GPS Device
Carol Zulman for The New York Times

Tapping its experience using GPS machine control for its earth-moving equipment, TACC Construction is using GPS to guide its slipform concrete curb and gutter paver at an Oakville, Ontario, planned-community project. "The technology is incredibly fast and accurate, so it helped us achieve grade tolerances without the dependence on survey crews pounding stakes everywhere," said Frank Saracino, road superintendent for TACC.

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