It would be better if SMRT use 3 digits numbers for their
service...
61 can opt for
661,67-667,75,675,77-677,106-706,167-767,169-769,171-771,172-772
and the list go on and for 300/302/307 can opt for 730/732/737.The
former number can be use by SBST for their new service.
I see your rationale behind renumbering the services as you want it
to be by area and SMRT. But I think people will not be comfortable
as they are used to these bus numbers.
We are very averse to any changes and are used to the easy
good life. Even a number change will bother people and complain to
LTA. So LTA will just not do it.