| 11. | They were also employed as warning devices in heavy fog, and for alarms and ceremonies.
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| 12. | New technology aside, Gray has his own warning device.
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| 13. | The warning device is set to ring 25 to 40 seconds before an imminent crash.
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| 14. | Our railroad signal system as well as any warning devices are all driven by commercial power,
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| 15. | These failures have also resulted in updated safety policies and adjustments of equipment and warning devices.
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| 16. | Although the 25 m / s winds activated warning devices, the train proceeded across the bridge.
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| 17. | Hughes provides stereos, theft-deterrent systems, engine and transmission control systems, and collision warning devices for GM vehicles.
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| 18. | Both of these warning devices were powered by an electric generator driven by the number one engine.
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| 19. | Hughes makes stereos, theft-deterrent systems, engine and transmission control systems, and collision warning devices for GM vehicles.
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| 20. | A total of 44 states have at least one railroad crossing having a wigwag as its warning device.
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