| Ritter | Zoe | 128 Seventh Avenue, Inglewwod | Dodge | 5212 | Metro Private Car | 1926-27 |
| Riva | A. H. | Mount Lawley | Hobart 2¾ H.P. Motorcycle | P 70 | Perth Municipality | 1916 |
| Riverina South G.M. | - | Riverina | Buick 15-20 H.P. | MN ● 7 | Menzies Road Board | 1917-18 |
| Riverina South Gold Mine | - | Riverina | Buick 20 H.P. | MN 7 | Menzies Road Board | 1919 |
| Rlavel | R. | - | Oldsmobile | NR ● 128 | Northampton Road Board | 1926-27 |
| Roach | J. | Toodyay | Ford | T ● 96 | Toodyay Road Board | 1925-26 |
| Roach | J. | Toodyay | Ford | T ● 96 | Toodyay Road Board | 1926-27 |
| Roach | J. | Toodyay | Ford | T ● 96 | Toodyay Road Board | 1927-28 |
| Roach | J. PO | Roebourne | Overland | TB ● 14 | Tableland Road Board | 1926-27 |
| Roach | Mrs F | 15 Helena Street, East Guildford | Chevrolet | 5271 | Metro Private Car | 1927-28 |
| Roach | Mrs M. | 246 Mandurah Road, South Fremantle | Whippet | 12146 | Metro Private Car | 1926-27 |
| Roach | Mrs M. | 246 Mandurah Road, South Fremantle | Whippet | 12146 | Metro Private Car | 1927-28 |
| Roach | Mrs M. B. | 246 Mandurah Road, Fremantle | Overland | 5001 | Metro Private Car | 1925-26 |
| Roach | Mrs M. M. | 246 Mandurah Road, Fremanttle | Overland | 5001 | Metro Private Car | 1924-25 |
| Roach | S. G. | Pithara | Ford | DL ● 27 | Dalwallinu Road Board | 1922-23 |
| Roach | S. G. | Pithara | Ford | DL ● 27 | Dalwallinu Road Board | 1923-24 |
| Roach | S. G. | Pithara | Ford | DL ● 27 | Dalwallinu Road Board | 1924-25 |
| Roach | S. G. | Pithara | Studebaker | DL ● 112 | Dalwallinu Road Board | 1925-26 |
| Roach | S. G. | Pithara | Ford | DL ● 27 | Dalwallinu Road Board | 1925-26 |
| Roach | S. G. | Pithara | Studebaker | DL ● 112 | Dalwallinu Road Board | 1926-27 |
| Roach | S. G. | Pithara | Studebaker | DL ● 112 | Dalwallinu Road Board | 1927-28 |
| Roach | Thos. | 1298 Hay Street | Essex | 600 | Metro Private Car | 1922-23 |
| Roach | Thos. | 41 Pier Street, Perth | Hudson | 600 | Metro Private Car | 1923-24 |
| Roach | V. L. | 67 Carnarvon Street, Victoria Park | Ford | 11370 | Metro Private Car | 1927-28 |
| Roach | W. A. | Narembeen | Ford | NB ● 117 | Nareembeen District Road Board | 1926-27 |
| Roach | W. A. J. | Narembeen | Ford | NB ● 116 | Narembeen Road Board | 1927-28 |
| Roach | W. A. J. | Narembeen | Ford | NB ● 129 | Narembeen Road Board | 1927-28 |
| Roack | A. P. | Fitzgerald Street, Geraldton | Buick | GN 198 | Geraldton Municipality | 1927-28 |
| Road | Board | Marble Bar | Ford Truck | MB ● 33 | Marble Bar Road Board | 1927-28 |
| Road Board | - | - | Chevrillet | NA ● 2 | Nungarin Road Board | 1924-25 |
| Road Board | - | Narrogin | Ford Truck | NO ● 71 | Narrogin Road Board | 1925-26 |
| Road Board | - | Marble Bar | Ford Truck | MB ● 33 | Marble Bar Road Board | 1925-26 |
| Road Board | - | Meekatharra | Ford Truck | MK ● 1 | Meekatharra Road Board | 1926-27 |
| Road board | - | Meekatharra | Overland | MK ● 43 | Meekatharra Road Board | 1926-27 |
| Road Board | - | Pinjarra | Vulcan Truck | MY ● 204 | Murray Road Board | 1926-27 |
| Road Board | - | Narrogin | Ford Truck | NO ● 71 | Narrogin Road Board | 1926-27 |
| Road Board | - | Wyalkatchem | International Truck | WM ● 250 | Wyalkatchem Road Board | 1926-27 |
| Road Board | - | Marble Bar | Ford Truck | MB ● 20 | Marble Bar Road Board | 1926-27 |
| Road Board | - | Marble Bar | Ford Truck | MB ● 33 | Marble Bar Road Board | 1926-27 |
| Road Board | - | Katanning | Ford Truck | KA ● 269 | Katanning Road Board | 1926-27 |
| Road Board | - | Narrogin | Ford Truck | NO ● 71 | Narrogin Road Board | 1927-28 |
| Road Board | - | Meekatharra | Ford Truck | MK ● 1 | Meekatharra Road Board | 1927-28 |
| Road Board | - | Meekatharra | International Truck | MK ● 43 | Meekatharra Road Board | 1927-28 |
| Road Board | - | Northam | Vulcan Truck | N ● 139 | Northam Road Board | 1927-28 |
| Road Board | - | Wogan Hill | Ford | WB ● 47 | Wongan-Ballidu Road Board | 1927-28 |
| Road Board | - | Wongan Hills | Ford Truck | WB ● 212 | Wongan-Ballidu Road Board | 1927-28 |
| Road Board | - | Marble Bar | Ford Truck | MB ● 20 | Marble Bar Road Board | 1927-28 |
| Road Board | - | Pinjarra | Vulcan Truck | MY ● 204 | Murray Road Board | 1927-28 |
| Road Board | - | Wyalkatchem | International Truck | WM ● 250 | Wyalkatchem Road Board | 1927-28 |
| Road Board | M. & D. | Meckering | Ford 20 H.P. | ME ● 1 | Meckering Road Board | 1917-18 |
