Sunday normally i don't drive.
The road closure info not only for avoiding the closed roads.
But such events like Marathon, road closure usally means most
participants will not be driving to the event.
Since most Marathon starts very early morning and participants
usually go early, when bus or MRT still have not start. Means on
the day 4-5am still got chance to find pax in neighbourhood heading
to town (event area)
Some Marathon they provide bus service though, like the previous
Real Run, but at least still got pax take cab to the bus pick up
point when midnight surcharge still in effect.
Also after the run, can find sweaty ladies without makeup
looking for a ride home 
The Kent Ridge Crescent closure not really useful for TD
