This response did not address that a road with little traffic will see a major uptick in usage and I strongly feel West Highland should be considered for some safety features including: sidewalks; raised crosswalks, speed bumps, etc.

PennDOT is actively coordinating with the municipalities regarding traffic calming opportunities.  Please note that while sidewalks would be installed as part of a PennDOT project, maintenance of the sidewalks would be municipal responsibility and typically municipalities pass maintenance responsibilities on to the adjacent property owners.