| The operational analysis of two-lane rural highways SC Van As, A Van Niekerk SATC 2004, 2004 | 44 | 2004 |
| Overflow delay in signalized networks SC Van As Transportation Research Part A: General 25 (1), 1-7, 1991 | 37 | 1991 |
| Traffic flow theory SC Van As, HS Joubert | 20 | 1989 |
| Applied statistics for civil engineers SC Van As, HS Joubert Civil Engineering Department, University of Pretoria, 1991 | 12 | 1991 |
| Pavement Evaluation: Test frequency requirements for deflection bowl parameters GJ Jordaan, SC van As | 11 | 1994 |
| Optimisation of the number and type of testing needed for the evaluation and assessment of pavements GJ Jordaan, JSM Venter, SC Van As Project Report PR 91, 249, 1992 | 9 | 1992 |
| The effect of heavy haul traffic on traffic geometry deterioration EP Kearsley, SC Vanas The fifth international heavy haul railway conference, 369-378, 1993 | 8 | 1993 |
| A practical approach for the determination of deflection test frequencies for pavement evaluations G Jordaan, C van As South African Annual Transportation Convention, 1993 | 7 | 1993 |
| Issues with traffic impact assessments JF Van Rensburg, SC Van As SATC 2004, 2004 | 6 | 2004 |
| Issues with the operational analysis of urban intersections P Pretorius, SC Van As, RJ Troutbeck SATC 2004, 2004 | 5 | 2004 |
| Deterioration of rail track geometry EP Kearsley, SC Van As Journal of the South African Institution of Civil Engineering= Joernaal van …, 1995 | 5 | 1995 |
| Traffic Signal Optimization Procedures and Techniques. SC Van As University of Southampton, 1979 | 5 | 1979 |
| The status of road safety audit and assessment in South Africa FJJ Labuschagne, SC Van As, LV Roodt SATC 2002, 2002 | 4 | 2002 |
| Country Report-South Africa SC van As, G Potgieter Third International Symposium on Intersections Without Traffic …, 1997 | 4 | 1997 |
| Revision of South African pavement design method L Kannemeyer, HL Theyse, BMJA Verhaeghe, SC Van As | 3 | 2015 |
| Design Hour for Rural Roads C van As, A van Niekerk Southern African Transport Conference, 2004 | 3 | 2004 |
| A queuing approach to speed-flow relationships on freeways SC Van As, A Van Niekerk SATC 2004, 2004 | 3 | 2004 |
| Guidelines for reports, dissertations and theses SC Van As Departmental Guidelines. Pretoria, South Africa: University of Pretoria, 2002 | 3 | 2002 |
| A traffic counting strategy for rural roads A Papenfus, C van As South African Annual Transportation Convention, 1992 | 3 | 1992 |
| Traffic accidents at intersections in Cape Town KC Lee-Jones, SC Van As Department of Transport, Chief Directorate Roads, 1994 | 2 | 1994 |
Gerrit JordaanJordaan Professional Services (JPS) / University of Pretoria, South AfricaVerified email at tshepega.co.za
