The Indiana Department of Transportation is surveying wetlands, streams and other environmental features to further refine the I-69 expansion plan.
Indiana is ranked nearly worst in the nation for most rail crossing fatalities.
An engineering inspection last week discovered the infrastructure supporting the road is structurally unsound and unsafe for traffic.
Environmentalists have fought the 47-mile tollway plan, arguing it would threaten the Midewin National Tallgrass Prairie south of Chicago.
Construction along SR-37 south causes significant delays on normal days, but transportation officials suggest avoiding SR-37 when traveling south for the game.
The bypass will run about 6 miles and link Interstate 70 and U.S. 41 around the city's southeast side.
Construction along SR 37 causes congestion every day, but expect long delays on Saturday as hundreds make their way south for the game.
At least one of the subcontractors, Crider and Crider, stopped work on Section 5 this week.
Instead of the one body expected, the grave contained the remains of three adults and four children. The road is being widened.
Roadwork this year is estimated to cost $850 million.