The Sterling Group-backed Frontline Road Safety, a pavement marking services provider, completed the acquisition of PK Contracting, a premier safety marking service provider. Financial terms were not disclosed. "PK Contracting is an exciting addition to the Frontline family. This partnership will establish a new road striping presence for the Frontline platform in Michigan and Florida, further diversifying our operating subsidiaries and increasing our scale," Tony Plut, Frontline Road Safety CEO.