Illinois Heavy Equipment Shipping
Illinois is two different heavy haul problems in one state: dense urban routing around Chicago, and long agricultural runs downstate where the machines are wide rather than heavy. The legal limits are the same everywhere, but which one you are up against changes the trailer, the permit and the schedule. The number that decides most of it is the width of the machine, because that is what a road cannot be made to accommodate.
What Moves Without a Permit
Anything inside the standard legal envelope travels as ordinary freight, and it is worth knowing where the edges are.
The limits are 8 feet 6 inches wide, 13 feet 6 inches high measured from the road surface, and 80,000 pounds gross for the whole combination, with 20,000 pounds on a single axle and 34,000 on a tandem. Stay inside all of those and no permit is required.
The height figure catches people because it includes the trailer. A flatbed deck sits around 5 feet off the road, so a machine 9 feet tall is already at 14 feet and over the limit before anybody has measured the cab. A step deck lowers the deck by roughly a foot and a lowboy lowers it considerably more, and on a lot of machines that trailer choice is the whole difference between a permit and no permit.
When You Need a Permit
Past any of those limits, the load needs an oversize or overweight permit from the Illinois Department of Transportation, issued against a specific machine, a specific configuration and a defined route.
Routine permits are normally issued quickly. Wider loads bring escort vehicles into the picture, with the thresholds set by the state and varying with the type of road, and past a certain size the load becomes a superload, which requires engineering review of the structures on the route and can take weeks rather than days.
One detail specific to Illinois catches carriers from out of state. The Illinois Tollway system, which includes the main routes around Chicago such as I-88, I-90 and I-294, issues its own permits separately from IDOT. A load permitted for the state highway system is not automatically permitted on the tollway, and discovering that at a plaza is an expensive way to learn it.
Permits are also route specific rather than general. Change the trailer, the axle spacing or the roads and the permit no longer describes the load.
Chicago Adds Its Own Layer
Getting a machine to a Chicago job site is usually harder than getting it to Illinois.
The city issues its own permits for oversize movement on city streets, separately again from the state and the tollway. Movement on the expressways is restricted during peak hours, which compresses the working window. And the older viaducts on the South and West Sides carry posted clearances well under the 13 feet 6 inches you can assume elsewhere, so a route that looks direct on a map can be impossible for a loaded lowboy.
The practical answer is to have the route surveyed rather than assumed, and to build the schedule around a morning departure and a daylight arrival.
Agricultural Equipment and Harvest Timing
Downstate the machines are different and so is the constraint.
Combines, planters and sprayers are enormous in width and comparatively light. A combine with the header fitted can be over 20 feet wide, which is a permitted load with escorts in any state. Take the header off and move it separately on its own trailer and the same machine frequently comes back inside a manageable width, which removes escorts and route restrictions along with the cost of both.
Timing matters more here than anywhere. Demand for agricultural transport spikes hard in the spring planting window and again through the October and November harvest, and carriers with the right trailers are committed months ahead. Book agricultural moves early or plan around the shoulder seasons.
Choosing the Trailer
Four options cover almost everything, and the machine picks one rather than the other way round.
A flatbed suits machines inside legal height with the deck height added, typically smaller equipment such as skid steers, mini excavators and attachments. A step deck buys about a foot of height and handles mid size machines. A lowboy or removable gooseneck drops the deck to a couple of feet off the road and is what large dozers, excavators and cranes travel on. Multi axle and stretch configurations come in when the weight or the axle spacing needs spreading to satisfy the federal bridge formula.
Preparing the Machine
Most claims on heavy equipment come from preparation rather than driving, and the fixes are simple.
Give an accurate weight from the manufacturer’s specification or, better, a certified scale, and include everything traveling with it: counterweights, attachments, full tanks and fluid filled tires all add real weight that is invisible from outside. Give the measured height from the ground to the highest fixed point rather than the brochure figure.
Then reduce the envelope where you can. Removing a counterweight, folding or removing a boom, taking off a bucket or swapping wide pads can bring a load back under a threshold and save a permit and an escort. Secure or remove anything loose, drain what needs draining, disconnect the battery on a long move, and clean the tracks or tires, since carried mud is both a weight and a road hazard.
Photograph the whole machine in daylight before it loads, including the undercarriage, the glass and the hour meter, and get any existing damage described specifically on the bill of lading. On used equipment that record is what decides a claim. Our guide to wide and oversize loads covers the dimension rules in more detail.
Seasonal Windows
Illinois winters restrict permitted movement, and the restriction is weather driven rather than scheduled.
Permitted loads generally move in daylight on weekdays, and they do not move in high wind, snow or ice. Northern Illinois also sees seasonal weight limits on local roads during the spring thaw, when the ground loses bearing capacity. Neither stops a shipment, but both mean a permitted load in January or March should carry more slack in the schedule than the same load in July.
Common Questions
When does a machine need an Illinois permit? Past 8 feet 6 inches wide, 13 feet 6 inches high measured from the road, or 80,000 pounds gross, or any axle limit.
Is the tollway covered by my state permit? No. The Illinois Tollway issues permits separately from IDOT, and Chicago issues its own again for city streets.
How do I keep a combine legal? Remove the header and ship it separately. That usually brings the machine back inside a workable width and removes the escorts.
What trailer will my machine need? Flatbed for small equipment, step deck for mid size, lowboy for large dozers and excavators, multi axle where the weight needs spreading.
How far ahead should I book? A week or two for a routine permitted load, considerably longer for a superload or for agricultural equipment in planting or harvest season.
Get a Quote
Call Ship A Car, Inc. at (866) 452-3657 for heavy haul and specialized freight with the machine’s make and model, its measured width, height and weight, and both site addresses, or price it with the specialized transport calculator.
