Disclosed embodiments include technologies for managing co-existence among multiple Vehicle-to-Everything (V2X) Radio Access Technologies (RATs) through the setting of a Network Allocation Vector (NAV). MAC layer frame headers contain a duration field that specifies a transmission interval during which a shared channel will be occupied by a particular V2X RAT. The NAV indicates the time period intended to be held for the particular V2X RAT, and acts as an indication for how long stations implementing different V2X RATs must abstain from accessing the shared medium. Stations listen on the shared medium to obtain the MAC layer frame, read the duration field, and set their NAV indicators accordingly. Other embodiments are described and/or claimed.