A DUI vehicle should be custom-designed to ensure the most efficient workspace for the team who will be utilizing it. As is true with any emergency response vehicle, there is no one-size-fits-all for DUI vehicles.  Customization allows departments to pick a vehicle that is the right size for their needs. DUI vehicles can be as small as a van or as large as a full semi-trailer. Additionally, creating a custom DUI unit allows the department to weigh in on what equipment will make its job easiest, as well as ensuring that all local regulations are met.  Finally, different regions of the US might prioritize different needs for their DUI vehicle. For example, in colder climates, keeping personnel and civilians protected from the elements might be key. Customization ensures no detail is left unnoticed.