Was Ferris Bueller's Day off Trip Physically Possible?

Was Ferris Bueller's Day Off Trip Physically Possible?

On Ferris Bueller's self-rewarded day off from school, he visits 9 locations, not including his own home with his friend, Cameron and girlfriend, Sloane. Due to the firmly implicated time of his father's return at 6 P.M sharp, Ferris had between around 9:30-10 A.M. and 5:50 P.M. to complete his downtown adventure. Given this around 7 ½ hour time period, he must get moving pretty quickly to visit all of his stops in the Chicago area.

The day starts at Ferris' house, where he sells his fake illness to his parents so they can let him stay home. Due to the average start of the work and school day, I predict this is around 8:30 A.M. After they leave, he showers, eats, and then calls Cameron to come over so they can venture out. This should have taken them about an hour leaving the time at 9:30 A.M. When Cameron arrives, they make their phony call to Mr. Rooney, and then go to pick up Sloane from their school, which was shot at Glenbrook North High School, at around 10:00 A.M. They are driving Cameron's dad's 1961 Ferrari GT California, which can reach a top speed of 155 mph, so with the daring personality of Ferris driving, we can assume he drove at about 90 mph on the freeway to downtown Chicago, which, from the school, should have gotten them there at around 10:25 A.M. This is because their next location was the Self-Park Parking Deck on Madison Street, which is 22 miles away from the location