(44) Public water system --A system supplying water to a number of connections or individuals, as defined by current rules and regulations of the Texas Commission on Environmental Quality, 30 TAC Chapter 290.
According to studies backed by the department of energy, the average car will be at its advertised MPG at 55 mph. But as the speed increases: - 3% less efficient at 60 mph. - 8% less efficient at 65 mph.
This assumption leads to the theory of. â85th percentile speed,â defined as the speed. 85% of drivers are moving at or below. Many studies have shown that despite the posted. speed limit on a given section of road, most. drivers tend to travel at a speed that is comfort-. able relative to roadway conditions and, at that. speed, the least amount of congestion and. crashes will occur.