if i not wrong the other side of yellow 405 plate is covered with
pure yellow sticker 
btw, the interchange layout in all SBST info panels got 4
stickers covering the 4 services at sawtooth area. whats with
another one goes to?
It's covered riaos
Beats me though I noticed there's 4 svs being covered. However,
the indv sv info board dun have provision for another service other
than 179 & 199.
Oh yes, 179 & 199 has now moved to B3. 179A remains at
B4