What type of equipment do parking enforcement officers commonly utilize?

Parking enforcement officers commonly utilize handheld devices for ticketing because these devices streamline the process of issuing citations and managing parking violations. These devices are equipped with software that not only allows officers to print tickets on the spot but also helps in accessing vehicle information, scanning license plates, and updating the status of parking violations in real-time. This technology enhances efficiency and accuracy in enforcement duties, enabling officers to provide timely and organized services.

In contrast, the other options do not reflect the standard practices in parking enforcement. Public transport tickets are unrelated to parking enforcement; personal vehicles alone do not provide the necessary tools for efficient ticketing; and relying solely on paper would slow down the enforcement process and increase the margin for error.