Civil Engineer Licensure Practice Exam

Culvert endwalls can pose a significant hazard to vehicles in road environments due to their structural characteristics and placement. When endwalls are improperly designed or located, they can create a sudden obstruction that may catch drivers off guard, especially in situations of reduced visibility or at night. Inadequate signage or barriers around culvert endwalls can further increase the potential for accidents, as drivers may not be aware of their proximity to these structures.

On the other hand, speed control devices, traffic signals, and toll booths are designed with safety in mind and are typically employed to manage traffic flow and ensure the safety of road users. They serve specific purposes in controlling vehicle speed, directing traffic, and facilitating toll collection, thereby minimizing risk rather than contributing to it.