The document analyzes public sentiment on social media in response to breakdowns on Singapore's public transit system from December 2011 to March 2012. It found a large spike in conversations on Twitter after the initial breakdown in December 2013, with sentiment turning negative towards the transit operator's management as breakdowns continued. While online chatter remained high for over a month, it decreased to 20-30% of initial volumes by the 3-month anniversary in March. The report concludes that public transit operators must closely monitor social media to address the key issues causing negative sentiment in order to effectively manage public relations during crises.