PA 29 then crosses into Salisbury Township and widens into a four-lane road that passes between Lehigh Valley Hospital–Cedar Crest to the west and an office park to the east.

[2][3] Past the interchange, SR 1019 becomes a two-lane undivided road, passing through several suburban residential neighborhoods before entering South Whitehall Township.

Cedar Crest Boulevard comes to an intersection with a one-way pair carrying PA 222 in a business area in Dorneyville just east of Dorney Park & Wildwater Kingdom.

Cedar Crest Boulevard continues near homes and businesses in the western part of Allentown as a three-lane road with a center left-turn lane, crossing Lehigh Parkway, and then forming the eastern border of Trexler Park.

After crossing SR 1006 (Walbert Avenue) in Wennersville, Cedar Crest Boulevard passes through a mix of farmland and woodland with some development.

[2][3] In 1928, the section of Cedar Crest Boulevard from Walbert Avenue (US 309/PA 29) in Wennersville to Chestnut Street (PA 29) in Emmaus was designated as Pennsylvania Route 229.