Basic Safety Message
A SAE J2735 vehicle message carrying frequently updated motion and status data for safety applications.
Share this
The problem
Why BSM exists
This section requires approved editorial content.
No substitute explanation has been generated for why Basic Safety Message exists.
Operating model
How BSM works
The approved explanation should connect physical systems, communications, data, security, and operating responsibility.
The Basic Safety Message carries core vehicle state such as position, speed, heading, and acceleration, with optional additional data. Equipped vehicles broadcast it repeatedly so nearby systems can evaluate collision risks and other safety conditions. BSM is a message definition rather than a radio technology and depends on compatible transport, security, positioning, and application processing.
Documented activity
Real-world applications
Examples come from verified deployment relationships rather than template-generated use cases.
Application 01
Safety Pilot Model Deployment
A real-world Ann Arbor deployment of approximately 3,000 connected vehicles and 30 roadside units using DSRC safety messaging.
Example: Completed · City
Knowledge database
Explore the ecosystem
Counts are navigation into the records supporting this technology profile.
Technology map
Related technologies
These records share a documented category. Their placement does not imply technical dependency or compatibility.
This section requires approved editorial content.
No substitute explanation has been generated for related technologies.
Evidence and relationships
Supporting database
Structured records connected to this technology through reviewed Directus relationships.
Projects
Deployments
Completed · City
A real-world Ann Arbor deployment of approximately 3,000 connected vehicles and 30 roadside units using DSRC safety messaging.
Interoperability
Standards
J2735
Defines message sets and data elements used for dedicated short-range and connected-vehicle communications, including safety and mobility messages.
SAE J2945/1
SAE J2945/1 defines minimum performance and behavior for on-board V2V safety communication using SAE J2735 messages. It matters to V2X because it gives independently developed systems a common technical contract.
SAE J3161/1
SAE J3161/1 defines minimum LTE-V2X on-board performance for V2V safety applications. It matters to V2X because it gives independently developed systems a common technical contract.
Institutions
Organizations
standards_development_organization
Standards development organization publishing widely used automotive and V2X message, security, and communications standards.
Geography