2 6x1 foot ISLs

[Mr Fixit]

Depending upon the era being modelled and the industries being served, it is plausible for double slip switches to be used to gain access to those shippers. If the shipper[s] is/are of particularly high value/volume then the railroad will make the effort to gain access even if it means building a bridge [within reason of course], or a vehicle overpass or even setting up a car float operation. In his book Planning for Realistic Operation, John Armstrong gave as an example how a railroad had an overpass constructed so that they could access a factory precinct [today's industrial park equivalent] that required rail service.
Compared to building a small bridge over a road or river or building a overpass, having two double slip switches made is relatively cheap as all switch-work is custom made anyway so the incremental cost is not as great as it is for us modellers.
Besides who isn't looking for a way to incorporate one or more double slip switches to add interest.
Mark