“…To obtain further insights into the benefits of truck platooning on rural roads, we suggest redoing the field study with vehicle-to-vehicle communication, allowing for shorter following distances, and also performing a manual-driven baseline first.Keywords: Truck platooning (1); field trial (2); rural roads (3); road geometry (4); tunnels (5).[1,2,9,10], improved traffic flow [4,11], reduced need for road expansions [9], improved safety [2,9], and, in the longer-term, lower cost through partly or fully driverless operations [2,12] which may also mitigate driver shortages [13].However, many freight routes are rural two-way, two-lane roads [14,15] with narrow widths, challenging alignment, few median barriers, and sub-highway speed limits of 70-80 km/h. It is unlikely that earlier findings about platooning feasibility are transferrable to such roads [12]. While automation may make vehicles and infrastructure more interdependent [16][17][18], the specifications for truck platooning are largely unknown, and it is unclear how roads authorities, which may have to regulate platoons and ready their infrastructure, should prepare [19].…”