SAE J3224 supports vehicle-based V2X sensor sharing via SDSM. SAE J3224/1 describes infrastructure-based detection and sharing of VRU information, with final approval in Motor Vehicle Council balloting and publication planned for August 2026. SAE J3251 specifies OBU device requirements for CDA-equipped vehicles and wheeled VRU types, with publication targeted for Q3 2027. SAE J5001 on PSM communications is on hold due to spectrum limitations and market adoption issues.