^Westbound trailblazer at Illinois 96 in Atlas, Illinois, June 2023.
US Route 54's eastern end is in western Illinois, and its length in Illinois is only about 24 miles. All 24 of those miles are within Pike County. It crosses the Mississippi River from Louisiana, Missouri, and heads northeast to end at Interstate 72 and US Route 36 near Griggsville.
US Route 54 crosses the Mississippi River into Illinois via a bridge out of Louisiana, Missouri:
US Route 54 crosses the Mississippi River into Illinois via a bridge out of Louisiana, Missouri:
After about five miles, US Route 54 crosses Illinois 96:
West of Pittsfield, US Route 54 joins Illinois 106 east...
In Pittsfield, US Route 54 splits from Illinois 106 to head north:
US Route 54 ends, becoming Illinois 107, at an interchange with Interstate 72/US Route 36, south of Griggsville:
The end marker and the accompanying junction marker assembly shown above used to look like this back in 2005:
