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.
Oliguria is the output of less than 400ml of urine in a 24 hour period. Although the normal urine output in a day is approximately 1 to 2 liters (30 to 70 fluid ounces), the body only needs to pass out between 300ml to 500ml per day to rid the system of excess solutes and waste products.