Senior Project Engineer salary at Illinois State Toll Highway Authority

The average senior project engineer salary at Illinois State Toll Highway Authority was $142,206 , which is 26 percent higher than the average salary for this job in Illinois, and 35 percent higher than the national average for this job . Senior Project Engineer salaries at Illinois State Toll Highway Authority typically range from $138,645 to $149,326 (25th to 75th percentile). The highest reported senior project engineer salary was $149,326. There are 3 employees at Illinois State Toll Highway Authority with the job title senior project engineer.