The hill backup was a highlight of the Serious Truck Challenge.
A crowd watches pervious concrete being place at Pervious Live.
A representative of Ritchie Bros. Auctioneers helps conduct the CIM auction.
Boris Stein, vice president, Twining Inc., (foreground) discusses volumetric concrete production as Richard Szecsy, chairman of ASTM C-09, looks on.
A contestant operates a skid steer in the John Deere Operator Challenge.
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