The interstate highway system carries nearly 60,000 daily person miles per route mile, 26 times as many person miles per route mile as all other roads (including low usage rural roads), and 22 times as many person miles per route mile as intercity rail (Amtrak) and urban rail combined.
The expected urine output for an adult is 0.5ml/kg/hr. This roughly equates to 30-40ml per hour in an average sized adult.
Another method for identifying oliguria is urine output that is less than 0.5ml/kg/h (millilitres per kilogram of body weight per hour) in adults or less than 1ml/kg/h in infants. Anuria is a daily output less than 100ml. Rarely is there a total absence of urine output.