Mandai Road is a major road located in Mandai, in the northern area of Singapore. The road starts from Woodlands Road and ends at the junction of Sembawang Road and Upper Thomson Road. The road was built in 1855 in a jungle and appeared in the Franklin and Jackson Plan of Singapore (1828) as a river indicated as "R. Mandi". It has been said the name of the road comes from a tree known as the "Mandai tree".