A monitoring service is configured to receive monitoring data from one or more collision detection systems. The monitoring data may comprise collision detection information, such as a collision detection model, sensor data, data pertaining to potential collisions, data pertaining to collisions, vehicle identifier(s), and so on. The monitoring service may extract and/or derive indexing criteria from the monitoring data, and may store and/or index the monitoring data on a persistent storage. An entity may request monitoring data pertaining to a specified time, location, and/or vehicle. The monitoring service may respond to the request by identifying monitoring data that conforms with the request, and providing the identified monitoring data to the requesting entity. The monitoring service may issue collision notifications to emergency service entities and/or may provide collision alerts to vehicles in the vicinity of a collision.