Which of the following types of curb is suited for areas where drivers should not mount the curb or sidewalk?

The barrier curb is specifically designed to prevent vehicles from crossing over to adjacent areas, such as sidewalks or landscaped zones. Its height and shape make it difficult for vehicles to mount it, thereby ensuring that drivers remain on the roadway and do not encroach onto pedestrian paths. This type of curb is crucial in urban settings where pedestrian safety is a priority, as it creates a physical barrier that discourages accidental or intentional vehicle incursions into pedestrian areas.

In contrast, the mountable curb is designed specifically to allow vehicles to drive over it, making it suitable for areas where temporary crossings might be necessary, such as emergency vehicle access. The drop curb often features a sloping transition, allowing for easier accessibility into sidewalks from the roadway, which could encourage vehicles to mount the curb. The berm curb is typically used to direct water runoff and may not provide the same level of restriction against vehicle encroachment as a barrier curb. Thus, for areas where vehicle encroachment must be strictly avoided, the barrier curb is the most appropriate choice.