Carriers have good reason to limit what's inside your car during shipping: they can get fined for transporting anything other than a vehicle.
Their carrier license doesn't cover household goods, and neither does their insurance. Packing things inside your car might be convenient for you, but it's risky for the driver.
Does that mean your car has to be squeaky clean inside before it's driven onto the trailer? Not exactly. According to Ship a Car Direct, "The Department of Transportation is probably not going to split hairs and fine the trucker over items of that amount [100 pounds or less]."
But drivers can still get fined if their trailers are over the weight limit.
Trailers can only hold so much and still operate safely. Too much weight strains the tires and brakes, slows braking time, increases the risk of tipping over, and limits the roads and bridges the carrier can drive across.
Drivers know about how much each type of car weighs and are careful not to exceed the maximum weight limits. If you pack a sedan full of stuff until it weighs more like a full-size pick-up truck, there could be a problem.
Finally, drivers don't want to be on the hook for any damage to your items. Their insurance only covers damage to the vehicle itself, not to anything inside.
For some car carriers, the answer will always be no—no items in the car, period.
Others will allow you to pack some items but ask that you do the following:
- Sign a waiver acknowledging that the driver/car shipping company is not responsible for any damage to your items during transport
- Pay an extra fee to cover any fines incurred while transporting extra items
- Ensure the total weight of the items is less than 100 pounds
- Pack the items in the trunk or below the window line
- Keep the driver's seat clear for safe loading and unloading
- Don't pack valuable items or cash
- Never pack dangerous or illegal substances