According to the State of TN Department of Transportation, upon procuring TDOT request, the contracting agency (Department of Safety and Homeland Security) agrees to furnish the law enforcement services of its Tennessee Highway Patrol Troopers to control traffic and otherwise assist in securing the public safety where TDOT had issued permits for super heavy and /or extra-over dimensional movements on interstate Highways or highways on the state highway system when load exceeds the following dimensions:
- Sixteen feet (16’) wide on any highway other than interstate or federal-aid highways
- Eighteen feet (18’) wide on interstate or federal-aid highways
- One hundred thirty feet (130’) overall length on any highway
- Seventeen feet (17) high on any high way
- Anytime deemed necessary due to complexity of route or load.
- The Tennessee Highway Patrol will conduct at a minimum a Level II North American Standard inspection prior to performing escort services.
- Substitution of local law enforcement will not be allowed for over-dimensional loads listed in Sections A. through A.5
- If your permit request meets the criteria outlined above, your permit issuance and approval will be contingent upon THP availability.
Please build in extra time in your permit process to anticipate delays that this new process might create.
We are in the early stages of formalizing a standard operating procedure (SOP) between all the stakeholders involved in this process.

