This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Bridge formula. Federal bridge formula axle groups Axles and are the tractor group Axles and are the trailer group fhwa dot gov htm Department of Transportation Highway Administration Image Axlegroups svg PDUSGov Bridge elements
Page 2023 Free-images.com. All images are Public Domain