Figure 6
Substitution of Travel Time and Money Expenditures

Travel time expenditures, h/cap/d

Adjusted travel money expenditures in percentage of income

Note: Surveys with consistent methods and without obvious bias are represented with black data points. White dots indicate unknown survey methods or when only one survey was available

Sources: Table 1 for travel time budgets; OECD (various years) and U.S. Department of Commerce (various years) for money expeditures.