ISTHA Coordinates for Mileposts on the Illinois Tollway, I-90

This dataset has a record for every milepost on I-90 of the Illinois Tollway that includes the route number, the milepost and the latitude and longitude. It lists a milepost every tenth of mile, and every quarter of a mile, but there is actually only a physical milepost every quarter of a mile.

Data and Resources

Additional Info

Field Value
Last Updated August 14, 2017, 19:38 (UTC)
Created August 14, 2017, 19:38 (UTC)