This page details the route of the Motor Parkway in Suffolk County, east of the Maxess Avenue bridge. East of the intersection of today's Ruland Road (not shown on map) and Pinelawn Road (running north and south in yellow), Ruland runs into Colonial Springs Road (also shown above as East Neck Road). This 1952 map from Hagstrom's Suffolk County atlas shows the Motor Parkway coming from the west (the blue line I've added), crossing Pinelawn Road and even though not actually shown, passing through (i.e., under) a number of streets. Interesting is that these streets do not exist today, and this map is the only evidence I've come across of these streets. I need to do additional research to see if these streets were ever actually there. The red line is where I imagine the Motor Parkway having been before it started to travel southeast (the blue line again).