Question: do you need ez pass for 66?
Answer: If you travel on Interstate 66 Inside the Beltway 5:30 - 9:30 a.m. eastbound or 3 - 7 p.m. westbound, you need to have an E-ZPass or E-ZPass Flex funded and properly mounted in your vehicle. If you are an HOV-2+ driver, an E-ZPass Flex allows you to use the lanes free when switched to HOV mode.