The massive yellow Terex tractor sawed its carbide-tipped blades 12 inches into the surface of Greenfield Road on a recent Wednesday and inched forward.

Portland cement dust poofed into the air.

The East Lampeter Township landscape trembled underfoot.

Adam Hall, an engineer with Herbert, Rowland and Grubic Inc., 1846 Charter Lane, monitored the work approvingly.

Hall said such paving projects, which entail recycling much of the existing road surface at the job site, represent the future of municipal paving.

The emerging trend is a business windfall for HRG, which analyzes roadway core samples and designs construction plans for its clients.