Longitudinal cracking and low air content due to excessive vibration can cause premature concrete pavement deterioration. Because vibrator frequency is a key controllable factor affecting the consolidation defects that lead to such deterioration, state DOT specifications often require paving contractors to periodically measure the frequency. However, when this requires them to slow or stop the paver and use a hand-held tachometer, it slows production. The solution: Equip the paver's hydraulic vibrators with sensors that monitor frequency and permit a continuous readout.