sentences:  The probability of the engine remaining within the NTE zone for over 30 seconds also decreases with the advent of high-power engines.For example, if the power required to maintain a motorcoach or an over-the-road truck at highway cruising speed is somewhere around , the probability that a engine will consistently operate at loads above 30%, without "dips" to lower power levels, can be relatively small.These concerns were confirmed by studies carried out by West Virginia University (WVU) under the Consent Decrees.