Yep I like this route when taking it during young time. From Commonwealth Ave, bukit merah, chinatown, geylang, upper changi road (this is a very long mountainous single lane road from junction of siglap and new upper changi road today) till changi 10 miles(changkat changi) then changi village. Sad that in the name of progress, the longish Upper Changi Road has been butchered in many places.