The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.
Now, the New York Times offers the viewpoint that, in terms of cars and mileage, 200,000 is the new 100,000. Two numbers make it apparent that 100K is no big thing anymore: The average car on the road is about 11 years old, and the average car is driven about 15,000 miles per year. Multiply those figures together and youâve got a fairly average car with something like 165,000 miles on it.
Results from the 2001 NHTS show that daily travel in the United States totaled about 4 trillion miles (table 2, table A-8), an average of 14,500 miles per person per year. On a daily basis, the average person traveled 40 miles, most of it (35 miles) in a personal vehicle. Because more than one person can travel in a personal vehicle, these 35 person miles amounted to about 23 vehicle miles traveled. Annually, the total number of vehicle miles traveled in 2001 was nearly 2.3 trillion.