  Connected vehicles are no longer a futuristic dream coming out of a science
fiction, but they are swiftly taking a bigger part of one's everyday life. One
of the key technologies actualizing the connected vehicles is
vehicle-to-everything communications (V2X). Nonetheless, the United States
(U.S.) federal government decided to reallocate the spectrum band that used to
be dedicated to V2X uses (namely, the ``5.9 GHz band'') and to leave only 40\%
of the original chunk (i.e., 30 MHz of bandwidth) for V2X. It ignited concern
of whether the 30-MHz spectrum suffices key V2X safety messages and the
respective applications. We lay out an extensive study on the safety message
types and their latency requirements. Then, we present our simulation results
examining whether they can be supported in the 30-MHz spectrum setup.
