| Estimation of socio-economic cost of road accidents in Metro Manila MRM DE LEON, PC Cal, RG Sigua Journal of the Eastern Asia Society for Transportation Studies 6, 3183-3198, 2005 | 76 | 2005 |
| Towards sustainable transport in developing countries: Preliminary findings on the demand for mobility-as-a-service (MaaS) in metro Manila M Hasselwander, JF Bigotte, AP Antunes, RG Sigua Transportation Research Part A: Policy and Practice 155, 501-518, 2022 | 63 | 2022 |
| Fundamentals of traffic engineering RG Sigua UP Press, 2008 | 41 | 2008 |
| Assessment of road safety in the ASEAN region RG Sigua, HSO Palmiano East Asia Society for Transportation Studies 5, 2032-2045, 2005 | 19 | 2005 |
| Urban Transport and Local Governance in Asian Developing Countries: In Search of Transport Policies (Iatss H493 Project Report) A Morita, K TAKEUCHI, RG SIGUA, K HONDA, S Fumihiko, A MURAKAMI Iatss Research 28 (1), 6-18, 2004 | 18 | 2004 |
| Maritime incident analysis using GIS R Sigua, G Aguilar Journal of the Eastern Asia Society for Transportation Studies 5 (11), 778-793, 2003 | 14 | 2003 |
| Evaluation of Metro Manila’s electronic toll collection (ETC) system GU Padayhag, RG Sigua Journal of the Eastern Asia Society for Transportation Studies 5, 1946-1961, 2003 | 12 | 2003 |
| Development of drive cycle and assessment of the performance of Auto-LPG powered public utility Jeepneys in Makati city, Philippines N Pokharel, E Abaya, K Vergel, RG Sigua Proceedings of the Eastern Asia Society for Transportation Studies 9, 2013 | 9 | 2013 |
| Development of driving cycle for Metro Manila RG Sigua Journal of the Eastern Asia Society for Transportation Studies 2 (6), 1995-2002, 1997 | 8 | 1997 |
| Methods of estimating energy demand and CO2 emissions for inter-regional road transport MB Sundo, KN Vergel, RG Sigua, JRF Regidor GEOMATE Journal 11 (23), 2182-2187, 2016 | 7 | 2016 |
| Allocation of electronic toll collection lanes at toll plazas considering social optimization of service times and delay CED Diaz, AU Mappala, RG Sigua, JJ Madrigal, HS Palmiano Proceedings of the Eastern Asia Society for Transportation Studies 5, 1496-1509, 2005 | 7 | 2005 |
| Development of drive cycle and emission concentration models for in-use tricycles in Metro Manila AA Abuzo, RG Sigua, KN Vergel Philippine Engineering Journal 25 (2), 2004 | 7 | 2004 |
| A study on the traffic characteristics of some arterial roads in Metro Manila RG Sigua Proceedings of the First Conference of the Transportation Science Society of …, 1993 | 7 | 1993 |
| Motorcycle involvement in road crashes in Metro Manila RG Sigua Journal of the Eastern Asia Society for Transportation Studies 8, 1934-1943, 2010 | 6 | 2010 |
| Shopping centers in Metro Manila and necessity for traffic impact study HSO PalMIANO, T Kurokawa, RG Sigua Journal of the Eastern Asia Society for Transportation Studies 3 (4), 107-122, 1999 | 5 | 1999 |
| Traffic problems at jeepney stops and proposals for the development of a better jeepney stop policy JRF Regidor, H Ieda, RG Sigua Transportation Science Society of the Philippines Journal 1 (1), 57-69, 1996 | 5 | 1996 |
| Development of a Knowledge-Based Expert System for Intersection Improvement MP De Guzman, RDG Sigua Proceedings of the Eastern Asia Society for Transportation Studies Vol. 7 …, 2009 | 4 | 2009 |
| Development of emission and engine testing procedures and standard sidecar design prototype for tricycles MJD CAMAGAY, RG Sigua, KN VERGEL, AC MATIAS, LAM DANAO Journal of the Eastern Asia Society for Transportation Studies 6, 3151-3166, 2005 | 4 | 2005 |
| Marine transportation and safety R Sigua, GD Aguilar Archipelagic studies charting new waters. University of the Philippines …, 1999 | 4 | 1999 |
| Development of Drive Cycles and Measurement of Fuel Economies of Light Duty Vehicles in Metro Manila EB Abaya, KB Vergel, EN Quiros, R Sigua SAE Technical Paper, 2018 | 3 | 2018 |
