Aerial photograph of the new Union Boulevard, under construction in 1929, taken from about 4,000' altitude..   
<p>Union Boulevard had been a dirt path for decades prior to the construction of the Tilghman Street bridge over the Lehigh River.  Along with the bridge construction, Union Boulevard was paved and improved to provide a road to connect Allentown to Bethlehem though the Fifteenth Ward, which had been acquired some years earlier but was largely undeveloped.    
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Today Union Boulevard is a vital artery of business and commerce though the East Side of Allentown.   The intersection in the photo shows Union Boulevard and Irving Street.
Unknown author<span style="display: none;">Unknown author</span>
1929
Unknown photographer Self-scanned