In order to improve the user experience on the highway, a smart highway sensor system can be connected to the car and other devices. It can provide the driver with the fastest and safest journey on the highway by improved route planning. This paper discusses the potential benefits and challenges of the use of a connected highway sensor system. The provided information is based on a focus group of experts (N= 9) in the scope of the project Providentia. Within this project, a sensor system is built on the highway to track traffic objects. Different user groups that potentially benefit of a smart highway system are identified: Drivers of autonomous and semi-autonomous vehicles, highway operators and teleoperators of autonomous cars. The main benefit for users is the redundant sensor system that provides a far-reaching view. This additional information about the highway situation enables improved route planning for connected vehicles.