What feature is common to Hazlet Station and Middletown Station?

Hazlet Station and Middletown Station both feature a high-level interlock system, which is designed to facilitate efficient and safe train operations. High-level interlocks enhance safety by ensuring that signals and track switches are operated correctly, allowing for better management of train movements and reducing the likelihood of accidents. This aspect is crucial for maintaining smooth operations on New Jersey Transit lines, ensuring that trains can enter and exit tracks with precision.

The other options do not reflect the shared characteristics of these two stations. While bus terminals, bike rental services, and scenic viewpoints may be present at various transit locations, they are not necessarily common features at both Hazlet and Middletown Stations.