  Vehicle-to-everything (V2X) communication in the mmWave band is one way to
achieve high data-rates for applications like infotainment, cooperative
perception, and augmented reality assisted driving etc. MmWave communication
relies on large antennas arrays, and configuring these arrays poses high
training overhead. In this article, we motivate the use of infrastructure
mounted sensors (which will be part of future smart cities) for mmWave
communication. We provide numerical and measurement results to demonstrate that
information from these infrastructure sensors reduces the mmWave array
configuration overhead. Finally, we outline future research directions to help
materialize the use of infrastructure sensors for mmWave communication.
