Illinois Route 143

Illinois Route 143 is an eastwest state highway in southwestern Illinois. Its western terminus is at U.S. Route 67 (very near, but not at the termini of Illinois Route 100 and Illinois Route 140) in Alton. Its eastern terminus at Illinois Route 127 at a rural intersection west of Tamalco. This is a distance of 47.96 miles (77.18 km).

Illinois Route 143

IL 143 highlighted in red
Route information
Maintained by IDOT
Length47.96 mi (77.18 km)
Existed1937–present
Major junctions
West end US 67 in Alton
Major intersections I-55 in Edwardsville
I-70 in Marine
US 40 in Highland
East end IL 127 in Tamalco
Location
CountryUnited States
StateIllinois
CountiesMadison, Bond
Highway system
IL 142 IL 145
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