1. Kumarage A.S., Sri Lanka Transport sector policy note final report, http://open_jicareport.jica.go.jp/pdf/12176665.pdf.
2. Department of National Planning, Ministry of National Policies and Economic Affairs of Sri Lanka. Investment program 2017 – 2020, http://www.mnpea.gov.lk/web/images/PIP_English/EnglishPIP-83-114.pdf.
3. Pilapitiya G., Remedies for traffic congestion. The Sunday Times Sri Lanka, http://www.sundaytimes.lk/161120/business-times/remedies-for-traffic-congestion-217284.html.
4. Indi.ca Colombo vehicle statistics 2015, https://indi.ca/2015/10/colombo-vehiclestatistics-2015/.
5. Ministry of Megapolis and Western development, https://www.scribd.com/document/365419966/Megapolis-Transport-Masterplan-final.