For some time, the USPS has been employing RHD vehicles to help make delivering the mail an easier task. In rural areas, this allows mail carriers to easily get mail from the truck into a mailbox. And when it comes to city driving, RHD means that drivers do not have to step into traffic as often.
Since the Jeep DJ, a significant portion of mail trucks are RHD, and the Grumman LLV carries on that tradition. Once the Oshkosh NGDV hits the streets, it will also feature the same configuration, even with its EV powertrain. In fact, Jeep still builds a right-hand-drive Wrangler for use by rural mail carriers to get to places the standard Grumman LLV may be unable to go.