Figure 2 Basic Variables of Human Mobility as Functions of Daily Distance Traveled

Figure 2
Basic Variables of Human Mobility as Functions of Daily Distance Traveled

a: Travel Time
Travel time budget, h/cap/d

Figure showing travel time budget as a function of daily distance traveled in various countries and years
Daily distance traveled, km/cap/d

b: Travel Money Expenditure Shares
Travel money budget, percent disposable income

Figure showing travel money budget as a function of daily distance traveled in various countries and years
Daily distance traveled, km/cap/d

c: Trip Rate
Trip rate (cumulative), trips/cap/d

Figure showing trip rate as a function of daily distance traveled in various countries and years
Daily distance traveled, km/cap/d

d: Trip Distance
Mean trip distance, km/trip

Figure showing trip distance as a function of daily distance traveled in various countries and years
Daily distance traveled, km/cap/d

Empty circles in 2a = travel diary plus CATI
Dashed lines in 2a = 1 standard deviation

Note: The daily distances traveled in African villages were estimated by multiplying the travel time budget by a mean walking speed of four kilometers per hour. Those in Japan were derived from Japans Statistic Bureau (1995) and multiplied by 0.86, the ratio of the survey-based automobile travel distance to that reported by official transit statistics. The data points in 2b slightly overestimate travel money expenditure shares since the survey-based daily travel distances often underestimate long distance travel (see table 2), whereas the economic statistics-based travel money budget figures account for all travel.

Sources: Table 1 for travel time and components, OECD (various years), and U.S. Department of Commerce (various years)