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Valhalla train crash, 2015 accident in similar setting in New York where SUV on tracks was struck by rush-hour commuter train, killing six including SUV driver; crossing barrier struck vehicle, driver was apparently unaware she was in train's path, and questions were raised about traffic signal timing on adjacent major highway.
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.
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 ...
It uses physics and vehicle dynamics, as well as road user psychology and human factors engineering, to reduce the influence of factors that contribute to crashes. A typical traffic safety investigation follows these steps: [1] 1. Identify and prioritize investigation locations.
Accident data recorder UDS 2165 (VDO Kienzle rel. 1.3) - Installation during crash test Example of a data curve of a crash recorder that is recorded in a traffic accident. The accident data recorder ( ADR , German commonly abbr.: UDS , also accident (data) writer) [ 1 ] is an independent electronic device that records before, during, and after ...
[citation needed] Now, when a signal is red (or double red) only because of grade timing, the (top) red light begins flashing once a train has passed the preceding signal that displayed the lunar white light. The trip arm remains up during this phase, but the flashing red confirms to the driver that there was a lunar white on entry to the ...
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.