The average road salary at Frio County was $36,341 , which is 3 percent higher than the average salary for this job in Texas, but 27 percent lower than the national average for this job . Road salaries at Frio County typically range from $33,405 to $37,877 (25th to 75th percentile). The highest reported road salary was $46,030. There are 23 employees at Frio County with the job title road.