What types of lights should be placed on the outside of a curve?

The correct answer highlights the use of Type C and Type D lights for placement on the outside of a curve. This choice is based on their specific functions in traffic management and safety. Type C lights are typically used for directing traffic and providing visibility at curves or in areas where a change in direction is necessary. Type D lights, on the other hand, are often utilized for warning drivers and highlighting potential hazards ahead, which is crucial in a curve where visibility might be compromised.

Using this combination of lights ensures that approaching drivers are adequately alerted to the curve, reducing the likelihood of accidents due to lack of visibility or lack of clear directional guidance. Each type of light serves a significant role in enhancing safety and maintaining smooth traffic flow, especially in tricky road conditions like curves where misguidance can lead to incidents.