1. TomTom, Traffic index congestion level, https://www.tomtom.com/en_gb/trafficindex/list?citySize= LARGE&continent=ALL&country=ALL [accessed on June 29 ,2018].
2. National Science and Technology Development Agency,Importance and necessity of establishing the National Railway Technology Development Institute, http://www.thairailtech.or.th/?page_id=129 [accessed on June 30,2017].
3. Office of Transport and Traffic Policy and Planning, Ministry of Transport, Study on the development of a database of information and models for integration, Transportation and Traffic Development Multimodal transport and logistics, http://www.otp.go.th/index.php/edureport/view?id=64 [accessed on May, 15,2017].
4. Krungsri Research, Industry Trends for 2017-2019, Mass Rapid Transit Services, http://market.sec.or.th/public/ ipos/IPOSGetFile.aspx?TransID=92109&TransFileSeq=8 [accessed on June 29, 2018].
5. Office of Transport and Traffic Policy and Planning,Ministry of Transport , The Ministry of Transport's main missions under the (draft) Development Strategy Transport system of Thailand for 20 years(2017-2036) , http://www.otp.go.th/uploads/tiny_uploads/PolicyPlan/1- PolicyPlan/25600316-OpertionPlan/25600316-OpertionPlan3.pdf [accessed on June 25,2017].