Sunrise Highway construction, 1928

I have been puzzled about the date of the construction of Sunrise Highway through Seaford. This 1914 map in the collection of the New York Public Library shows Rail Road Avenue running east from Seaman's Neck Road (not west) on what appears to be the current alignment of Sunrise Highway.
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I have now chanced upon a brief news story in the Brooklyn Daily Eagle of May 13, 1928, "To Start Seaford Section of Sunrise Boulevard." The announcement was made by August Weber, jr., the realtor developing Seaford Manor north of the tracks.  Laying the foundation for the highway had already begun, and streets in the Seaford Manor development had been started.
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That news story may imply the Sunrise Boulevard connection from Wantagh, but it does not prove it.
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The aerial photo below was taken before the rectory of St. William's parish was built in 1940. Note a narrower Sunrise Highway in the upper left. The photo may be enlarged by clicking on it, but the quality of this snapshot of a glossy on display at St. William's (2.12.2016) is poor. The view is east. Jackson Avenue crosses the foreground. Washington Avenue can be seen crossing Sunrise Highway.