Regional Authorities and Special Districts - As enacted, authorizes the Megasite Authority of West Tennessee and certain law enforcement agencies to enter into a written agreement authorizing sworn peace officers of the law enforcement agency to enforce certain traffic laws on one or more designated private megasite roadways identified in the agreement. - Amends TCA Title 54 and Title 64, Chapter 9.

HB 1739 authorizes the Megasite Authority of West Tennessee and local law enforcement agencies to enter written agreements allowing sworn officers to enforce traffic laws on designated private roads within the megasite. The bill requires agreements to include detailed road maps, mandatory traffic signs meeting state standards, and clear entrance notices stating local traffic laws apply. It specifies that these agreements do not make private roads public property, transfer ownership, or create public access rights. The law applies only to roads not already dedicated to public use, with enforcement limited to traffic laws under Title 55 of Tennessee Code. This directly affects the Megasite Authority, participating counties/municipalities, and their law enforcement agencies.