The tables show (Table a) the average speed of urban zone traffic (in kilometres per hour or kph) in a number of countries over a fifty-year period, including a future estimate; and also (Table b) the total number of urban zones per country (in thousands).

The first table illustrates changes in the average velocity of city

traffic

with a future forecast in the nine different countries over a period of fifty years, and the second table shows the figures for urban zones per country. It can be clearly seen from the table that Canada had the highest speed of urban

traffic

in 1970,

however

, Italy had the lowest. The total number of urban areas was the highest in the United States.

In contrast

, Chile and Italy had an equal figure at 1.1 (thousands) and were the lowest during the same period. Between 1970 and 2010, the figure for

traffic

speed in France increased moderately from 60

kph

to 68

kph

after which it will decrease to 52

kph

in 2020. From 1990 to 2010, the number for velocity of city

traffic

in Italy saw a significant growth from 38

kph

to 56

kph

,

while

that of Brazil remained stable at 53

kph

. In 2010, the figure for

traffic

in the USA was 53

kph

,

whereas

that of the UK was 56

kph

. The numbers for the year 2010 will decline to 43

kph

and 47

kph

respectively.

According to

the urban zones, all countries will experience a substantial increase except Russia, which will fall to 3,200 by 2020.