Final answer:
Secondary roads often feature steep hills and sharper curves than primary roads due to the surrounding topography. Banked curves on these roads can be steeper to allow for safer navigation of sharp turns, a concept derived from physics applied to race tracks.
Step-by-step explanation:
When discussing secondary roads, it is accurate to say that they may often have more steep hills and sharp curves compared to primary roads. The terrain surrounding secondary roads contributes to these characteristics. For instance, secondary roads near uplands may have steeper inclines as they are affected by the typography of the surrounding landscape. This can result in surfaces with overthickened horizons due to deposition, whereas steeply sloping areas might experience significant erosion.
When examining the concept of banked curves, physics tells us that these assist in negotiating turns more effectively. Steeply banked curves, such as those found on race tracks, allow vehicles to take turns at higher speeds due to the angle of the slope, which reduces the reliance on friction between the tires and the road. These principles can be applied to secondary roads, where banked curves might be more pronounced to account for the sharper turns and increase safety in these less regulated and less maintained roads.