Let me blow your mind: how about we lengthen the ramp and make its slope gentler by taking the little parking lot? I bet the police would be happy to have all their parking in a single chunk.
There's nothing special about today's mid-block access (is there?), that couldn't be moved 200' toward D st and a new curb cut. Move it as far as the turning radius of an articulated bus permits.
That way the Police could totally separately gate their access too.
Or let me blow your mind even further: Have buses going to the airport do a
onto D and a
onto a new downramp from D and skip the Silver Line Way stop.
[Reversed left/right]