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In the US 49/563.5 regulatory framework, Event data recorder is defined as a . a device or function in a vehicle that records the vehicle's dynamic time-series data during the time period just prior to a crash event (e.g., vehicle speed vs. time) or during a crash event (e.g., delta-V vs. time), intended for retrieval after the crash event.
The Fox River Grove crash stands as the worst crash involving a Metra train in its history, and one of the worst grade crossing crashes in U.S. history. At the crash site, the improved signaling system installed after the crash now protects the passing trains and motor vehicle traffic.
Traffic collision reconstruction is the process of investigating, analyzing, and drawing conclusions about the causes and events during a vehicle collision. . Reconstructionists conduct collision analysis and reconstruction to identify the cause of a collision and contributing factors including the role of the driver(s), vehicle(s), roadway and gen
Traffic signal timing is a very complex topic. For example timing a 'WALK' signal for a wide pedestrian crossing and slower pedestrians (for example the elderly) could result in very long waits for vehicles, and thus increases the likelihood of cars running the light, which could potentially cause accidents. Therefore, optimizing the safety of ...
The latter can e.g. be calculated from the signal of the vehicle's wheel speed sensor. The recording of any signals that are available on the vehicle's own CAN bus, is possible with higher-class devices as well as the detection of a GPS signal for position and speed determination. Depending on the manufacturer, about 20 to 30 s are recorded ...
They are usually traffic officers who have investigated a great number of nonfatal crashes and have advanced towards more in-depth crash investigation. Although they may not be the first responders to traffic-related fatalities, they will be called upon to take over the investigations at an early stage and see them through to their conclusions.
Traffic actuated signal systems use detectors to adjust timing for: Only the main street - semi-actuated system; Both main and cross streets - fully actuated system. The above method is primitive real-time signal optimization at best. This method will optimize one traffic signal at a time.
Vehicular communication systems are computer networks in which vehicles and roadside units are the communicating nodes, providing each other with information, such as safety warnings and traffic information. They can be effective in avoiding accidents and traffic congestion. Both types of nodes are dedicated short-range communications (DSRC ...