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Longitudinal Collision Avoidance
The Longitudinal Collision Avoidance user service is specifically aimed at providing vehicle operators with assistance in avoiding longitudinal collisions to the front and/or rear of the vehicle. The service provides rear-end collision warning and control, Adaptive Cruise Control (ACC), head-on collision warning and control, and backing collision warning. Longitudinal collision avoidance systems assist the driver by: (1) sensing potential and/or impending collisions or dangers to the front or rear of the vehicle; (2) eliciting proper collision avoidance actions from the driver; and/or (3) providing temporary automatic control of the vehicle to assist the driver in avoiding the potential collision situation.
User Service Requirements
| 6.1.0 | ITS shall include a Longitudinal Collision Avoidance Service. PSpecs: 3.1.1, 3.1.3, 3.2.3.2, 3.2.3.3, 3.2.3.4.1, 3.2.3.4.2, 3.2.3.4.5 |
| 6.1.1 | Longitudinal Collision Avoidance Service shall include a Rear-End Subservice. PSpecs: 3.1.1, 3.1.3, 3.2.3.2, 3.2.3.3, 3.2.3.4.1, 3.2.3.4.2, 3.2.3.4.5 |
| 6.1.1.1 | Rear-End Subservice shall include a Headway Maintenance System which assists in maintaining a safe relative longitudinal separation between vehicles. PSpecs: 3.1.3, 3.2.3.2, 3.2.3.3, 3.2.3.4.1, 3.2.3.4.2, 3.2.3.4.5 |
| 6.1.1.1.1 | Headway Maintenance System shall include a Manual Operations Subsystem. PSpecs: 3.1.3, 3.2.3.2, 3.2.3.3, 3.2.3.4.1, 3.2.3.4.2, 3.2.3.4.5 |
| 6.1.1.1.1.1 | Manual Operations Subsystem shall determine impending situations that are inconsistent with safe headway. PSpecs: 3.1.3 |
| 6.1.1.1.1.2 | Manual Operations Subsystem shall alert the vehicle's driver of the need for speed control to maintain a safe headway. PSpecs: 3.1.3 |
| 6.1.1.1.2 | Headway Maintenance System shall include an Autonomous Intelligence Cruise Control (AICC) Subsystem. PSpecs: 3.1.3, 3.2.3.2, 3.2.3.3, 3.2.3.4.1, 3.2.3.4.2, 3.2.3.4.5 |
| 6.1.1.1.2.1 | Autonomous Intelligence Cruise Control Subsystem shall determine actions necessary to maintain the vehicle at a safe distance behind a lead vehicle. PSpecs: 3.2.3.2, 3.2.3.3, 3.2.3.4.1, 3.2.3.4.2 |
| 6.1.1.1.2.2 | Autonomous Intelligence Cruise Control Subsystem shall implement necessary vehicle speed control. PSpecs: 3.2.3.2, 3.2.3.3, 3.2.3.4.1, 3.2.3.4.2 |
| 6.1.1.1.3 | Headway Maintenance System shall include a Cooperative Intelligence Cruise Control (CICC) Subsystem. PSpecs: 3.2.3.3, 3.2.3.4.1, 3.2.3.4.2 |
| 6.1.1.1.3.1 | Cooperative Intelligence Cruise Control Subsystem shall be capable of operating the vehicle in a follow-lead-vehicle mode or a "platoon" mode. PSpecs: 3.2.3.3, 3.2.3.4.1, 3.2.3.4.2 |
| 6.1.1.2 | Rear-End Subservice shall include a Driver Action System PSpecs: 3.1.1, 3.1.3 |
| 6.1.1.2.1 | Driver Action System shall inform the driver of the need for immediate collision avoidance action. PSpecs: 3.1.1, 3.1.3 |
| 6.1.1.3 | Rear-End Subservice shall include an Automatic Control System. PSpecs: 3.1.3, 3.2.3.3 |
| 6.1.1.3.1 | Automatic Control System shall automatically implement needed collision avoidance action. PSpecs: 3.1.3, 3.2.3.3 |
| 6.1.2 | Longitudinal Collision Avoidance Service shall include a Backing Subservice. PSpecs: 3.1.1, 3.1.3, 3.2.3.3 |
| 6.1.2.1 | Backing Subservice shall include an Advisory System. PSpecs: 3.1.1, 3.1.3 |
| 6.1.2.1.1 | Advisory System shall notify the driver of the presence of potentially hazardous situations. PSpecs: 3.1.1, 3.1.3 |
| 6.1.2.2 | Backing Subservice shall include a Driver Action System PSpecs: 3.1.1, 3.1.3 |
| 6.1.2.2.1 | Driver Action System shall inform the driver of the need for immediate collision avoidance action. PSpecs: 3.1.1, 3.1.3 |
| 6.1.2.3 | Backing Subservice shall include an Automatic Control System. PSpecs: 3.1.3, 3.2.3.3 |
| 6.1.2.3.1 | Automatic Control System shall automatically implement needed collision avoidance action. PSpecs: 3.1.3, 3.2.3.3 |
| 6.1.3 | Longitudinal Collision Avoidance Service shall include a Head-On/Passing Subservice. PSpecs: 3.1.1, 3.2.3.3 |
| 6.1.3.1 | Head-On/Passing Subservice shall include an Advisory System. PSpecs: 3.1.1 |
| 6.1.3.1.1 | Advisory System shall notify the driver of the presence of potentially hazardous situations. PSpecs: 3.1.1 |
| 6.1.3.2 | Head-On /Passing Subservice shall include a Driver Action System. PSpecs: 3.1.1 |
| 6.1.3.2.1 | Driver Action System shall inform the driver of the need for immediate collision avoidance action. PSpecs: 3.1.1 |
| 6.1.3.3 | Head-On/Passing Subservice shall include an Automatic Control System. PSpecs: 3.1.1, 3.2.3.3 |
| 6.1.3.3.1 | Automatic Control System shall automatically implement needed collision avoidance action. PSpecs: 3.1.1, 3.2.3.3 |
