Were the medians in Staten Island's highways left there to accommodate future transit? I noticed that Staten Island's highways were all built with medians wide enough to accommodate a center-running 2 track rail line like those in Chicago. So it comes as no surprise that the MTA recently studied using this space for BRT or light rail in the West Shore &amp; KW Veterans Pkwy. 

As convenient as this space is, was it actually left there for rapid transit? As we know Robert Moses infamously built many of his highways without space for a subway (Horace Harding, Van Wyck), so it seems odd that the space was left where somebody in the future could use it to build a busway or light rail line.