What is the most effective means of prohibiting left turn access into driveways?

Prohibiting left turn access into driveways is crucial for maintaining smooth traffic flow and enhancing safety. Non-traversable medians serve as an effective means of accomplishing this by physically restricting vehicles from making a left turn into or out of a driveway.

These medians create a barrier that cannot be crossed by vehicles, ensuring that drivers have to continue to the next intersection to make a legal turn. This approach minimizes the likelihood of conflicts between turning vehicles and through traffic, which can lead to accidents or delays. Non-traversable medians are particularly effective in high-traffic areas where managing left turns is vital to maintaining operational efficiency.

In contrast, while options like "No Left Turn" signs and one-way driveway signs can provide guidance to drivers, they do not physically prevent the action they are trying to restrict. Likewise, pork-chop islands, despite being useful for some traffic control scenarios, may not be as effective or comprehensive in completely prohibiting left turns as a non-traversable median. Thus, the physical presence of a non-traversable median is the most effective strategy for preventing left-turn access into driveways.