FYI - this may be of interest.
It's an excerpt from the
RAV Line Project Definition Alignment Study
(i.e. before the bidding by the proponents)
For No. 3 Rd in Richmond it assumed a centre median alignment and considered station configuration options.
Note that the entrance for a centre platform station would have been
in the median.
This is before InTransitBC thought "outside-the-box" and built the guideway along the east side of the street.