
Allentown dominates the eastern edge of this mid-century landscape, showing the suburban expansion of Salisbury and South Whitehall as residential developments like Parkside Courts began to fill the spaces between older villages. The map captures a moment when the regional transportation network was evolving, centered on the Pennsylvania Turnpike Northeast Extension cutting through the heart of the Lehigh Valley. Despite this modernization, the area's industrial roots remain visible at the Lock Ridge Park and Furnace Museum in Alburtis, preserving the local iron heritage.
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