The fastest a car is supposed to go in Illinois is 65 miles an hour. Drivers could legally accelerate to 70 under a measure approved by the state Senate. The Senate easily passed the measure, 41 to 6. Officials with the Illinois Department of Transportation say it could lead to more serious traffic accidents, because they say drivers will go even faster.
Populous counties, including Cook, the collar counties, Madison and St. Clair can keep the speed limits lower in their areas.
Illinois Public Radio's Amanda Vinicky contributed to this report.