When should vehicular warning lights (flashers) be activated on farm vehicles?

Activating vehicular warning lights, or flashers, is particularly important for farm vehicles when they are being driven on a highway. This safety measure is designed to alert other drivers to the presence of slower-moving vehicles, such as tractors and implements, which may not be as easily visible or may be traveling at speeds significantly less than that of regular traffic. By using warning lights while in motion on highways, operators provide a clear signal to enhance safety and reduce the risk of accidents due to sudden speed differentials.

In contrast, while farm vehicles should use flashers when parked on the side of a road to indicate a potential hazard, this option doesn't encompass the broader and more critical context of highway safety. The use of flashers at nighttime is important for visibility, but it does not apply exclusively to nighttime and should not be limited to that timeframe. Approaching intersections might also necessitate caution, but this does not specifically warrant the use of flashers unless the vehicle is in motion on a highway. Therefore, the correct context for using flashers is indeed when the vehicle is actively being driven on the highway, ensuring that all other road users are adequately informed and able to take appropriate action.