Stringless paving typically uses either total robotic stations with 3-D modeling or a global positioning system (GPS) with lasers to _____.
a. control the horizontal and vertical movement of a slip-form paver
b. pinpoint hairline cracks or similar defects before pavement is removed
c. help workers align stationary forms for concrete or HMA paving
d. provide the heat necessary to cure concrete or HMA pavement
a. control the horizontal and vertical movement of a slip-form paver
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