E-ZPass

E‐ZPass is an electronic toll collection system used on most tolled roads, bridges, and tunnels in the Midwestern and Eastern United States, as far south as Florida and as far west as Illinois. The E-ZPass Interagency Group (IAG) consists of 39 member agencies in operation within 17 states, which use the same technology and allow travelers to use the same transponder on toll roads throughout the network. Since its creation in 1987, various independent systems that use the same technology have been folded into the E-ZPass system, including the I-Pass in Illinois and the NC Quick Pass in North Carolina. Negotiations are ongoing for nation-wide interoperatibility in the United States (see List of electronic toll collection systems § United States).

Question: do i need an ez pass for each state
Answer: no