I know you people might have seen it on WL-based service, But
when I enquired about 585L's status the 858 driver claimed it was
an Yishun bus(meaning it could be an AM or WL Bus in YI), And this
is as close as I can get unless people have the direct link to the
dispatching office and post it, which I don't think any of us has
it.
So far SMB66X I take your post that it is seen on WL/WR services
recently, but you might want to ask the 858 driver. The driver
didn't reveal much details to me yesterday other than claiming that
585 is an YI bus. As for which route, he is not clear.
This is as close as I can get, so if you guys have any luck with
drivers who could tell more please post it here. Thank you.
Perhaps perm 856? Or started service 858 from Yishun?