Singapore Time (UTC+8:00) on April 20, 2004, a section of Nicoll Highway between Ophir Road and Merdeka Bridge collapsed, due to the failure of the retaining wall of the Circle Line tunnel below it.
Waktu Singapura (UTC+8:00) pada 20 April 2004, satu jajaran Lebuhraya Nicoll antara Ophir Road dan Jembatan Merdeka runtuh, berikutan kegagalan pada tembok penahan terowong Aliran Bulatan (Circle Line) di bawahnya.