Highland has contracted with the Pennsylvania Department of Transportation on the following projects:
SR 0018-20F, Browns Creek Br 2, Greene County
SR 0018-V10, Eastview Bridge project, Greene County
SR 0018-X10, Browns Creek Br, Greene County
SR 0019-A10, Dunkard Creek Br, Greene County
SR 0019-N00, Washington & Jefferson, Washington County
SR 0019-Z10, SR 19 @ Valleybrook Road project, Washington County
SR 0021-J10 project in Uniontown, Fayette County
SR 0030-134, Jeannette Area SAMI project, Westmoreland County
SR 0040-136 SR 40 at Dearth and Canistra Rds, Fayette County
SR 0070-Y20, I-70 @ SR 519 Interchange project, Washington County
SR 0040-129, Chalk Hill project, Fayette County
SR 0079-P10, I-79 Meadow Lands Interchange project, Washington County
SR 0088-A10, Point Marion Bridge project, Fayette and Greene Counties
SR 0088-S10, Dry Tavern Bridge project, Greene County
SR 0119-A01, Sony Interchange project, Westmoreland County
SR 0130-M10, SR 130, Jeannette, Westmoreland County
SR 0130-S10, Slate Creek Bridge project, Westmoreland County
SR 0130-W10, Pleasant Unity, Westmoreland County
SR 0188-A10, Jefferson Road Bridge project, Greene County
SR 0217-E10 Derry Road Bridge, Westmoreland County
SR 0331-L10, Brush Run Br, Washington County
SR 0519-138 Intersection with SR 1055, Washington County
SR 0519-M10, Western Ave Br, Washington County
SR 0711-A00, Connellsville Truck Ramp, Fayette County
SR 0844-Q10, Chartiers Creek Br, Washington County
SR 0980-139 Montour Trail Bridge, Washington County
SR 1006-A10, Freeman Run Bridge project, Westmoreland County
SR 1006-D00, Moon's Bridge, Westmoreland County
SR 1009-C10 Pike/Country Club Rd, Washington County
SR 1009-L10, McPherson Bridge, Washington County
SR 1022-A10 Donora-Webster Bridge, Westmoreland & Washington Counties
SR 1039-C10, Dickerson Run, Fayette County
SR 1049-A10, Dunbar Twp Grade Bridge project, Fayette County
SR 2001-A10, Rudolph Run Bridge project, Greene County
SR 2018-A10, Charleroi-Monessen Br, Westmoreland County
SR 3009-B10, Georges Creek Bridge project, Fayette County
SR 3013-J10, Middle Run Br, Fayette County
SR 3017-251 Myoma Bridge, Butler County
SR 3037-D10, Waltz Mill Bridge, Westmoreland County
SR 3071-E10, Arona Bridge, Westmoreland County
SR 3077-A10, Edna Road, Westmoreland County
SR 4003-02R, Prison Road project, Fayette County
SR 4010-B10, Coal Street Bridge, Westmoreland County
SR 4018-A10, Cross Creek Bridges, Washington County
SR 4029-A02, Avella Bridge, Washington County
SR 4033-A10, Swartz Bridge, Greene County
SR 4041-E10, Turtle Creek Bridge project, Westmoreland County