| Roberts | J. C. | Collie | Chevrolet Truck | CM 64 | Collie Municipality | 1927-28 |
| Roberts | J. F & N. P | Kulin | Ford Truck | KU ● 40 | Kulin Road Board | 1927-28 |
| Roberts | J. F. | Suburban Road | Ford 20 H.P. | SP 164 | South Perth Municipality | 1919 |
| Roberts | J. F. & N. P. | Kulin | Ford Truck | KU ● 40 | Kulin Road Board | 1926-27 |
| Roberts | J. H. | 62 Kingsway Street, Claremont | Ford | 7446 | Metro Private Car | 1926-27 |
| Roberts | J. Smith | Mount Satirist, via Whim Creek | Overland 20 H.P. | R 1 | Roebourne Road Board | 1916 |
| Roberts | J. T. | 62 Kingway Claremont | Ford | 8460 | Metro Private Car | 1925-26 |
| Roberts | J. T. Hillman | 62 Kingsway Street, Claremont | Ford | 7446 | Metro Private Car | 1927-28 |
| Roberts | L. C. | Cuballing | Dodge | CN ● 42 | Cuballing Road Board | 1926-27 |
| Roberts | L. H. | Bridgetown | Graham Wagon | B ● 140 | Bridgetown Road Board | 1926-27 |
| Roberts | L. H. | Bridgetown | Graham Wagon | B ● 140 | Bridgetown Road Board | 1927-28 |
| Roberts | L. W. | Second Avenue, Mount Lawley | Morris-Oxford | 1630 | Metro Private Car | 1927-28 |
| Roberts | M. | Dalwallinu | Dodge | DL ● 2 | Dalwallinu Road Board | 1924-25 |
| Roberts | M. | Dalwallinu | Dodge | DL ● 2 | Dalwallinu Road Board | 1925-26 |
| Roberts | M. | Coondle, Toodyay | Rugby | T ● 58 | Toodyay Road Board | 1925-26 |
| Roberts | M. | Dalwallinu | Dodge | DL ● 2 | Dalwallinu Road Board | 1926-27 |
| Roberts | M. | Toodyay | Rugby | T ● 59 | Toodyay Road Board | 1926-27 |
| Roberts | M. | Coondle, Toodyay | Rubgy | T ● 58 | Toodyay Road Board | 1927-28 |
| Roberts | M. | Dalwallinu | Dodge | DL ● 2 | Dalwallinu Road Board | 1927-28 |
| Roberts | M. F. | Cunderdin | Chevrolet Truck | ME ● 295 | Meckering Road Board | 1926-27 |
| Roberts | M. S. | Glenroyd Street, Mount Lawley | Erskino | 1515 | Metro Private Car | 1927-28 |
| Roberts | M. W. | Dandaragan | Buick 25 H.P. | DN ● 4 | Dandaragan Road Board | 1917-18 |
| Roberts | M. W. | Dandaragan | Buick 25 H.P. | DN ● 4 | Dandaragan Road Board | 1919 |
| Roberts | M. W. | Dandaragan | Buick 25 H.P. | DN ● 4 | Dandaragan Road Board | 1922-23 |
| Roberts | M. W. | Dandaragan | Buick | DN ● 4 | Dandaragan Road Board | 1923-24 |
| Roberts | M. W. | Dandaragan | Buick | DN ● 4 | Dandaragan Road Board | 1924-25 |
| Roberts | M. W. | Dandaragan | Buick | DN ● 4 | Dandaragan Road Board | 1925-26 |
| Roberts | M. W. | Dandaragan | Buick | DN ● 4 | Dandaragan Road Board | 1926-27 |
| Roberts | M. W. | Dandaragan | Buick | DN ● 4 | Dandaragan Road Board | 1927-28 |
| Roberts | Maitland W. | - | Buick 25 H.P. | D 4 | Dandaragan Road Board | 1915 |
| Roberts | Maitland W. | Dandaragan | Buick 25 H.P. | DN 4 | Dandaragan Road Board | 1916 |
| Roberts | Meredith | Dalwallinu | Dodge 35 H.P. | DL ● 2 | Dandaragan Road Board | 1919 |
| Roberts | Meredith | Dalwallinu | Dodge | DL ● 2 | Dalwallinu Road Board | 1922-23 |
| Roberts | Meredith | Dalwallinu | Dodge | DL ● 2 | Dalwallinu Road Board | 1923-24 |
| Roberts | Mrs | Stoneville | International Truck | GE ● 27 | Greenmount Road Board | 1927-28 |
| Roberts | Mrs E. | Hugh Street, Claremont | Chevrolet | 7537 | Metro Private Car | 1926-27 |
| Roberts | Mrs E. | 184 Railway terrace, Maylands | Chevrolet | 9600 | Metro Private Car | 1926-27 |
| Roberts | Mrs E. | 184 Railway Terrace, Maylands | Chevrolet | 9600 | Metro Private Car | 1927-28 |
| Roberts | Mrs E. | Suburban Road, South Perth | Whippet | 12692 | Metro Private Car | 1927-28 |
| Roberts | Mrs Ethel | 65 Lawler Street, Subiaco | Ford | 1165 | Metro Private Car | 1924-25 |
| Roberts | Mrs L. C. | Cuballing | Dodge | CN ● 42 | Cuballing Road Board | 1925-26 |
| Roberts | Mrs L. C. | Cuballing | Dodge | CN ● 42 | Cuballing Road Board | 1927-28 |
| Roberts | N. | Chidlow Street | Ford Truck | N 7 | Northam Municipality | 1926-27 |
| Roberts | N. | Chidlow Street | Ford Truck | N 7 | Northam Municipality | 1927-28 |
| Roberts | O. A. | 150 6th Avenue, Inglewood | Ford | 13424 | Metro Private Car | 1926-27 |
| Roberts | O. A. | 150 6th Avenue, Inglewood | Ford | 13424 | Metro Private Car | 1927-28 |
| Roberts | Owen | Dumbleyung | B.S.A. 3½ H.P. Motorcycle | DU ● 10 | Dumbleyung Road Board | 1919 |
| Roberts | R. C. | Kalamunda | Ford | DR ● 42 | Darling Range Road Board | 1924-25 |
| Roberts | R. H. | Waroona | Jewett | DK ● 19 | Drakesbrook Road Board | 1926-27 |
| Roberts | R. H. | Waroona | Jowett | DY ● 19 | Drakesbrook Road Board | 1927-28 |