Which device is least likely to provide an accurate sense of the severity of an upcoming bend?

The GPS system is typically programmed with algorithms that can predict road conditions, including bends and turns, based on available geographical data. It can gauge the severity of an upcoming bend by analyzing the curvature of the road.

Road maps provide a visual representation of the road layout, indicating the presence of bends and curves but may not always convey the precise nature or severity of these features. While they can be helpful, they lack detailed real-time data.

The speedometer measures the vehicle's speed, which is independent of the road's curvature and does not provide any information about bends.

A Sat Nav, on the other hand, functions similarly to a GPS but incorporates real-time data and notifications about road conditions, including upcoming hazards and bends.

In this context, the Sat Nav likely incorporates information and predictions about upcoming bends more effectively than mere road maps, while the speedometer remains fundamentally unrelated to bend severity. However, since the question asks for the device least likely to provide an accurate sense of the severity of an upcoming bend, it can be understood that the Sat Nav is more capable than traditional road maps in terms of evaluating the severity of bends while the GPS system offers additional predictive capabilities. The device least equipped for this purpose clearly would be the speedometer