Which factor is NOT an example of environmental design for enhanced security?

Low lighting is not an effective measure for enhancing security through environmental design. In fact, insufficient lighting can create areas of concealment where potential intruders or threats may operate unnoticed. Proper lighting is essential for safety and visibility, allowing surveillance systems and individuals to observe and respond to unusual activities.

On the other hand, hedge walls can serve as physical barriers that provide privacy and define property lines, while surveillance cameras are crucial for monitoring and recording activities in and around a facility, thus enhancing overall security. Vehicle height restrictions are also a strategic measure to prevent unauthorized vehicle access or blockades, mitigating risks from potential vehicle-based attacks. Each of these options contributes positively to a secure environment, while low lighting does the opposite by reducing visibility and increasing vulnerability.