR 143, along its modern routing, to the state road system between 1939 and 1941.[5][6] The roadway was paved between 1972 and 1973.[7][8] No major changes have occurred to SR 143 since it was paved.[3][8]
^ abIndiana Department of Transportation (2016). Indiana Roadway Map 2016(PDF) (Map). 1:550,000. Indianapolis: Indiana Department of Transportation. OCLC925532510. Retrieved December 27, 2016.
^Indiana Department of Transportation (2014). "Traffic Count Database System". Indianapolis: Indiana Department of Transportation. Retrieved December 27, 2016.
^Indiana State Highway Commission (1941). State Highway System of Indiana (Map). 1:633,600. Indiana State Highway Commission. OCLC64574634. Retrieved December 27, 2016 – via Indiana State Library and Historical Bureau.
^Indiana State Highway Commission (1972). Indiana State Highway System (Map) (1972–1973 ed.). 1:640,000. Indiana State Highway Commission. OCLC65333830.
^ abIndiana State Highway Commission (1973). Indiana State Highway System (Map) (1973–1974 ed.). 1:633,900. Indiana State Highway Commission. OCLC501330315, 65333444.