Route 1 Alternative Proposes Extensive Intersection Improvements

According to PENNDOT intersections are the usually the most critical portion of the roadway network.
Then why won't PENNDOT improve them?

Map of Woodhaven Road Project Area intersections with operational deficiencies.
Condition: Turning Lanes Exist w/o Left Turn Signal. Exist Lane Markings should be improved.
  Condition: No Turning Lanes Exist
(Useable ROW Adjacent to Intersection)

 Condition: Turning lanes and green left turn signals exist, but other types of improvements needed..
The series of intersections with operational deficiences on Byberry Rd. undoubtedly contribute to the congestion

10: Evans St. and Byberry Rd. (Worst Intersection - Expressway pours onto Byberry Rd.