You may want to set some conditions in your search for the nearest vehicles.
To do that, in the Nearest vehicles panel click the Filter button at the top:
A panel will pop up, in which you will be able to establish several conditions that the vehicles must comply with. For instance, you can use this to locate only vehicles of a certain type or class:
After you make your choice of parameters, make sure to Save. The list with the nearest vehicles will be changed to respect your new requirements.