5.1 IEEE 802.11p-based DSRC and ITS-G55.2 LTE and 5G NR V2X5.3 C-V2X Phase 1 where 3GPP works on LTE Vehicular Services 5.3.1 Vehicle-to-vehicle (V2V) Communications5.3.2 Vehicle-to-pedestrian (V2P, P2V) Communications5.3.3 Vehicle-to-infrastructure (V2I, I2V) Communications5.3.4 Vehicle-to-network Communications (V2N, N2V)5.3.5 Synchronization5.3.6 Location Determination5.4 C-V2X evolution toward Phase 2 and beyond