The sketches I've seen are only from 22nd station to Cambie and they are at grade, there isn't an abudance of traffic that would cross over the line in that area, so it should be fine not to mention cheap to implement, according to the sketches traffic is controlled with regular train crossing arms, some of the road crossings would be shut down completely.
I reckon we will see alot more info as EFL progresses, phase one is set for 2009 so it won't be much longer.
Not looking to invest anymore in the area.