PLANNING A TRIP CHICAGO TO ST LOUIS. GOOGLE EARTH MAP DIRECTIONS SHOW TAKE EX 157A TO DECATUR/INDIANAPOLIS ?

is this correct? why should i head toward Decatur to go to St Louis at this location?|||That is not correct. You take I55 the entire way, it is actually the Chicago to St. Louis highway, built specifically for the purpose of the quickest route between the two cities|||I've had trouble with google road directions too. In fact went 60 miles in the wrong direction. I found that www.randmcnally.com directions are better