Oxcart is a software company and can not give any advice on permit requirements or size/weight limitations. The following resources may be helpful in determining permit requirements. Any additional questions should be directed toward the municipality where you are seeking a permit.
IDOT Oversize/Overweight Permits
http://www.idot.illinois.gov/doing-business/permits/Oversize-and-Overweight-Permits/index
IDOT Policy Manual (2025)
https://webapps.dot.illinois.gov/ITAP/Pages/RedirectURL?ConstantVal=PolicyManual
IDOT OPER 993 Form (Special Vehicle Movement Permit Provisions) https://webapps.dot.illinois.gov/ITAP/Pages/RedirectURL?ConstantVal=Oper993pdfLink
IDOT OPER 753 Form (Legal Dimensions and Weights)
https://webapps.dot.illinois.gov/ITAP/Pages/RedirectURL?ConstantVal=Oper753pdfLink